PlainVitamins

C-Glutamine

by Iagen Professional · powder · 300 grams Powder

  • On the market (NIH)
  • UPC 8 52980 00164 1
  • DSLD label 256286
  • Serving 5 g (1 Scoop)
  • 60 servings

C-Glutamine by Iagen Professional lists 3 ingredients, 3 with an amount per serving of 5 g, such as 5 mg of potassium, 40 mg of calcium and 25 mg of phosphorus, beside 7 Nutrition Facts rows (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on October 22, 2021.

What is in C-Glutamine?

Each row as the label prints it, per serving of 5 g. 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).

C-Glutamine: Supplement Facts rows against the market (DSLD label 256286, January 2026 release)
IngredientAmount% DVAmong products listing it
Total Fat0.2 g1%Fat (unspecified) in C-Glutamine against 11,965 products0.2 g per serving; the middle half of products list 1 g to 2.5 g, the median 1.5 g.0.2 g

98% of 11,965 products listing fat (unspecified) give more (median 1.5 g). Per day at the most servings: 0.6 g.

Cholesterol0 g
Sodium17 mg1%Sodium in C-Glutamine against 14,514 products17 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.17 mg

71% of 14,514 products listing sodium give more (median 55 mg). Per day at the most servings: 51 mg.

Potassium5 mg1%

This amount is far outside what other labels list for potassium, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD.

Total Carbohydrates0.6 g0%Carbohydrate in C-Glutamine against 21,979 products0.6 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.0.6 g

98% of 21,979 products listing carbohydrate give more (median 3 g). Per day at the most servings: 1.8 g.

Dietary Fiber0 g0%
Sugar0 g
Protein4 g8%Protein in C-Glutamine against 8,985 products4 g per serving; the middle half of products list 2 g to 24 g, the median 16 g.4 g

66% of 8,985 products listing protein give more (median 16 g). Per day at the most servings: 12 g.

Calcium40 mg3%*Calcium in C-Glutamine against 17,831 products40 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg40 mg

79% of 17,831 products listing calcium give more (median 115 mg). Per day at the most servings: 120 mg.

Phosphorus25 mg2%Phosphorus in C-Glutamine against 3,786 products25 mg per serving; the middle half of products list 45 mg to 200 mg, the median 90 mg.DV 1,250 mgUL 4,000 mg25 mg

86% of 3,786 products listing phosphorus give more (median 90 mg). Per day at the most servings: 75 mg.

* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.

Source: NIH ODS Dietary Supplement Label Database, label 256286 (entered October 22, 2021), 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 1 to 3 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?

1 product lists 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
Suggested Use: Add one or more scoops of G-Glutamine to food or blend with any liquids, hot or cold. Consume 1 to 3 times daily.
Warnings
Read First: Children, women who are pregnant or nursing and those who are being treated for a medical condition should consult a health care provider before using any dietary supplement.

Source: label statements in DSLD label 256286.

What else is on the label?

Other ingredients: Proprietary Covalent Bonded Glutamine.

How many labels does C-Glutamine have?

One label is on file, entered on October 22, 2021.

  1. Label 256286 (current) Entered October 22, 2021 · on the market · 300 grams Powder · UPC 8 52980 00164 1

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

Who makes it?

The label names Iagen Professional (manufacturer). All Iagen Professional products.

Where next?