PlainVitamins

Grapefruit Seed Extract 400 mg

by Signature Supplements · capsule · 100 capsules

  • On the market (NIH)
  • DSLD label 338768
  • Serving 2 capsules
  • 50 servings

Grapefruit Seed Extract 400 mg by Signature Supplements lists one ingredient: 800 mg of grapefruit seed extract per serving of 2 capsules. Its current label entered the NIH Dietary Supplement Label Database on September 25, 2025.

What is in Grapefruit Seed Extract 400 mg?

Each row as the label prints it, per serving of 2 capsules. 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).

Grapefruit Seed Extract 400 mg: Supplement Facts rows against the market (DSLD label 338768, January 2026 release)
IngredientAmount% DVAmong products listing it
Grapefruit Seed Extract800 mgGrapefruit in Grapefruit Seed Extract 400 mg against 220 products800 mg per serving; the middle half of products list 50 mg to 250 mg, the median 100 mg.800 mg

Higher than 93% of 220 products listing grapefruit (median 100 mg).

Source: NIH ODS Dietary Supplement Label Database, label 338768 (entered September 25, 2025), 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?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 800 mg of grapefruit is higher than 93% of the 220 grapefruit products that print an amount; 14 list more.

The NIH database records one serving 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.

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
Directions: For adults, take two (2) capsules daily, more if needed.
Warnings
As a reminder, discuss the supplements and medications you take with your health care providers. Warning: Pregnant or lactating women should consult a doctor before using any product.
Discontinue use and consult your doctor if any adverse reactions occur, such as gastrointestinal discomfort or any allergic reaction.
Not intended for use by persons under the age of 18.
Allergens and what it does not contain
Contains no: chemical fillers or binders, artificial coloring, artificial flavor, preservatives, yeast, corn, milk or milk derivatives, lactose, salt, sodium, soy, sugar, gluten, starch or wheat.
Storage
Store in a dry place and avoid excessive heat.

Source: label statements in DSLD label 338768.

What else is on the label?

Other ingredients: Cellulose, Diatomaceous Earth.

How many labels does Grapefruit Seed Extract 400 mg have?

One label is on file, entered on September 25, 2025.

  1. Label 338768 (current) Entered September 25, 2025 · on the market · 100 capsules

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Signature Supplements (distributor), San Clemente, CA. All Signature Supplements products.

Where next?