Glutathione Precursors
by Genestra Brands · capsule · 30 vegetarian capsules
- On the market (NIH)
- UPC 8 83196 14570 6
- DSLD label 239078
- Serving 1 capsule
- 30 servings
Glutathione Precursors by Genestra Brands lists 4 ingredients, 4 with an amount per serving of 1 capsule, such as 200 mg of N-acetyl-L-cysteine, 200 mg of L-glutamic acid, 200 mg of DL-alpha lipoic acid and 100 mg of L-glycine. Its current label entered the NIH Dietary Supplement Label Database on November 21, 2020.
What is in Glutathione Precursors?
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 |
|---|---|---|---|
| N-Acetyl-L-Cysteine | 200 mg | Higher than 51% of 1,259 products listing N-acetyl cysteine (median 150 mg). | |
| L-Glutamic Acid | 200 mg | Higher than 68% of 697 products listing glutamic acid (median 80 mg). | |
| DL-Alpha Lipoic Acid | 200 mg | Higher than 78% of 2,407 products listing alpha lipoic acid (median 50 mg). | |
| L-Glycine | 100 mg | 64% of 1,078 products listing glycine give more (median 300 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 239078 (entered November 21, 2020), version 9.4.0. See the label on DSLD. 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 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?
The products whose ingredient lists overlap most with Glutathione Precursors's, rare ingredients counting for more.
- Glutathione 250 mgProCaps · off the market 3 shared, 61% alike
- Solvent RemoverThorne Research · off the market 3 shared, 51% alike
- NAC + Glycine Powder Natural Peach Ginger FlavorPure Encapsulations 2 shared, 50% alike
- Glycine & NACDoNotAge.org 2 shared, 50% alike
- Ala+nacProCaps Laboratories 2 shared, 42% alike
- GSH-PlusBiotics Research Corporation 2 shared, 39% alike
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
- Recommended Dose: Take 1 capsule daily with a meal or as recommended by your health professional.
- Warnings
- Warning: If you are pregnant or lactating, have any health condition or are taking any medication, consult your health professional before use.
- Keep out of the reach of children.
- Use only if safety seal is intact.
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 239078.
What else is on the label?
Other ingredients: Hypromellose, Magnesium Stearate.
How many labels does Glutathione Precursors have?
2 labels are on file under this name since February 23, 2016: other sizes, label designs and reformulations. The current one leads this page.
- Label 239078 (current) Entered November 21, 2020 · on the market · 30 vegetarian capsules · UPC 8 83196 14570 6
- Label 56167 Entered February 23, 2016 · off the market August 21, 2020 · 30 vegetable capsules · UPC 883196 14570
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Seroyal USA (distributor), Pittsburgh, PA. All Genestra Brands products.