PlainVitamins

amino acid

Isoleucine supplements

Half of the 1,614 isoleucine supplements in the NIH label database that print an amount list 1.23 g or less per serving; the middle half list 0.5 g to 1.5 g (DSLD version 9.4.0, January 2026).

Products listing it
2,7451,614 print an amount; 1,131 list it inside a blend without an amount
Median per serving
1.23 gmiddle half 0.5 g to 1.5 g

How much isoleucine do supplements contain?

The median product lists 1.23 g per serving. One in ten lists 0.151 g or less, one in ten 2 g or more. The amount printed most often is 1.25 g (250 products).

Products by amount of isoleucine per serving

1,614 products, log scale; extreme 0.2% at each end left out of the drawing.

Isoleucine: products by amount per serving0.001 g0.01 g0.1 g1 g10 g
Isoleucine: products by amount per serving0.001 g0.01 g0.1 g1 g3 g10 g
Isoleucine: products by amount per serving0.001 g0.01 g0.1 g0.3 g1 g3 g10 g
Isoleucine: products by amount per serving0.001 g0.003 g0.01 g0.03 g0.1 g0.3 g1 g3 g10 g
Isoleucine: products by amount per serving0.001 g0.003 g0.01 g0.03 g0.1 g0.3 g1 g3 g10 g
The amounts printed most often
Amount per servingProductsFor example
1.25 g250 N'Gage Glacier Punch (Axis Labs); BCAA Power Fruit Punch Flavor (Labrada Nutrition); Instantized BCAA 5000 Powder Orange (ON Optimum Nutrition)
1 g161 Whey For Her Protein Vanilla Bean (Vitamin World); Whey For Her Protein Wild Strawberry (Vitamin World); RapidDrive BCAA 5000 Unflavored (GNC Pro Performance)
1.5 g150 Amino Drive Black Bruisin' Berry (Nutrex Research); Amino Drive Black Gashin' Grape (Nutrex Research); Amino Drive Black Malicious Melon (Nutrex Research)
1.75 g86 XTEND Lemon Lime Sour (Scivation); BCAA Plus Branched Chain Amino Acid Grape (NewtonEverett); HydroBCAA Blue Razz (PS ProSupps)
2.5 g64 Bulk 1340 Vanilla (GNC Pro Performance); ABC White Appletini (Core Nutritionals); ABC Crystal Blue Raspberry (Core Nutritionals)
0.5 g54 L-Isoleucine 500 mg (Douglas Laboratories); Pre-Load Creatine Complex Fruit Punch (ON Optimum Nutrition); Amino 1 Orange Mango (MusclePharm)
0.25 g51 Torch After-Burn Recovery Drink Creamy Vanilla Flavor (Market America); OptiCleanse Plus Rice Raspberry Lemonade (XYMOGEN); Electro Endurance Orange Flavor (NOW Sports)
2 g47 Amino Build Fruit Punch (MuscleTech Performance Series); Amino Build Green Apple (MuscleTech Performance Series); 100% Pure L-Isoleucine (NutraBio)
0.625 g39 Critical Aminos XT Grape (BodyTech); Critical Aminos XT Pineapple (BodyTech); Critical Aminos XT Fruit Punch (BodyTech)
1.8 g33 RapidDrive Post-Workout Amino Complex Fruit Punch (GNC Pro Performance); Endurance BCAA Plus (Fahrenheit Nutrition); Intra Blast Raw Unflavored (NutraBio)

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 isoleucine?

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 1.1 g; those entered in 2025, 1.25 g.

Median isoleucine per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
2011501.1 g
2012630.5 g
2013820.5 g
2014851 g
2015981.25 g
2016871 g
2017901.2 g
20181071.25 g
2019691 g
20201731.25 g
20211451.25 g
20221451 g
20231441.25 g
20241251 g
20251511.25 g

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

In which products and brands?

Products listing isoleucine by DSLD product type

Isoleucine by product typeOther Combinations1,111Amino acid/Protein462Botanical with Nutrients37Non-Nutrient/Non-Botanical3Multi-Vitamin and Mineral (MVM)1
Isoleucine by product typeOther Combinations1,111Amino acid/Protein462Botanical with Nutrients37Non-Nutrient/Non-Botanical3Multi-Vitamin and Mineral (MVM)1
Isoleucine by product typeOther Combinations1,111Amino acid/Protein462Botanical with Nutrients37Non-Nutrient/Non-Botanical3Multi-Vitamin and Mineral (MVM)1
Isoleucine by product typeOther Combinations1,111Amino acid/Protein462Botanical with Nutrients37Non-Nutrient/Non-Botanical3Multi-Vitamin and Mineral (MVM)1
Isoleucine by product typeOther Combinations1,111Amino acid/Protein462Botanical with Nutrients37Non-Nutrient/Non-Botanical3Multi-Vitamin and Mineral (MVM)1

Brands listing it most: NutraBio (66), Core Nutritionals (42), MuscleTech Performance Series (36), XTEND (35), GNC Beyond Raw (33), GNC Pro Performance (29), JYM Supplement Science (27), Evlution Nutrition (26), Douglas Laboratories (23), Universal (22).

Every product listing isoleucine

2,745 products, A to Z by name (page 48 of 55), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

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