PlainVitamins

amino acid

Leucine supplements

Half of the 2,056 leucine supplements in the NIH label database that print an amount list 2.5 g or less per serving; the middle half list 1 g to 3.5 g (DSLD version 9.4.0, January 2026). The 32 products whose only supplement ingredient is leucine list a median of 3 g.

Products listing it
3,3042,056 print an amount; 1,248 list it inside a blend without an amount
Median per serving
2.5 gmiddle half 1 g to 3.5 g

How much leucine do supplements contain?

The median product lists 2.5 g per serving. One in ten lists 0.203 g or less, one in ten 5 g or more. The amount printed most often is 2.5 g (261 products).

Products by amount of leucine per serving

2,056 products, log scale; extreme 0.2% at each end left out of the drawing.

Leucine: products by amount per serving0.01 g0.1 g1 g3 g10 g
Leucine: products by amount per serving0.01 g0.1 g1 g3 g10 g30 g
Leucine: products by amount per serving0.01 g0.03 g0.1 g0.3 g1 g3 g10 g30 g
Leucine: products by amount per serving0.003 g0.01 g0.03 g0.1 g0.3 g1 g3 g10 g30 g
Leucine: products by amount per serving0.003 g0.01 g0.03 g0.1 g0.3 g1 g3 g10 g30 g
The amounts printed most often
Amount per servingProductsFor example
2.5 g261 N'Gage Glacier Punch (Axis Labs); Purple InTrain Purple Raspberry Flavor (Controlled Labs); BCAA Power Fruit Punch Flavor (Labrada Nutrition)
3 g206 Amino Complex 4400 (GNC Pro Performance); RapidDrive BCAA 5000 Unflavored (GNC Pro Performance); RapidDrive Pre-Workout Amino Complex Fruit Punch (GNC Pro Performance)
3.5 g130 RapidDrive Post-Workout Amino Complex Fruit Punch (GNC Pro Performance); XTEND Lemon Lime Sour (Scivation); Endurance BCAA Plus (Fahrenheit Nutrition)
2 g123 Whey For Her Protein Vanilla Bean (Vitamin World); Whey For Her Protein Wild Strawberry (Vitamin World); SuperPump Max Raspberry Lemonade (Gaspari Nutrition)
5 g109 SizeOn Fruit Punch (Gaspari Nutrition); SizeOn Concord Grape (Gaspari Nutrition); Leucine (Serious Nutrition Solutions)
0.5 g104 Torch After-Burn Recovery Drink Creamy Vanilla Flavor (Market America); L-Leucine 500 mg (Douglas Laboratories); Pre-Load Creatine Complex Fruit Punch (ON Optimum Nutrition)
4 g76 Monster Mass Chocolate (CytoSport); Monster Mass Vanilla Creme (CytoSport); Monster Mass Strawberries 'N Creme (CytoSport)
1 g63 Pump-HD Orange Twist (BPI); Pump-HD Blue Ice Lemonade (BPI); Amino Freak AF Blue Raspberry Flavour (PharmaFreak)
1.5 g53 Monster Pump Fruit Punch (CytoSport); Monster Pump Blue Raspberry (CytoSport); Monster Pump Sour Grape (CytoSport)
1.25 g38 Critical Aminos XT Grape (BodyTech); Critical Aminos XT Pineapple (BodyTech); Critical Aminos XT Fruit Punch (BodyTech)

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 leucine?

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 2 g; those entered in 2025, 2.5 g.

Median leucine per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
2011642 g
2012791.44 g
20131191 g
20141212.2 g
20151722.5 g
20161152.25 g
20171242.5 g
20181252.6 g
2019832.87 g
20202132.5 g
20211683 g
20221692.5 g
20231632.5 g
20241622.5 g
20251792.5 g

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

In which products and brands?

Products listing leucine by DSLD product type

Leucine by product typeOther Combinations1,500Amino acid/Protein497Botanical with Nutrients54Non-Nutrient/Non-Botanical4Multi-Vitamin and Mineral (MVM)1
Leucine by product typeOther Combinations1,500Amino acid/Protein497Botanical with Nutrients54Non-Nutrient/Non-Botanical4Multi-Vitamin and Mineral (MVM)1
Leucine by product typeOther Combinations1,500Amino acid/Protein497Botanical with Nutrients54Non-Nutrient/Non-Botanical4Multi-Vitamin and Mineral (MVM)1
Leucine by product typeOther Combinations1,500Amino acid/Protein497Botanical with Nutrients54Non-Nutrient/Non-Botanical4Multi-Vitamin and Mineral (MVM)1
Leucine by product typeOther Combinations1,500Amino acid/Protein497Botanical with Nutrients54Non-Nutrient/Non-Botanical4Multi-Vitamin and Mineral (MVM)1

Brands listing it most: NutraBio (105), PS ProSupps (57), GNC Beyond Raw (56), Core Nutritionals (49), GNC Pro Performance AMP (46), GNC AMP Advanced Muscle Performance (39), MuscleTech Performance Series (36), XTEND (35), CytoSport (33), Gaspari Nutrition (31).

Every product listing leucine

3,304 products, A to Z by name (page 58 of 67), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?