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Jarrow Formulas

Jarrow Formulas trans-Pterostilbene, 50 mg

Sirtuin activator · Capsule · 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.

Active per serving
Pterostilbene 50 mg
Form
Capsule
List price (catalog, USD)
$35.99
Price per serving
$0.60List price divided by servings per container. A per-day cost only if the label serving is once daily.
Full label record: servings, testing, ingredients
Servings per container
60
Catalog monthly estimate
$18.00
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
Pterostilbene50 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.

4.7/10
Overall score
#16 / 17 in Sirtuin activator

See the score breakdown below.

Read the evidence (1 study)
Add to compareVisit brand site →
Watch out
Tier 5
Mechanistic / animal / marketing
Only mechanistic studies or marketing claims. No human RCT for this ingredient.
How we scored this product Show the full breakdown
Dose vs. studies (50%) Why 3.6 of 10. Primary ingredient is Pterostilbene (evidence grade D). It delivers 50 mg, inside the studied range of 50–250 mg. Read the rule → 3.6
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 8.4 of 10. One day at the trial dose costs about $1.20. That is cheaper than average (131 of 313 by cost per effective day). Read the rule → 8.4
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 6.8 of 10. No external reviews found, so community sentiment defaults to neutral. Community never counts as clinical evidence. Read the rule → 6.8
Composite How this 4.7 is built. 0.50 × 3.6 + 0.20 × 5.0 + 0.10 × 8.4 + 0.10 × 5.0 + 0.05 × 5.0 + 0.05 × 6.8 = 4.7 out of 10. Safety caps applied after. 4.7
4.7 composite
Dose vs. studies50%3.6
Transparency20%5.0
Value10%8.4
Formulation10%5.0
Safety5%5.0
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

4.7 / 10
Best for
Full trial dose, Budget-friendly
Avoid if
No public lab certificate
Full-dose status
Meets trial dose
Price/month
$18
COA status
Not public
Biggest caveat
Dose-evidence score of 3.6 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: $35.99
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 trans-Pterostilbene, 50 mg scores 4.7, making it among the lowest-scoring products we track. It delivers 50mg of Pterostilbene, inside the studied range of 50–250mg with grade D evidence (very early-stage, mostly animal models). The quality transparency (5.0) is limited by the lack of third-party testing.

What drives the score up

  • Overall score of 4.7 with no single dominant strength.

What drags it down

  • Dose-evidence score of 3.6 is below average for the site.
  • No third-party testing, which caps the quality transparency.
  • Quality transparency of 5.0 is below the site average.

Why you'd choose it

  • You want a reasonably priced sirtuin activator product.

Why you might skip it

  • You want third-party verified purity.
  • You want a product with a publicly available CoA.
  • You want better value (this is $1.20/day with a value score of 8.4).
Question 1

Does the molecule work?

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

Pterostilbene

Resveratrol's more bioavailable cousin, mostly used in blends.

1 landmark RCT · US: Dietary supplement · EU: Food supplement
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
$1.20/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
6 reviews across platforms · 3.0/5 · 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.

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.

Pterostilbene50 mgEvidence D

Resveratrol's more bioavailable cousin, mostly used in blends.

Read about Pterostilbene →
Layer 3 · Evidence vault

Product data & verification

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

The numbers

Price
$36
per bottle · 60 servings
Dose vs. research
of trial dose 100%
of published effective dose
$ / day at studied dose
$1.20
what one effective daily dose costs
$ / g active
$12.00
per gram of active substance
Independently checked

Data verification

COA status
Not public
Evidence grade
D
Per-ingredient breakdown
DPterostilbene

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
Pterostilbene
Resveratrol's more bioavailable cousin, mostly used in blends.
Riche et al. 2013
50 mg 50% of trial dose
100 mg
3.2 /5
Medium confidence
6 reviews across 2 platforms (2 sources)
Source diversity: 46%
TrustpilotiHerb
PraiseHigh-quality ingredientsEasy-to-take small capsules with no aftertaste
Last checked: 2026-08-20

Consumer signals

3.0 out of 5 across 6 verified reviews on 2 platforms.

Medium confidence

Auto-gathered from public review platforms via pplx_sdk fetch.

iHerb

positive sentiment

PraiseHigh-quality ingredientsEasy-to-take small capsules with no aftertasteGentle on the stomachPerceived bioavailability advantage over resveratrol
Themes

iHerb reviewers praise Jarrow's trans-Pterostilbene for convenient dosing and perceived superior bioavailability compared to resveratrol, with reports of mild energy and well-being boosts.

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

Trustpilot

6 reviews · 3.0/5

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.

PterostilbeneRiche et al. 2013
Important to know
PterostilbeneHigh-dose pterostilbene can raise LDL. Keep to <150 mg/day unless working with a clinician.

Editorial notes

A standard 50mg trans-pterostilbene capsule sourced from Pterocarpus marsupium (Silbinol) rather than the more common blueberry-derived pTeroPure used by some competitors, dose is in line with market norms; price is on the higher end for a 60-count single-ingredient SKU.

Go deeper

Where this sits

Actives inside
Pterostilbene
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 trans-Pterostilbene, 50 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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