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Nordic Naturals

Ultimate Omega-D3 2X

Omega · Softgel · 30 servings

Label snapshot

What the label says

What the product contains and what one serving costs, according to our catalog. Label amounts are not personal dose recommendations.

EPA and DHA per serving
EPA 1,125 mg · DHA 875 mg
Form
Softgel
List price (catalog, USD)
$55.95
Price per serving
$1.86List price divided by servings per container. A per-day cost only if the label serving is once daily.

Reading notes

  • Omega-3 figure is the catalog's stored omega-3 amount. Compare EPA and DHA lines separately.
  • Vitamin amounts shown in µg/mg. Labels may use IU.
Full label record: servings, testing, ingredients
Servings per container
30
Catalog monthly estimate
$55.95
Testing disclosure
Brand lists third-party testing and a public certificate of analysis (CoA)Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
EPA/DHA
EPA 1,125 mg · DHA 875 mg

Ingredients as listed

IngredientAmount per serving
Omega-3 (EPA/DHA)2,150 mg
Vitamin D325 µg

What to check on the label

  • Find EPA and DHA as separate milligram lines. A large 'fish oil 1,200 mg' number is the oil weight, not the omega-3 content.
  • Check how many softgels make one serving. The amounts here are per label serving.
  • Look for the oil form (triglyceride, re-esterified triglyceride, ethyl ester) and for a batch report on oxidation (TOTOX). The catalog stores these only when the brand publishes them.
  • Algal oils list DHA and EPA the same way. Source species and sustainability marks are stored when listed.

Catalog verification record (reviewed 2026-08-07)

  • Source cross-validated Species, region, and sustainability certification confirmed across manufacturer and certification body sources.
  • Batch lab-validated IFOS batch report confirms EPA/DHA content, TOTOX, and contaminant levels.
  • Repeated consumer theme Same tolerability, complaint, or praise pattern found across multiple public consumer discussions.

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Amounts are per label serving as recorded in the catalog and are not a recommendation. Testing status reflects what the brand lists. Nothing here is medical advice.

Editorial score and research-dose calculations

These calculations describe our scoring method. They are not a recommended dose or proof of benefit from this product.

8.6/10
Overall score
#10 / 37 in Omega

Full trial dose, public lab certificate, tested by independent lab.

Read the evidence (3 studies)
Add to compareVisit brand site →
Tier 3
Ingredient RCT (matching dose)
The ingredient was tested in an RCT at the same dose this product sells.
See the 3 supporting studies
How we scored this product Show the full breakdown
Dose vs. studies (50%) Why 10.0 of 10. Primary ingredient is Omega-3 (EPA/DHA) (evidence grade A). It delivers 2150 mg, inside the studied range of 1000–4000 mg. Read the rule → 10.0
Transparency (20%) Why 9.0 of 10. Earned points for public certificate of analysis and independent third-party testing and all doses disclosed. Read the rule → 9.0
Value (10%) Why 7.7 of 10. One day at the trial dose costs about $1.73. That is more expensive than average (178 of 313 by cost per effective day). Read the rule → 7.7
Formulation (10%) Why 8.0 of 10. The delivered form has published absorption data showing it works better than the standard version (here: re-esterified triglyceride (rTG) or phospholipid (krill) rather than ethyl ester). Read the rule → 8.0
Safety (5%) Why 8.5 of 10. Baseline 5.0. Third-party testing adds 2.0. Public lab certificate adds 1.5. NSF, USP or Informed Choice certification adds 1.5. Active safety signal subtracts 3.0. Read the rule → 8.5
Community sentiment (5%) Why 6.8 of 10. Sentiment across 10 external review source(s) is mixed to positive. Community is a signal about daily use, not proof of effect. Read the rule → 6.8
Composite How this 8.6 is built. 0.50 × 10.0 + 0.20 × 9.0 + 0.10 × 7.7 + 0.10 × 8.0 + 0.05 × 8.5 + 0.05 × 6.8 = 8.6 out of 10. Safety caps applied after. 8.6
8.6 composite
Dose vs. studies50%10.0
Transparency20%9.0
Value10%7.7
Formulation10%8.0
Safety5%8.5
Community5%6.8

Evidence gates dose: the evidence grade sets the ceiling, and the dose decides how much of that ceiling the product reaches. Value = inverse of price-per-trial-dose-day. Community = mean sentiment of external reviews. Safety caps applied after weighting.

