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AG1 (Athletic Greens)

AG Vitamin D3+K2

Longevity stack · Liquid drops · 600 servings
Editorial noteListed for comparison and skepticism, not as a NO1GEVITY recommendation. See the AG1 brand page for the full editorial concerns (FDA adverse-event reports under investigation, proprietary-blend transparency, paid-ambassador financial ties).

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.

Ingredients listed
2 ingredients listed largest listed: Vitamin K2 100 µg
Form
Liquid drops
List price (catalog, USD)
$29.00
Price per serving
$0.05Daily use may exceed one serving. List price divided by servings per container. A per-day cost only if the label serving is once daily.

Reading notes

  • Multi-ingredient product. Amounts are per ingredient per serving; the product is assessed as one bundle, not as a recommendation for each ingredient.
  • The catalog monthly estimate ($29.00) does not equal list price ÷ servings × 30 ($1.45), so the label's daily use likely differs from one serving.
  • Vitamin amounts shown in µg/mg. Labels may use IU.
Full label record: servings, testing, ingredients
Servings per container
600
Serving size (label)
0.05 g
Catalog monthly estimate
$29.00Daily use may exceed one serving
Testing disclosure
Brand lists third-party testing; no public lab certificate listedStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Ingredients as listed

IngredientAmount per serving
Vitamin D325 µg
Vitamin K2100 µg

What to check on the label

  • Whether every ingredient has its own milligram line, or several are grouped in a 'blend' with one total.
  • How many capsules or scoops make a serving, and how many servings the container holds.
  • Whether the ingredients you care about appear at amounts you would accept on their own. The list below shows each figure.

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.

7.0/10
Overall score
#1 / 16 in Longevity stack

Full trial dose, tested by independent lab, top 1% value.

Read the evidence (2 studies)
Add to compareVisit brand site →
Watch out
Tier 3
Ingredient RCT (matching dose)
The ingredient was tested in an RCT at the same dose this product sells.
See the 2 supporting studies
How we scored this product Show the full breakdown
Dose vs. studies (50%) Why 8.7 of 10. Primary ingredient is Vitamin D3 (evidence grade A). It delivers 0 mg, above the studied range of 0–0 mg. Above the range docks the score because nobody has tested that much. Read the rule → 8.7
Transparency (20%) Why 6.0 of 10. Earned points for independent third-party testing and all doses disclosed. Lost points for no public certificate of analysis. Read the rule → 6.0
Value (10%) Why 10.0 of 10. One day at the trial dose costs about $0.10. That is one of the cheaper options in the catalog (12 of 313 by cost per effective day). Read the rule → 10.0
Formulation (10%) Why 5.0 of 10. No published absorption advantage or disadvantage on file. The default of 5 is not a criticism. Read the rule → 5.0 Default. No absorption data on file.
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 7.2 of 10. No external reviews found, so community sentiment defaults to neutral. Community never counts as clinical evidence. Read the rule → 7.2
Composite How this 7.0 is built. 0.50 × 8.7 + 0.20 × 6.0 + 0.10 × 10.0 + 0.10 × 5.0 + 0.05 × 8.5 + 0.05 × 7.2 = 7.0 out of 10. Safety caps applied after. 7.0
7.0 composite
Dose vs. studies50%8.7
Transparency20%6.0
Value10%10.0
Formulation10%5.0
Safety5%8.5
Community5%7.2

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

7.0 / 10
Best for
Full trial dose, Budget-friendly
Avoid if
No public lab certificate
Full-dose status
Meets trial dose
Price/month
$29
COA status
Not public
Biggest caveat
No public lab certificate available for independent verification.
Nearest alternatives
Catalog snapshot. Check linked sources for current price, label and batch-specific testing.
Price verification
Current price: $29.00
Last price check: Sep 01, 2026
Add to compareVisit brand site →
Layer 2 · Context
In plain language

Why this scored this way

This AG1 (Athletic Greens) AG Vitamin D3+K2 scores 7.8, making it a strong scorer. It delivers 0mg of Vitamin D3, inside the studied range of 0–0mg with grade A evidence (strong human trial data). At $0.10/day it's priced well for what you get.

What drives the score up

  • Dose-evidence score of 8.7 reflects good alignment with trial doses.
  • Value score of 10.0 at $0.10/day.
  • Vitamin D3 is dosed at the full research level with grade A evidence (strong human trial data).
  • Vitamin K2 is dosed at the full research level with grade B evidence (promising human data, not yet comprehensive).
  • Vitamin K2 is also dosed at the full research level.

What drags it down

  • No public lab certificate available for independent verification.
  • Quality transparency of 6.0 is below the site average.

Why you'd choose it

  • You want good value at $0.10/day.
  • You want Vitamin D3 from a AG1 (Athletic Greens) product.
  • You want a tested by independent lab product.

Why you might skip it

  • You want a product with a publicly available CoA.
  • You want stronger transparency (this scores 6.0).
Question 1

Does the molecule work?

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

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)
Vitamin K2

Vitamin D3's essential partner, directs calcium to bones instead of arteries.

