Resveratrol vs Pterostilbene: What Differs and What Is Known
Pterostilbene is a close chemical cousin of resveratrol. Animal studies show better absorption, but human comparisons are missing; see what trials and safety sources show.
Content last updated . This page has not been medically reviewed.
Quick answer
Resveratrol and pterostilbene are closely related plant compounds. Pterostilbene is the dimethylether analog of resveratrol, meaning it has two extra methyl groups in its structure. [1] In rats, pterostilbene was far better absorbed. In people, resveratrol is poorly available to the body, and we found no human trial that compared the two directly on absorption or on any health outcome. Better absorption in animals does not prove better health effects. Neither has been shown to extend life or prevent disease in people. This page is information only.
What each one is
Resveratrol is a polyphenol found in grape skins, peanuts and some berries, and sold as a supplement. [2] Memorial Sloan Kettering Cancer Center (US) notes that its anti-aging marketing rests on findings that it prolongs the life span of yeast cells, an effect not yet demonstrated in humans. [2] Both compounds are often called antioxidants. That is a test-tube label; it does not tell you what a supplement does in a person.Evidence labels used here: preclinical (animals or cells), biomarker only, insufficient evidence, mixed, marketing claim, and "Proper evidence not found" where we searched and found nothing usable.
Side by side
| Question | Resveratrol | Pterostilbene | Strength |
|---|---|---|---|
| Absorption in animals | About 20% bioavailable in rats | About 80% bioavailable in rats; higher blood levels of the parent compound [1] | Preclinical; equimolar oral dosing for 14 days |
| Absorption in people | Oral absorption about 75%, but extensive metabolism in gut and liver leaves oral bioavailability well under 1% [3] | Proper evidence not found for a human absorption study | Resveratrol: review of human data |
| Head-to-head human comparison | Proper evidence not found | Proper evidence not found | n/a |
| Blood sugar (type 2 diabetes) | Cochrane review: three small trials (50 people), neutral effect on HbA1c over 4 to 5 weeks [4] | Proper evidence not found | Resveratrol: very low certainty |
| Cholesterol and blood pressure | Not compared here; see linked pages | One 6 to 8 week trial in 80 adults with raised cholesterol: LDL rose and blood pressure fell on a higher amount [5] | Pterostilbene: one small trial; mixed signal |
| Safety in healthy volunteers | GI upset at high amounts [2] | A 12-week pilot in 30 healthy men reported no adverse events [6] | Pterostilbene: very small, short |
The animal comparison used matched molar amounts by mouth for 14 days, and the authors suggested pterostilbene's biological activity may be greater at equal doses. [1] That is a prediction from blood levels in rats.
What the human trials say
- Pterostilbene (cholesterol and blood pressure). In 80 adults with total cholesterol of at least 200 mg/dL or LDL of at least 100 mg/dL, LDL rose by 17.1 mg/dL on pterostilbene alone, and blood pressure fell (systolic by 7.8 mmHg, diastolic by 7.3 mmHg) on the higher study amount of 125 mg twice a day. [5] The authors noted that being on a cholesterol medicine seemed to reduce the LDL effect. [5] A rising LDL is the opposite of what a heart-health claim would want. This is a single small trial.
- Pterostilbene (safety pilot). In a 12-week trial of 30 healthy men at 10 or 100 mg a day, no adverse events were reported. The main results were blood microRNA measures, a biomarker, not a health outcome. [6] The authors include a food-company researcher.
- Resveratrol. A literature review says results from human trials have been controversial. [7] The Cochrane diabetes review found neutral effects on HbA1c from three short trials. [4] For the fuller picture see resveratrol evidence for heart, blood sugar and aging claims and resveratrol and longevity research.
- Mixed products. Several pterostilbene trials in our PubMed search combined it with nicotinamide riboside. Those cannot show what pterostilbene alone does; see NAD, NMN, resveratrol and longevity claims.