This score is our editorial judgment, not a scientific standard. We combine published evidence, dose, price, transparency, and consumer signals into one composite: this is our method, not a peer-reviewed clinical rating. A higher score means a product does better on the factors we weight, not that it is medically proven to work.

Read the full method →

Editorial verdict

Quick verdict

8.6 / 10
Best for
Full trial dose, Public lab certificate
Avoid if
No major red flags
Full-dose status
Meets trial dose
Price/month
$56
COA status
Public
Biggest caveat
At $1.73/day it's on the expensive side.
Nearest alternatives
Catalog snapshot. Check linked sources for current price, label and batch-specific testing.
Price verification
Current price: $55.95
Last price check: Sep 01, 2026
Add to compareVisit brand site →
Layer 2 · Context

Our summary

Nordic Naturals Ultimate Omega-D3 2X combines the company's flagship high-concentration fish-oil formula (2150 mg total omega-3s, EPA-dominant at 1125:875 mg EPA:DHA) with a modest 1000 IU (25 mcg) dose of vitamin D3 in a single softgel. This is a convenience/bundling product rather than a novel formulation: no clinical trial has tested this exact combination or dose pairing, and the closest analog, the large NIH-funded VITAL trial, used lower omega-3 and higher vitamin D doses delivered as separate capsules, finding no significant reduction in its primary cardiovascular or cancer endpoints, with some secondary benefits in advanced-cancer risk. Ingredient-level meta-analyses generally support modest cardiovascular benefits from omega-3 supplementation, with EPA-dominant formulations outperforming DHA-heavier ones in pooled trial data, a modestly favorable signal for this EPA-leaning product, tempered by a consistently observed increase in atrial fibrillation risk across the omega-3 category. The 1000 IU vitamin D3 dose is adequate as a maintenance dose for most vitamin D-sufficient adults but is likely insufficient to correct a diagnosed deficiency based on published dose-response trials, so buyers with known low vitamin D levels should not assume this product alone will normalize their status. The base fish-oil concentrate has a solid independent-testing pedigree via IFOS certification and ConsumerLab recognition, though this dossier could not locate independent lab data confirming the added vitamin D3's potency in this specific combination SKU.
In plain language

Why this scored this way

This Nordic Naturals Ultimate Omega-D3 2X scores 9.1, making it one of the highest-scoring products on the site. It delivers 2150mg of Omega-3 (EPA/DHA), inside the studied range of 1000–4000mg with grade A evidence (strong human trial data). Transparency is a clear strength (score: 9.0), with third-party testing and a public lab certificate. At $1.73/day it's among the more expensive options in Omega.

What drives the score up

  • Dose-evidence score of 10.0 reflects good alignment with trial doses.
  • Quality transparency of 9.0: tested by independent lab with a public lab certificate.
  • Omega-3 (EPA/DHA) is dosed at the full research level with grade A evidence (strong human trial data).
  • Vitamin D3 is dosed at the full research level with grade A evidence (strong human trial data).
  • Vitamin D3 is also dosed at the full research level.

What drags it down

  • At $1.73/day it's on the expensive side.

Why you'd choose it

  • You want Omega-3 (EPA/DHA) from a Nordic Naturals product.
  • You prioritise tested by independent lab products with public lab certificates.
  • You want doses that align with published research.

Why you might skip it

  • You want a cheaper option (this is $1.73/day).
Question 1

Does the molecule work?

The science behind each active ingredient, independent of which brand sells it.

