Resveragen
by Klaire Labs · capsule · 60 vegetarian capsules
- On the market (NIH)
- UPC 8 28054 00156 5
- DSLD label 264961
- Serving 1 capsule
- 60 servings
Resveragen by Klaire Labs lists one ingredient: 500 mg of japanese knotweed root extract per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on June 16, 2022.
What is in Resveragen?
Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Japanese Knotweed Root Extractas Trans-ResveratrolStandardized to 50% [250mg Trans-Resveratrol] | 500 mg | Higher than 80% of 269 products listing hu zhang (median 150 mg). Per day at the most servings: 1,000 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 264961 (entered June 16, 2022), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
The NIH database records 1 to 2 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
6 products list the very same ingredients; the nearest amounts come first.
- Bioforte ResveratrolBiotivia · off the market same ingredients
- Clinical Resveratrol 500 mgOL Olympian Labs · off the market same ingredients
- ResveratrolJuvenon same ingredients
- Resveratrol PlusSeeking Health same ingredients
- Trans-ResveratrolVitacost same ingredients
- Clinical Trans-Resveratrol 500 mgOL Olympian Labs same ingredients
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- Suggested Use: 1 capsule, 1 to 2 times daily with food or as directed by a healthcare professional.
- Warnings
- Caution: If you are pregnant, nursing, have a medical condition, or taking prescription drugs, consult your physician before using this product.
- Keep out of reach of children.
- Do not use if shrinkwrap is broken or missing.
- Allergens and what it does not contain
- Free of the following common allergens: Milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, soybeans, corn, and yeast. Contains no artificial colors, flavors, or preservatives.
- Storage
- Store in a cool, dry place (59 degrees F - 85 degrees F) away from direct light.
Source: label statements in DSLD label 264961.
What else is on the label?
Other ingredients: Hydroxypropyl Methylcellulose, Water, Microcrystalline Cellulose, Ascorbyl Palmitate, Silicon Dioxide.
How many labels does Resveragen have?
One label is on file, entered on June 16, 2022.
- Label 264961 (current) Entered June 16, 2022 · on the market · 60 vegetarian capsules · UPC 8 28054 00156 5
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names SFI USA (manufacturer), Reno, NV. All Klaire Labs products.