We searched PubMed on 2026-10-23 for "pterostilbene humans randomized", "pterostilbene resveratrol bioavailability comparison" and "pterostilbene safety human".
Frequently asked questions
Is pterostilbene better absorbed than resveratrol?
In rats, yes: about 80% versus 20% bioavailable. [1] Proper evidence not found for a human comparison.
Does better absorption mean better results?
Not shown. Absorption is a blood-level measure, and no head-to-head human health outcome trial was found.
Does pterostilbene lower cholesterol?
In one 80-adult trial, LDL rose rather than fell, while blood pressure fell on the higher amount. [5]
Does resveratrol help people live longer?
The anti-aging claim rests on yeast findings and has not been demonstrated in humans, according to MSK. [2]
Are there medicine interactions?
Resveratrol may affect liver enzymes and bleeding risk, so ask a pharmacist; pterostilbene interaction data were not found. [2]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Safety, interactions and who should ask first
- Resveratrol and medicines. MSK reports that resveratrol inhibits platelet clumping in laboratory tests, so use with antiplatelet drugs may raise bleeding risk, and that in healthy volunteers taking 1 gram a day for 4 weeks it inhibited the liver enzymes CYP3A4, 2D6 and 2C9 and induced 1A2, which can change levels of drugs those enzymes handle. [2] A literature review notes data on interactions with other therapies are still lacking. [7] Review any supplement with a pharmacist: medication interactions.
- Pterostilbene and medicines. Proper evidence not found in the sources we read. Because it is a close relative of resveratrol, ask a pharmacist, but do not assume the same interactions apply.
- Hormone-sensitive cancers. MSK advises caution with resveratrol because it has estrogen-like effects in laboratory studies. [2]
- Kidney. A high-dose micronized resveratrol study in people with multiple myeloma was stopped because of serious adverse events including kidney failure. [2] That was a special formulation in people with cancer, but it is a reason for people with kidney disease to ask first.
- Pregnancy, breastfeeding, children, liver disease. Not described in the sources we read for either compound, so no safety claim is made: pregnancy and breastfeeding.
- Before surgery. Because of the possible bleeding effect, tell the care team about resveratrol: supplements before surgery.
- Official intake levels. None of the sources we read gives an official recommended intake or upper limit for either compound, so none is stated.
- Quality. Contents vary between products; see quality testing.
Background reading: polyphenols, quercetin and resveratrol and resveratrol side effects.
References
- Kapetanovic IM, Muzzio M, Huang Z, Thompson TN, McCormick DL. Pharmacokinetics, oral bioavailability, and metabolic profile of resveratrol and its dimethylether analog, pterostilbene, in rats. Cancer Chemother Pharmacol 2011 (PubMed abstract). Read 2026-10-23.
- Memorial Sloan Kettering Cancer Center. Resveratrol. Page last updated 17 February 2023. Read 2026-10-23.
- Walle T. Bioavailability of resveratrol. Ann N Y Acad Sci 2011 (PubMed abstract). Read 2026-10-23.
- Jeyaraman MM, Al-Yousif NSH, Singh Mann A, et al. Resveratrol for adults with type 2 diabetes mellitus. Cochrane Database Syst Rev 2020 (PubMed abstract). Read 2026-10-23.
- Riche DM, Riche KD, Blackshear CT, et al. Pterostilbene on metabolic parameters: a randomized, double-blind, and placebo-controlled trial. Evid Based Complement Alternat Med 2014 (PubMed abstract). Read 2026-10-23.
- Otsuka K, Kuriki D, Kamachi K, Tanaka A, Matsuoka R. Analysis of the effects of short-term pterostilbene intake on healthy participants: a pilot study. J Nutr Sci Vitaminol 2025 (PubMed abstract). Read 2026-10-23.
- Shaito A, Posadino AM, Younes N, et al. Potential adverse effects of resveratrol: a literature review. Int J Mol Sci 2020 (PubMed abstract). Read 2026-10-23.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.