Omega-3 (EPA/DHA)

The single best-supported longevity supplement most people don't take enough of.

8 landmark RCTs · US: Dietary supplement + Rx (Vascepa/Lovaza) · EU: Food supplement, health claims authorised
Vitamin D3

Cheap, safe, and correcting a deficiency you probably have.

1 landmark RCT · US: Dietary supplement · EU: Food supplement (upper limit 100 μg/day)

Full ingredient breakdown

Every active in this formula, its declared dose per serving, the dose used in the primary human trial, how much of that trial dose this product delivers, and the evidence grade for the ingredient itself.

IngredientDose / servingResearch dose% of researchEvidence grade
Omega-3 (EPA/DHA)2150 mg2000 mg108%A
Vitamin D30.025 mg0.05 mg50%A

Percentages are dose per serving ÷ primary trial dose. Below 50% means the formula is unlikely to reproduce the trial outcome for that active. Grade A = multiple large human RCTs. Grade F = no human evidence. How grades work. Full glossary →

Question 2

Is this bottle good?

The specific product: dose, price, transparency, and what buyers report.

Dose vs research
100% of trial dose
Meets or exceeds the published effective dose
Cost at trial dose
$1.73/day at trial dose
What one effective daily dose actually costs
Transparency
9.0/10 · Public lab certificate (quality: not assessed)
Independent batch testing confirmed
Consumer signals
4 reviews across platforms · 2.5/5 · medium confidence
Operational signal only, never used as clinical evidence
Question 3

What's the catch?

Safety flags, transparency gaps, dosing concerns, and recurring buyer complaints.

!
Review advised
omega 3: bleeding risk with anticoagulants
Safety signals
Atrial fibrillation signal — omega-3
A meta-analysis of RCTs found that high-dose EPA-dominated omega-3 supplementation (≥1 g/day) was associated with a 25% relative increase in atrial fibrillation risk. Risk appears dose-dependent and higher with pure EPA formulations.
Read more
Drug interaction risk — omega-3
High doses (2-15 g/day) may increase bleeding time; caution with anticoagulants/antiplatelet drugs.
Read more
Safety flag
omega 3: bleeding risk with anticoagulants
Dose or interaction risk detected. See ingredient page for details.
Plain English

What’s inside

The main ingredients of this product, in plain language.

Omega-3 (EPA/DHA)2150 mgEvidence A

The single best-supported longevity supplement most people don't take enough of.

Read about Omega-3 (EPA/DHA) →
Vitamin D30.025 mgEvidence A

Cheap, safe, and correcting a deficiency you probably have.

Read about Vitamin D3 →
Layer 3 · Evidence vault

Product data & verification

Hard numbers and independently checked status. Expand each block for its source.

The numbers

Price
$56
per bottle · 30 servings
Dose vs. research
of trial dose 100%
of published effective dose
$ / day at studied dose
$1.73
what one effective daily dose costs
$ / g active
$0.87
per gram of active substance
Independently checked

Data verification

COA status
Public
Evidence grade
AA
Per-ingredient breakdown
AOmega-3 (EPA/DHA)
AVitamin D3

All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Evidence grades are reviewed when new human RCTs are published. Read how we verify.

What's inside

Ingredient
Dose in this product
Trial dose
Evidence
Omega-3 (EPA/DHA)
The single best-supported longevity supplement most people don't take enough of.
REDUCE-IT 2019 (NEJM)VITAL Trial 2019 (N=25,871)Khan et al. 2021 (38 RCTs meta-analysis)
2150 mg 108% of trial dose
2000 mg
Vitamin D3
Cheap, safe, and correcting a deficiency you probably have.
VITAL Trial 2018
0.025 mg 50% of trial dose
0.05 mg
2.9 /5
Medium confidence
4 reviews across 4 platforms (4 sources)
Source diversity: 92%
Examine.comLabdoorRedditTrustpilot
PraiseA third-party roundup citing Labdoor scores lists Nordic Naturals Ultimate OmegaExamine's fish oil page says EPA and DHA reliably lower triglycerides but do not
Last checked: 2026-08-20

Consumer signals

2.5 out of 5 across 4 verified reviews on 6 platforms.

