PlainVitamins

amino acid

Glycine supplements

Half of the 1,078 glycine supplements in the NIH label database that print an amount list 300 mg or less per serving; the middle half list 100 mg to 846 mg (DSLD version 9.4.0, January 2026). The 52 products whose only supplement ingredient is glycine list a median of 1,000 mg.

Products listing it
1,7151,078 print an amount; 636 list it inside a blend without an amount
Median per serving
300 mgmiddle half 100 mg to 846 mg

How much glycine do supplements contain?

The median product lists 300 mg per serving. One in ten lists 30 mg or less, one in ten 1,650 mg or more. The amount printed most often is 100 mg (124 products).

Products by amount of glycine per serving

1,078 products, log scale; extreme 0.2% at each end left out of the drawing.

Glycine: products by amount per serving0.3 mg3 mg30 mg300 mg
Glycine: products by amount per serving0.3 mg3 mg10 mg100 mg1,000 mg
Glycine: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg1,000 mg
Glycine: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
Glycine: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg3,000 mg
The amounts printed most often
Amount per servingProductsFor example
100 mg124 Wrinkle Free Skin Formula (Vitabase); Kid's Factors Wild Berry Smoothie Mix (Natural Factors); Vita-Glan-M (Douglas Laboratories)
1,000 mg75 Recon (MusclePharm); Glycine (Protocol For Life Balance); Pump-HD Orange Twist (BPI)
50 mg74 Energy/Sports Pack (Douglas Laboratories); Omega-3s Antioxidants (Anutra); Clinical Prostate Suppport (Natural Clinician)
500 mg72 gHP Sport (SomaLife International); Youth Formula (SomaLife); Gut Feeling Max (HoltraCeuticals)
3,000 mg36 Glycine Sticks (Metabolic Maintenance); ZZZ Razzzberry Lemonade (Core Nutritionals); Sleep Reset Orange Flavored (Integrative Therapeutics)
25 mg35 Amino Sport (Biotics Research Corporation); IGA+Intercellular Glutathione Inducers (Ecological Formulas); GABA-750 (Metabolic Maintenance)
250 mg25 Dextox In Guard Tabsules (Perque); Detox In Guard Tabsule (Perque); Amino D Tox (Designs for Health)
30 mg22 Take Heart II Without Hormones (Allergy Research Group); PureMulti for Men (PureFormulas); Vision Gard (DC)
200 mg22 True Calm (Vitabase); Palmetto-Plus (Biotics Research Corporation); StressArrest (Designs for Health)
150 mg19 Redox (Douglas Laboratories); Prostate Formula (Altrum); Liver Support & Detox Intensive Lemon-Berry Flavor (Genestra Brands)

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 glycine?

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).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 340 mg; those entered in 2025, 315.3 mg.

Median glycine per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
201127340 mg
201279315.3 mg
2013111210 mg
201450452.5 mg
201546450 mg
201632325 mg
201749390 mg
201842438 mg
201961150 mg
202090390 mg
202167313 mg
2022124260 mg
202396212.5 mg
202495225 mg
2025109315.3 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing glycine by DSLD product type

Glycine by product typeOther Combinations846Amino acid/Protein150Botanical with Nutrients74Non-Nutrient/Non-Botanical4Vitamin2Fiber and Other Nutrients1Multi-Vitamin and Mineral (MVM)1
Glycine by product typeOther Combinations846Amino acid/Protein150Botanical with Nutrients74Non-Nutrient/Non-Botanical4Vitamin2Fiber and Other Nutrients1Multi-Vitamin and Mineral (MVM)1
Glycine by product typeOther Combinations846Amino acid/Protein150Botanical with Nutrients74Non-Nutrient/Non-Botanical4Vitamin2Fiber and Other Nutrients1Multi-Vitamin and Mineral (MVM)1
Glycine by product typeOther Combinations846Amino acid/Protein150Botanical with Nutrients74Non-Nutrient/Non-Botanical4Vitamin2Fiber and Other Nutrients1Multi-Vitamin and Mineral (MVM)1
Glycine by product typeOther Combinations846Amino acid/Protein150Botanical with Nutrients74Non-Nutrient/Non-Botanical4Vitamin2Fiber and Other Nutrients1Multi-Vitamin and Mineral (MVM)1

Brands listing it most: Douglas Laboratories (38), AdvoCare (29), Metabolic Maintenance (28), Metagenics (20), Enzymatic Therapy (19), Integrative Therapeutics (19), Pure Encapsulations (16), Muscle Feast (16), NutraBio (16), Thorne Research (13).

Every product listing glycine

1,715 products, A to Z by name (page 9 of 35), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?