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Jarrow Formulas

Jarrow Formulas Resveratrol Synergy, 200 mg

Sirtuin activator · Tablet · 60 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.

Ingredients listed
4 ingredients listed largest listed: Resveratrol 200 mg
Form
Tablet
List price (catalog, USD)
$28.21
Price per serving
$0.47List 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.
  • Vitamin amounts shown in µg/mg. Labels may use IU.
Full label record: servings, testing, ingredients
Servings per container
60
Testing disclosure
No third-party testing listedStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Ingredients as listed

IngredientAmount per serving
Resveratrol200 mg
Vitamin C100 mg
EGCG200 mg
Quercetin100 mg

What to check on the label

  • Whether the label says trans-resveratrol with a purity percentage, or only 'resveratrol' or 'Japanese knotweed extract'.
  • Whether the milligrams refer to the compound or to the extract it comes from.
  • Powders list a scoop size. Check that it matches the serving in the catalog.

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.

4.8/10
Overall score
#13 / 17 in Sirtuin activator

See the score breakdown below.

Read the evidence (3 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 3 supporting studies
How we scored this product Show the full breakdown
Dose vs. studies (50%) Why 5.3 of 10. Primary ingredient is Resveratrol (evidence grade C). It delivers 200 mg, inside the studied range of 150–1000 mg. Read the rule → 5.3
Transparency (20%) Why 5.0 of 10. Earned points for all doses disclosed. Lost points for no public certificate of analysis and no independent third-party testing. Read the rule → 5.0
Value (10%) Why 8.5 of 10. One day at the trial dose costs about $1.18. That is cheaper than average (130 of 313 by cost per effective day). Read the rule → 8.5
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 5.0 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 → 5.0
Community sentiment (5%) Why 7.0 of 10. No external reviews found, so community sentiment defaults to neutral. Community never counts as clinical evidence. Read the rule → 7.0
Composite How this 4.8 is built. 0.50 × 5.3 + 0.20 × 5.0 + 0.10 × 8.5 + 0.10 × 5.0 + 0.05 × 5.0 + 0.05 × 7.0 = 4.8 out of 10. Safety caps applied after. 4.8
4.8 composite
Dose vs. studies50%5.3
Transparency20%5.0
Value10%8.5
Formulation10%5.0
Safety5%5.0
Community5%7.0

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

4.8 / 10
Best for
Full trial dose
Avoid if
No public lab certificate
Full-dose status
Meets trial dose
Price/month
$0
COA status
Not public
Biggest caveat
Dose-evidence score of 5.3 is below average for the site.
Nearest alternatives
Catalog snapshot. Check linked sources for current price, label and batch-specific testing.
Price verification
Current price: $28.21
Last price check: Sep 01, 2026
Add to compareVisit brand site →
Layer 2 · Context
In plain language

Why this scored this way

This Jarrow Formulas Jarrow Formulas Resveratrol Synergy, 200 mg scores 5.6, making it below the site average. It delivers 100mg of Vitamin C, 50% of the studied range low edge (200mg) with grade A evidence (strong human trial data). The quality transparency (5.0) is limited by the lack of third-party testing.

What drives the score up

  • Vitamin C has grade A evidence and is dosed at 50% of the trial dose.

What drags it down

  • Dose-evidence score of 5.3 is below average for the site.
  • Resveratrol (200.0mg is 40% of the 500mg trial dose) is significantly under-dosed.
  • Vitamin C (100.0mg is 20% of the 500mg trial dose) is significantly under-dosed.
  • Quercetin (100.0mg is 20% of the 500mg trial dose) is significantly under-dosed.
  • No third-party testing, which caps the quality transparency.

Why you'd choose it

  • You want a reasonably priced sirtuin activator product.
  • You want Vitamin C from a Jarrow Formulas product.

Why you might skip it

  • You want third-party verified purity.
  • You want a product with a publicly available CoA.
  • You need a full trial dose of resveratrol (this product under-doses it).
Question 1

Does the molecule work?

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

Resveratrol

The famous red-wine molecule; longevity claims have outrun the human evidence.

3 landmark RCTs · US: Dietary supplement · EU: Authorised Novel Food (2016/1866)
Vitamin C

Correcting deficiency is important; megadoses rarely add benefit.

4 landmark RCTs · US: Dietary supplement · EU: Food supplement
EGCG

Green tea's active catechin; liver safety caution at high doses.

1 landmark RCT · US: Dietary supplement · EU: Regulated: hepatotoxicity warning ≥800 mg/day
Quercetin

Best-studied 'senolytic' ingredient, though evidence is early.