Medium confidence

Auto-gathered from public review platforms via pplx_sdk fetch.

Trustpilot

4 reviews · 2.5/5 · mixed sentiment

Themes

The Nordic Naturals corporate Trustpilot page shows a 2.5/5 rating, but from only 9 reviews, so it's a thin sample. The complaints that d...

Compiled from a Trustpilot Nordic Naturals listing located during manual research; not independently re-verified against the live page at build time.

Reddit

1 thread discussed · mixed sentiment

Themes

A recurring Reddit thread asks whether Nordic Naturals Ultimate Omega is worth the price. Commenters generally like the product quality b...

Compiled from a Reddit r/Supplements listing located during manual research; not independently re-verified against the live page at build time.

Labdoor

positive sentiment

Praise

A third-party roundup citing Labdoor scores lists Nordic Naturals Ultimate Omega D-3 at 73.8 out of 100, a good but not top-tier grade. A...

Compiled from a Labdoor listing located during manual research; not independently re-verified against the live page at build time.

Examine.com

positive sentiment

Praise

Examine's fish oil page says EPA and DHA reliably lower triglycerides but do not appear to reduce cardiovascular events. It also flags co...

Compiled from an Examine.com listing located during manual research; not independently re-verified against the live page at build time.

Amazon

8,240 reviews · 4.7/5

Praiseno fishy burps, easy to swallowtrusted long-running brand, consistent quality
Complaintsfishy smell/aftertaste in some batches

quality control complaints on some recent orders (clumped or melted softgels)

Reddit r/Supplements

4 threads discussed · positive sentiment

Themesseen as a top-tier, physician-recommended fish oil brand

known limitation: Nordic Naturals products are not IFOS-certified because of the lemon flavoring additive

price complaints as the line has gotten more expensive

These are consumer sentiment signals. They do not measure whether the product actually works. See our evidence section for that.

Independent external anchors

Public sources on this same product, unrelated to NO1GEVITY. NIH DSLD is the US government's registered label database (shown verbatim). SuppCo.com is a separate, unaffiliated commercial site with no partnership or data-sharing arrangement with us. NO1GEVITY scores are computed independently of both.

Unaffiliated third-party site
SuppCo.com

SuppCo is a separate, unaffiliated supplement-tracking site with no partnership, data-sharing agreement, or business relationship with NO1GEVITY. We are not endorsed by them and they do not endorse us. The two facts below are individually verified against the manufacturer or NSF; the outbound link is provided only so readers can independently cross-check on a third-party site if they want to.

Tested by independent lab, Yes
NIH DSLD registered label
DSLD ID 288746, UPC 7 68990 06105 9
Serving size2 Softgel(s)
Servings per container30
Supplement Facts panel, verbatim
Calories15 Calorie(s)
Total Fat1.5 Gram(s)2% DV
Vitamin D325 mcg125% DV
Total Omega-3 Fatty Acids1120 mg
Cholesterol5 mg

What others say, with a source hierarchy

We treat external opinion very differently depending on where it comes from. Tier A is our strongest signal. Tier C is background sentiment only. Tier Rejected is what we excluded, listed openly so you can see what we discarded.

These reviews are aggregated from third-party sources, not written by NO1GEVITY. Each entry shows its source, retrieval date, and whether the source has an affiliate or paid relationship. We do not edit reviews to change their meaning. Disclosure policy.

Tier A

Independent deep reviews, lab tests, certificates of analysis

Our strongest external evidence. Long-form independent reviews, physical-product lab work, and third-party certifications.

ConsumerLab.com, Nordic Naturals brand overview
No affiliate relationship Not a paid placement

Independent lab testing supports the brand's general reliability for omega-3 potency and purity, though ConsumerLab's specific published test data covers the brand's flagship Ultimate Omega SKUs rather than confirming this exact D3-combination product line-item.

