PlainVitamins

amino acid

Cystine supplements

Half of the 75 cystine supplements in the NIH label database that print an amount list 75 mg or less per serving; the middle half list 17 mg to 366.5 mg (DSLD version 9.4.0, January 2026).

Products listing it
11775 print an amount; 42 list it inside a blend without an amount
Median per serving
75 mgmiddle half 17 mg to 366.5 mg

How much cystine do supplements contain?

The median product lists 75 mg per serving. One in ten lists 11 mg or less, one in ten 634 mg or more. The amount printed most often is 11 mg (7 products).

Products by amount of cystine per serving

75 products, log scale; extreme 0.2% at each end left out of the drawing.

Cystine: products by amount per serving0.3 mg3 mg30 mg300 mg
Cystine: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg
Cystine: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg
Cystine: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg
Cystine: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg
The amounts printed most often
Amount per servingProductsFor example
11 mg7 Collagen Hydrolysate Apple + Cucumber Flavored (Great Lakes Gelatin Co.); Collagen Bone Hydrolysate Unflavored (Great Lakes Gelatin); Pork Gelatin Unflavored (Great Lakes Gelatin)
737 mg4
60 mg3 Amino Acid 750 mg (Bluebonnet); Amino Acids 1000 mg (Bluebonnet)
80 mg3 Protein & Greens Unflavored (Natural Factors Whole Earth & Sea); Protein & Greens Organic Vanilla Chai (Natural Factors Whole Earth & Sea); Core Minerals (USANA)
100 mg3 Vitamins for the Hair Timed Release (Puritan's Pride); Amd (Genestra Brands); Cell Detox Formula (Beyond Health)
140 mg3 Universal Amino 2700 (Universal); Amino 1900 (Universal); Universal Amino 2700 (Universal Nutrition)
634 mg3 Competitive Mass (Lee Haney's Nutritional Support Systems)
0.127 mg2 LBA PRO Chocolate Syrup (All American EFX); LBA PRO Vanilla Glaze (All American EFX)
14 mg2 Amino Acid Complex (Bronson); Amino Acid Complex (Bronson Laboratories)
40 mg2

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most cystine?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

In which products and brands?

Products listing cystine by DSLD product type

Cystine by product typeOther Combinations50Amino acid/Protein24Multi-Vitamin and Mineral (MVM)1
Cystine by product typeOther Combinations50Amino acid/Protein24Multi-Vitamin and Mineral (MVM)1
Cystine by product typeOther Combinations50Amino acid/Protein24Multi-Vitamin and Mineral (MVM)1
Cystine by product typeOther Combinations50Amino acid/Protein24Multi-Vitamin and Mineral (MVM)1
Cystine by product typeOther Combinations50Amino acid/Protein24Multi-Vitamin and Mineral (MVM)1

Brands listing it most: Universal (7), Great Lakes Gelatin Co. (5), Douglas Laboratories (5), Animal (5), Bronson (4), Barlean's (4), Bluebonnet (3), MacroLife Naturals (3), All American EFX (2), Anutra (2).

Every product listing cystine

117 products, A to Z by name (page 2 of 3), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?