4 landmark RCTs · US: Dietary supplement · EU: Food supplement (extract-dependent)

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
Resveratrol200 mg500 mg40%C
Vitamin C100 mg500 mg20%A
EGCG200 mg300 mg67%C
Quercetin100 mg500 mg20%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
$1.18/day at trial dose
What one effective daily dose actually costs
Transparency
5.0/10 · No public lab certificate
No third-party testing disclosed
Consumer signals
No consumer signals collected yet
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
resveratrol: CYP3A4 interactions
Safety flag
resveratrol: CYP3A4 interactions
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.
No third-party testing
Independent lab verification not disclosed
The brand does not publish evidence of independent batch testing.
Plain English

What’s inside

The main ingredients of this product, in plain language.

Resveratrol200 mgEvidence C

The famous red-wine molecule; longevity claims have outrun the human evidence.

Read about Resveratrol →
Vitamin C100 mgEvidence A

Correcting deficiency is important; megadoses rarely add benefit.

Read about Vitamin C →
EGCG200 mgEvidence C

Green tea's active catechin; liver safety caution at high doses.

Read about EGCG →
Quercetin100 mgEvidence B

Best-studied 'senolytic' ingredient, though evidence is early.

Read about Quercetin →
Layer 3 · Evidence vault

Product data & verification

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

The numbers

Price
$28
per bottle · 60 servings
Dose vs. research
of trial dose 100%
of published effective dose
$ / day at studied dose
$1.18
what one effective daily dose costs
$ / g active
$0.78
per gram of active substance
Independently checked

Data verification

COA status
Not public
Evidence grade
CACB
Per-ingredient breakdown
CResveratrol
AVitamin C
CEGCG
BQuercetin

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
Resveratrol
The famous red-wine molecule; longevity claims have outrun the human evidence.
Timmers et al. 2011 (Cell Metabolism)RESHAW 2020Lozupone 2026 (Expert Opin Investig Drugs)
200 mg 40% of trial dose
500 mg
100 mg 20% of trial dose
500 mg
EGCG
Green tea's active catechin; liver safety caution at high doses.
EFSA 2018
200 mg 67% of trial dose
300 mg
100 mg 20% of trial dose
500 mg
3.5 /5
High confidence
1,957 reviews across 3 platforms (4 sources)
Source diversity: 77%
AmazonTrustpilotiHerb
Praise20mg dose considered appropriate by reviewersPerceived anti-inflammatory and antioxidant effects
Last checked: 2026-08-20

Consumer signals

Consumer signals gathered from 4 platforms.

Medium confidence
iHerb

4 reviews · positive sentiment

Praise20mg dose considered appropriate by reviewersPerceived anti-inflammatory and antioxidant effectsReported increased adiponectin
Themes

iHerb reviewers of Jarrow Resveratrol Synergy appreciate the moderate dosing and report perceived anti-inflammatory benefits, including use during cancer treatment support regimens.

Compiled from a iHerb listing located during research; verified at build time.

Trustpilot

6 reviews · 3.0/5

Amazon

1,941 reviews

Same brand profile on Trustpilot country sites: Canada 4.0.

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.

ResveratrolTimmers et al. 2011 (Cell Metabolism)
ResveratrolRESHAW 2020
ResveratrolLozupone 2026 (Expert Opin Investig Drugs)
Vitamin CVitamin C umbrella review 2022 (76 meta-analyses)
Vitamin CVitamin C + telomere length 2023 (NHANES)
Vitamin CVitamin C and CVD 2020 (Antioxidants)
Vitamin CCochrane: Vitamin C for common cold
EGCGEFSA 2018
QuercetinHickson et al. 2019 (senolytics in humans)
QuercetinQuercetin + blood pressure 2016 meta-analysis
QuercetinQuercetin + blood pressure 2022 meta-analysis
QuercetinD+Q pilot trial 2025 (F1000Research)
Important to know
Resveratrol"Resveratrol" products that don't specify trans-isomer content are unmeasurable in practice. Cis-resveratrol is biologically inactive.
Vitamin CHigh doses cause GI upset. Buffered forms gentler. Liposomal marketing typically overstated for chronic use.
EGCGTake with food. Avoid on empty stomach. EU restricts high-dose products.
QuercetinPlain quercetin dihydrate has poor absorption. Phytosome forms deliver 10 to 20× more into blood.

Editorial notes

A resveratrol-plus-cofactor blend (green tea, quercetin, vitamin C) rather than an isolated high-dose resveratrol, good synergy story, but the 200mg headline dose is diluted across several actives, so it's not comparable dose-for-dose to single-ingredient resveratrol products.

Go deeper

Where this sits

Actives inside
ResveratrolVitamin CEGCGQuercetin
Category
See all in Sirtuin activator →
Brand
Jarrow Formulas profile →
Add to compare Visit brand site →
Brand owners

Spot an error?

If you are the manufacturer or brand owner of Jarrow Formulas Resveratrol Synergy, 200 mg 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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