Finding: ConsumerLab's ongoing independent testing has repeatedly named Nordic Naturals fish-oil products among its 'Top Picks' across various testing rounds of its omega-3 supplement category review.
How we use it: Used as brand-level, not product-specific, evidence of independent lab credibility.
International Fish Oil Standards (IFOS) certification program
No affiliate relationship Paid placement

Strong independent purity/potency signal for the base fish-oil concentrate used in this product, though brands pay IFOS for certification (paid but methodologically independent testing model), and the certificate reviewed does not appear to be specific to the D3-added SKU.

Finding: Flavored Ultimate Omega base oil earned IFOS's 5-star (top) rating across oxidation (TOTOX), heavy metals, and EPA/DHA potency testing in the certificate reviewed.
How we use it: Used as directional purity evidence for the shared fish-oil base, with the paid-certification caveat disclosed.
Consumer Reports fish oil supplement test (2012, with correction)
No affiliate relationship Not a paid placement

An older but rigorous independent test found no red flags on potency or contamination, with an explicit methodological caveat about the freshness sub-test rather than a negative freshness finding.

Finding: Nordic Naturals' lemon-flavored Ultimate Omega (1000mg, 180-count SKU, a different serving size than this product) met labeled omega-3 content and passed US Pharmacopeia and EU contaminant standards including the stricter California Prop 65 PCB limit; could not be scored on the outlet's standard spoilage/freshness test because lemon-oil flavoring interfered with that specific assay.
How we use it: Used as a historical, brand-level (not D3-SKU-specific) independent quality data point, with the test-limitation caveat disclosed.

Community threads and aggregate ratings

Additional public mentions we located, kept separate from the deep independent reviews above.

Trustpilot Nordic Naturals · 2.5
mixed

The Nordic Naturals corporate Trustpilot page shows a 2.5/5 rating, but from only 9 reviews, so it's a thin sample. The complaints that do exist concentrate on returns and refunds, not product quality.

Read source → Unverified · we received no payment for this listing
Reddit r/Supplements
mixed

A recurring Reddit thread asks whether Nordic Naturals Ultimate Omega is worth the price. Commenters generally like the product quality but several say the price has become hard to justify compared to competing fish oils.

Read source → Unverified · we received no payment for this listing
Labdoor
positive

A third-party roundup citing Labdoor scores lists Nordic Naturals Ultimate Omega D-3 at 73.8 out of 100, a good but not top-tier grade. A separate Reddit thread notes the base Nordic Naturals fish oil line only scored a C grade on Labdoor despite its reputation as a top brand.

Read source → Unverified · we received no payment for this listing
Examine.com
positive

Examine's fish oil page says EPA and DHA reliably lower triglycerides but do not appear to reduce cardiovascular events. It also flags common mild side effects like fishy burps and stomach upset.

Read source → Unverified · we received no payment for this listing
Layer 3 · Evidence vault

Evidence, claims & regulation

Published evidence, claim checks, regulatory status and what could not be verified.

Evidence, what actually backs this product

Longevity brands rarely test their exact finished product. We separate what's tested from what's inferred.

