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Resveratrol explained: what it is and food sources

Resveratrol comes from plants and occurs in red grape skins, other fruits and red wine. The NIH says it has antioxidant effects and stimulates the body's production of antioxidant enzymes. Two products we reviewed list resveratrol, and both labels print the amount: 12 mg to 20 mg per serving.

By HowNook's Health desk · Updated

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In the products we reviewed
2, every label prints the amount

What resveratrol is

  • Resveratrol comes from plants and is found in high concentrations in red grape skins and other fruits.2
  • Resveratrol occurs in many plant species and in red wine.1
  • Resveratrol has antioxidant effects and stimulates the body's production of antioxidant enzymes.2
  • Resveratrol exists in two forms called trans and cis, and most resveratrol in the blood is in a chemically modified form.2
  • Resveratrol is sold without a prescription as a supplement in different preparations and doses.2
  • Only a limited amount of resveratrol taken by mouth becomes available to the body, and commercial product purity is rarely clearly defined.2
  • Resveratrol supplements usually contain hundreds of times the amounts found in wine or other foods.1

Foods that have it2

  • Red grape skins
  • Mulberries
  • Blueberries
  • Blackberries

How much resveratrol each product gives

Per serving, as each label prints it
FitSpresso20 mg
VitaliSlim12 mg

Before you take it

If you take medicines

Estrogens
Resveratrol may interact with estrogens.2

Ask a doctor first

  • The safety of resveratrol supplements during breastfeeding is not established.1
  • It is probably best to avoid red wine as a source of resveratrol while breastfeeding.1

These statements have not been evaluated by the FDA. A supplement is not a medicine.

The 2 products we reviewed that list resveratrol

ProductForm and servingResveratrol per servingOur scorePrice a bottleBuy
FitSpresso#2 in weight loss supportCapsules1 capsule20 mg9.5$39Check price
VitaliSlim#4 in weight loss supportCapsules1 capsule12 mg9.2$49Check price
Prices checked Oct 5, 2026

Questions people ask

What foods contain resveratrol?

Red grape skins, mulberries, blueberries and blackberries contain resveratrol. It occurs in many plant species and is also found in red wine.

What effects does resveratrol have in the body?

The NIH says resveratrol has antioxidant effects and stimulates the body's production of antioxidant enzymes. Only a limited amount taken by mouth becomes available to the body.

Is resveratrol safe?

Resveratrol may interact with estrogens, and the safety of its supplements during breastfeeding is not established. Commercial product purity is rarely clearly defined. Ask a clinician before starting.

Which supplements we reviewed contain resveratrol?

FitSpresso and VitaliSlim both list resveratrol and print its amount. FitSpresso lists 20 mg per 1 capsule serving, while VitaliSlim lists 12 mg per 1 capsule serving.

Sources

The products, amounts and prices come from each product's label and checkout, as its review shows them. AI drafts our pages from listed sources, figures are checked against them, and we have not tried the products.

  1. 1NIH LactMed, Resveratrolncbi.nlm.nih.gov/bookschecked
  2. 2NIH LiverTox, Resveratrolncbi.nlm.nih.gov/bookschecked