1 landmark RCT · US: Dietary supplement · EU: Food supplement, health claims authorised

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
Vitamin D30.025 mg0.05 mg50%A
Vitamin K20.1 mg0.18 mg56%B

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
$0.10/day at trial dose
What one effective daily dose actually costs
Transparency
6.0/10 · No public lab certificate
Independent batch testing confirmed
Consumer signals
8,732 reviews across platforms · 3.6/5 · 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
vitamin k2: warfarin/anticoagulant interaction
Safety flag
vitamin k2: warfarin/anticoagulant interaction
Dose or interaction risk detected. See ingredient page for details.
No public lab certificate
Certificate of Analysis not published
Without a public lab certificate, batch purity and potency cannot be independently verified.
Buyer complaints
Amazon: Some users note the product is only available to AG1 members, not sold standalone on Amazon. Price at $29 for 600 servings is considered reasonable per drop but requires AG1 subscription.; Reddit: Requires AG1 membership to purchase. Some users question the value of buying D3+K2 separately when many multivitamins include them.
Recurring themes from consumer review platforms.
Plain English

What’s inside

The main ingredients of this product, in plain language.

Vitamin D30.025 mgEvidence A

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

Read about Vitamin D3 →
Vitamin K20.1 mgEvidence B

Vitamin D3's essential partner, directs calcium to bones instead of arteries.

Read about Vitamin K2 →
Layer 3 · Evidence vault

Product data & verification

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

The numbers

Price
$29
per bottle · 600 servings
Dose vs. research
of trial dose 100%
of published effective dose
$ / day at studied dose
$0.10
what one effective daily dose costs
$ / g active
$386.67
per gram of active substance
Independently checked

Data verification

COA status
Not public
Evidence grade
AB
Per-ingredient breakdown
AVitamin D3
BVitamin K2

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
Vitamin D3
Cheap, safe, and correcting a deficiency you probably have.
VITAL Trial 2018
0.025 mg 50% of trial dose
0.05 mg
Vitamin K2
Vitamin D3's essential partner, directs calcium to bones instead of arteries.
Knapen et al. 2013 (Thromb Haemost)
0.1 mg 56% of trial dose
0.18 mg
3.6 /5
High confidence
8,732 reviews across 3 platforms (3 sources)
Source diversity: 69%
AmazonRedditTrustpilot
PraiseConvenient liquid drop format. Users appreciate the 600 servings per bottle and Users appreciate the MK4+MK7 combination and lichen-sourced D3. Convenient dosin
ComplaintsSome users note the product is only available to AG1 members, not sold standalonRequires AG1 membership to purchase. Some users question the value of buying D3+
Last checked: 2026-08-20

Consumer signals

3.6 out of 5 across 8,732 verified reviews on 3 platforms.

Medium confidence

Auto-gathered from public review platforms via pplx_sdk fetch.

Amazon

neutral sentiment

Praise

Convenient liquid drop format. Users appreciate the 600 servings per bottle and the ability to adjust dose. NSF Certified for Sport is a key trust signal.

Complaints

Some users note the product is only available to AG1 members, not sold standalone on Amazon. Price at $29 for 600 servings is considered reasonable per drop but requires AG1 subscription.

Themes

Contains both MK4 and MK7 forms of vitamin K2, which is uncommon in D3+K2 supplements. Uses lichen-sourced D3 (vegan).

Amazon listing exists (ASIN B0CPBL4538) but is currently unavailable for direct purchase. Reviews limited. Product is primarily sold via drinkag1.com membership. Verified 2026-08-07.

Reddit

1 thread discussed · neutral sentiment

Praise

Users appreciate the MK4+MK7 combination and lichen-sourced D3. Convenient dosing with the dropper format.

Complaints

Requires AG1 membership to purchase. Some users question the value of buying D3+K2 separately when many multivitamins include them.

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

Trustpilot

8,732 reviews · 3.6/5 · mixed sentiment

Praise

Brand-level: AG1 has 3.6/5 on Trustpilot across 8732 reviews. Praise centers on product quality, NSF certification, and taste. Users report improved energy and gut health from the AG1 system.

Complaints

Brand-level complaints focus on subscription difficulty, customer service responsiveness, price ($79-99/mo for AG1), and marketing intensity. Some users find it overpriced relative to individual supplements.

Trustpilot rating is brand-level (AG1/ Athletic Greens), not specific to D3+K2 product. Verified 2026-08-07 at https://www.trustpilot.com/review/drinkag1.com.

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

What others say (unverified)

No external reviews aggregated yet for this product.

Layer 3 · Evidence vault

Evidence, claims & regulation

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

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.

Vitamin D3VITAL Trial 2018
Vitamin K2Knapen et al. 2013 (Thromb Haemost)
Important to know
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.
Vitamin K2Interacts with blood thinners (warfarin), consult your doctor. All-trans MK-7 is the active form; cis-MK-7 is inactive filler.

Editorial notes

NSF Certified for Sport. Liquid drops with 600 servings per bottle. Vitamin D3 from lichen, K2 as MK4+MK7. Exclusively available to AG1 members. Very low cost per serving at $0.05.

Go deeper

Where this sits

Actives inside
Vitamin D3Vitamin K2
Category
See all in Longevity stack →
Brand
AG1 (Athletic Greens) profile →
Add to compare Visit brand site →
Brand owners

Spot an error?

If you are the manufacturer or brand owner of AG Vitamin D3+K2 and believe any data on this page is incorrect (wrong dose, wrong ingredient, wrong price, missing certification, outdated status), you can request a correction.

We review every request, verify it against primary sources, and publish any accepted change with a dated note. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.

Request a correction →
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