Strongest evidence tier
Tier 3Ingredient RCT (matching dose)
4 studies mapped
Tier 3Ingredient RCT (matching dose)
Marine n-3 Fatty Acids and Vitamin D Supplementation and Primary Prevention of Cardiovascular Disease and Cancer (VITAL trial)
Manson JE, Cook NR, Lee IM, et al. · 2018 · New England Journal of Medicine · n=25871 · 1 g/day marine omega-3 (460 mg EPA + 380 mg DHA, roughly one-third this product's EPA+DHA dose) and/or 2000 IU/day vitamin D3 (double this product's D3 dose), each vs. matching placebo · Median 5.3 years
ingredient-levelpeer-reviewed
No statistically significant reduction in the primary composite cardiovascular endpoint (HR 0.92, 95% CI 0.80 to 1.06) or in overall invasive cancer incidence for either the omega-3 or vitamin D arms.
This is the largest and most rigorous RCT testing omega-3 plus vitamin D together, but it used separate capsules for each nutrient (not a single combined softgel), at roughly one-third the EPA+DHA dose and double the D3 dose of this Nordic Naturals product, so it is directionally relevant ingredient-category evidence, not exact-product or exact-dose evidence. A secondary pooled analysis (PMID 31733345) and a fish-intake-modified subgroup analysis for cancer (PMID 33206192, showing vitamin D reduced advanced/metastatic cancer risk by 17%, HR 0.83, more pronounced in normal-BMI participants, HR 0.62) found some secondary benefits not reflected in the primary null result.
Conflicts: Funded by NIH (National Cancer Institute, NHLBI, ODS, NIAMS); Pronova BioPharma/BASF and Pharmavite donated study pills but had no role in study design/analysis
Source →
Tier 4Ingredient RCT (different dose)
Vitamin D3 and vitamin D deficiency: dose-response evidence at 1000 to 5000 IU (contextual, see companion Vitamin D3 5000 dossier for full registry)
Multiple (see evidence registry in nordic-naturals_vitamin-d3-5000.json) · 2016 · Various · n=183 · 1000 IU/day, 5000 IU/day, or 50,000 IU/week for 8 weeks · 8 weeks
ingredient-levelpeer-reviewed
1000 IU/day (the dose in this product) achieved 25(OH)D sufficiency (≥20 ng/mL) in only a minority of deficient participants; 5000 IU/day performed substantially better (56% reaching sufficiency).
Cited to give an honest dose-context anchor: this product's 1000 IU D3 dose is a maintenance-level dose adequate for many healthy adults with normal baseline levels, but published correction trials suggest it is likely insufficient to correct a diagnosed vitamin D deficiency on its own, a person who is actually deficient would likely need a higher-dose product (such as this brand's own Vitamin D3 5000 SKU) rather than this combination softgel.
Conflicts: None identified
Source →
Tier 5Mechanistic / animal / marketing
Effect of omega-3 fatty acids on cardiovascular outcomes: A systematic review and meta-analysis
Khan SU, Lone AN, Khan MS, et al. · 2021 · eClinicalMedicine (Lancet) · n=149051 · Varied across pooled trials (EPA monotherapy and EPA+DHA combination regimens) · Varied across pooled trials
ingredient-levelpeer-reviewed
Omega-3 supplementation was associated with reduced cardiovascular mortality (RR 0.93), non-fatal MI (RR 0.87), coronary heart disease events (RR 0.91), and major adverse cardiovascular events (RR 0.95), but also increased atrial fibrillation risk (RR 1.26); EPA-only regimens showed larger relative risk reductions than combined EPA+DHA regimens.
Ingredient-level meta-analytic evidence, not specific to this product's exact 1125:875 EPA:DHA ratio or its added vitamin D3. Notably found EPA-dominant formulations outperformed EPA+DHA combinations on most endpoints, relevant context since this product is DHA-heavier than some EPA-dominant competitors, and also relevant to the atrial-fibrillation signal that applies across the omega-3 category, not uniquely to this product.
Conflicts: None identified
Source →
Tier 5Mechanistic / animal / marketing
Effects of omega-3 fatty acids on coronary revascularization and cardiovascular events: an updated meta-analysis
Sanmartin AM, Marenco M, et al. (as summarized in European Journal of Preventive Cardiology) · 2024 · European Journal of Preventive Cardiology · n=134144 · DHA+EPA combination (n=52,498) or EPA alone (n=14,640) vs. placebo/control · 4.5 months to 7.4 years across pooled trials
ingredient-levelpeer-reviewed
Omega-3 supplementation reduced revascularization risk (RR 0.90), MI (RR 0.89), and cardiovascular death (RR 0.92); EPA-alone regimens showed significantly larger risk reductions than EPA+DHA combination regimens across nearly all outcomes.
Reinforces the 2021 Khan et al. finding that EPA-dominant formulations outperform mixed EPA+DHA formulations in trials, this Nordic product is EPA-dominant (1125 mg EPA vs. 875 mg DHA) but still a mixed formulation, not a pure-EPA product like prescription icosapent ethyl (Vascepa), which showed the largest effects in the landmark REDUCE-IT trial (not separately re-verified in this research pass).
Conflicts: Not fully disclosed in available excerpt
Source →
Evidence

Research behind this product

The studies that established the trial dose and evidence grade for each active ingredient in this product. Click through to read the original paper.

Omega-3 (EPA/DHA)REDUCE-IT 2019 (NEJM)
Omega-3 (EPA/DHA)VITAL Trial 2019 (N=25,871)
Omega-3 (EPA/DHA)Khan et al. 2021 (38 RCTs meta-analysis)
Omega-3 (EPA/DHA)Bernasconi et al. 2021 (Mayo Clin Proc)
Omega-3 (EPA/DHA)Barbaresko et al. 2023 (cognitive review)
Omega-3 (EPA/DHA)Abuknesha & Harris 2026 (Circ Arrhythm Electrophysiol)
Omega-3 (EPA/DHA)Lok et al. 2026 PISCES Trial (NEJM)
Omega-3 (EPA/DHA)Norouzzadeh et al. 2026 (J Am Nutr Assoc)
Vitamin D3VITAL Trial 2018

Claim check, vendor claims vs. our reading of the evidence

Not medical advice. We list the strongest claims made by the brand and check each against traceable evidence.

Partial support
“Supports heart, brain, immune, and bone health in one softgel”
Each individual ingredient has a genuine, well-documented mechanistic and epidemiological association with these systems (omega-3s with cardiovascular/cognitive health; vitamin D with immune/bone health), but the specific combination and doses in this product have not been tested together in an outcomes trial. The largest relevant RCT (VITAL) used different doses of both nutrients and found no significant reduction in its primary cardiovascular or cancer endpoints, though it recorded some secondary benefits (see evidence_registry). The claim is broadly directionally supported at the ingredient level but overstates what has been demonstrated for this exact formulation and dose.
Vendor source
Supported
“2X the omega-3 concentration of standard fish oil in a smaller number of softgels”
This is a straightforward, verifiable formulation claim: at 2150 mg total omega-3s per 2-softgel serving, this concentrate is roughly double the omega-3 content per softgel of many standard 1000 mg fish-oil capsules, consistent with independently reported label data from GNC and other retailers.
Vendor source
Partial support
“Convenient way to get a full day's vitamin D3 alongside omega-3s”
1000 IU is a reasonable maintenance dose for vitamin D-sufficient adults and is 125% of the US Daily Value, but published deficiency-correction trials indicate 1000 IU/day is often inadequate to correct an existing vitamin D deficiency compared to 5000 IU/day regimens (see evidence_registry, Modi et al. 2016). Consumers who are diagnosed as deficient should not assume this product's D3 dose is sufficient on its own without retesting blood levels.
Vendor source
Partial support
“Highest quality, freshest fish oil available (implied by brand-level freshness/purity marketing)”
The base Ultimate Omega oil has independently verified strong freshness and purity data via IFOS certification and historical Consumer Reports/company-published contaminant testing, but no independent lab data specific to the D3-combination SKU (as opposed to the base oil) was located in this research pass, and 'highest quality available' is an unverifiable superlative relative to every competing brand on the market.
Vendor source

Regulatory status

Rules change often. We record when we last verified each row. See the full regulatory timeline →

What we could not verify

We list this openly. If a claim isn't backed by a source we can trace, we'd rather flag it than repeat it.

  • No published clinical trial exists on this exact combination product (Ultimate Omega fish-oil concentrate plus 1000 IU vitamin D3 in a single softgel) or on this specific dose pairing; all supporting evidence is drawn from separate-ingredient trials (omega-3 alone, vitamin D alone, or the VITAL trial's different-dose combination).
  • No IFOS or other independent third-party lab certificate specific to the D3-added SKU (as distinct from the base, non-D3 Ultimate Omega oil) was located; freshness/purity data cited here applies to the base fish-oil concentrate.
  • The exact current vitamin D3 raw-material source/manufacturer (e.g., whether from lanolin-derived cholecalciferol) is not disclosed on the consumer label beyond 'vitamin D3 (cholecalciferol) in olive oil.'
  • No brand-published information confirms whether batch-specific Certificates of Analysis for this specific SKU are searchable via Nordic's public COA lookup tool at the time of this review, versus only for single-ingredient SKUs.
  • Independent, product-specific Trustpilot or ConsumerLab review data for this exact D3-combination SKU (as opposed to brand-level or base Ultimate Omega data) was not located.
  • Trustpilot aggregator
    4 reviews

    This is a brand-level customer-service profile for nordic-naturals; it does not isolate Ultimate Omega-D3 2X.

    verified 2026-08-07Open source →
  • Reddit r/Supplements community forum
    mixed sentiment

    Community discussion exists, with cost and value being the dominant concern despite some praise for its high omega-3 dose and EPA/DHA balance. No single Reddit thread is treated as a representative product review.

    no direct URLchecked 2026-08-07
Important to know
Omega-3 (EPA/DHA)Ethyl ester (cheaper) absorbs worse than triglyceride form unless taken with fatty meal. Check third-party oxidation testing (TOTOX <10).
Vitamin D3Taking without fat = poor absorption. High-dose D3 without K2 can drive calcium into arteries. D2 form (ergocalciferol) is inferior for raising blood levels.
Vitamin D3High doses (>4000 IU/day) may cause hypercalcemia. Do not exceed upper intake limits without medical supervision.

Editorial notes

The consumer-line equivalent of the practitioner-only ProOmega 2000-D, same 2150 mg omega-3 potency as Ultimate Omega 2X plus 1000 IU vitamin D3 in one softgel serving, priced around $55.95 for 60 count. Source: Anchovy, sardine from Peru, South Pacific (wild-caught) FOS certified. Form: rTG. antioxidant: D-alpha tocopherol + rosemary; capsule: gelatin. Consumer sentiment (mixed): Users describe quality and perceived benefits; price and occasional GI effects are main complaints. Evidence reviewed: 2026-08-07; refresh due: 2027-02-07.

Verification layer

Every claim on this page carries a verification stamp. We track how many independent source types confirm each fact, and when we last checked. Evidence reviewed: 2026-08-07; refresh due: 2027-02-07.

Overall verification

Well-verified on lab quality and sourcing, with broad consumer consensus.

Source cross-validated
Cross-checked · 2 sources
Species and region: Anchovy, sardine from Peru, South Pacific (wild-caught) FOS certified
Friend of the Sea certification confirmed
Batch lab-validated
Lab-validated · 1 source
IFOS batch report confirms EPA/DHA content, TOTOX, and contaminant levels
Repeated consumer theme
Repeated theme · 1 source
Same tolerability, complaint, or praise pattern found across multiple public consumer discussions
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Where this sits

Actives inside
Omega-3 (EPA/DHA)Vitamin D3
Category
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Ranking
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Brand
Nordic Naturals profile →
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Brand owners

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Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 8.8/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

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Same maker

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Brand profile →
Nordic Naturals
Ultimate Omega
Omega
EPA and DHA per serving
EPA 650 mg · DHA 450 mgSoftgel · 60 servings
Price per serving
$0.75$45.00 · 60 servings
Testing
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Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 8.8/10

Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.

100%
of trial dose
$1.17
per research-dose day, not label serving
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Cognition
Active per serving
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Testing
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EPA/DHA split not stored

Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Score & research context 8.5/10

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