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.

The amounts printed most often
Amount per serving	Products	For example
1.25 g	250	N'Gage Glacier Punch (Axis Labs); BCAA Power Fruit Punch Flavor (Labrada Nutrition); Instantized BCAA 5000 Powder Orange (ON Optimum Nutrition)
1 g	161	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 g	150	Amino Drive Black Bruisin' Berry (Nutrex Research); Amino Drive Black Gashin' Grape (Nutrex Research); Amino Drive Black Malicious Melon (Nutrex Research)
1.75 g	86	XTEND Lemon Lime Sour (Scivation); BCAA Plus Branched Chain Amino Acid Grape (NewtonEverett); HydroBCAA Blue Razz (PS ProSupps)
2.5 g	64	Bulk 1340 Vanilla (GNC Pro Performance); ABC White Appletini (Core Nutritionals); ABC Crystal Blue Raspberry (Core Nutritionals)
0.5 g	54	L-Isoleucine 500 mg (Douglas Laboratories); Pre-Load Creatine Complex Fruit Punch (ON Optimum Nutrition); Amino 1 Orange Mango (MusclePharm)
0.25 g	51	Torch After-Burn Recovery Drink Creamy Vanilla Flavor (Market America); OptiCleanse Plus Rice Raspberry Lemonade (XYMOGEN); Electro Endurance Orange Flavor (NOW Sports)
2 g	47	Amino Build Fruit Punch (MuscleTech Performance Series); Amino Build Green Apple (MuscleTech Performance Series); 100% Pure L-Isoleucine (NutraBio)
0.625 g	39	Critical Aminos XT Grape (BodyTech); Critical Aminos XT Pineapple (BodyTech); Critical Aminos XT Fruit Punch (BodyTech)
1.8 g	33	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).

Grunt Cherry LimeRedcon115.8 g
Grunt Blood OrangeRedcon115.8 g
Hit BCAA 4:1:1 + Glutamine PeachDY Nutrition8.33 g
Hit BCAA 4:1:1 + Glutamine StrawberryDY Nutrition8.33 g
Amino 8:1:1+L-Glutamine Blue Raz FlavourPromuscle Products7.55 g
100% Whey Protein ApfelstrudelBody Attack Sports Nutrition6.12 g
Re-Grow Vanilla CreamGNC Beyond Raw6 g
Re-Grow ChocolateGNC Beyond Raw6 g

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)
Year	Products	Median per serving
2011	50	1.1 g
2012	63	0.5 g
2013	82	0.5 g
2014	85	1 g
2015	98	1.25 g
2016	87	1 g
2017	90	1.2 g
2018	107	1.25 g
2019	69	1 g
2020	173	1.25 g
2021	145	1.25 g
2022	145	1 g
2023	144	1.25 g
2024	125	1 g
2025	151	1.25 g

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

In which products and brands?

Products listing isoleucine by DSLD product type

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 42 of 55), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Plant AminosTriquetrain a blend
Plant Protein 21 g BananaSNAP0.943 g
Plant Protein Chocolate FlavoredLadderin a blend
Plant Protein Complete and Amino Acid Complex Vanilla FlavorLife Extension Wellness Codein a blend
Plant Protein Vanilla FlavoredLadderin a blend
Planta Madagascar VanillaAmbrosiain a blend
PlantFusion ChocolateNutraFusion Nutritionals · off the marketin a blend
PlantFusion Chocolate RaspberryNutraFusion Nutritionalsin a blend
PlantFusion Cookies N' CremeNutraFusion Nutritionalsin a blend
PlantFusion UnflavoredNutraFusion Nutritionalsin a blend
PlantFusion Vanilla BeanNutraFusion Nutritionals · off the marketin a blend
Plasma Blast Fruit PunchHuman Evolution Supplements · off the market0.2 g
Platinum BCAA 8:1:1MuscleTech Essential Series0.1 g
Platinum Core Fuel Melon Berry PunchPMD Platinumin a blend
Platinum X-30 PlusRightWay Nutrition · off the marketin a blend
Pork Gelatin UnflavoredGreat Lakes Gelatin0.144 g
Post BCAA GrapeANSin a blend
Post BCAA Strawberry KiwiANSin a blend
Post BCAA WatermelonANSin a blend
Post JYM Active Ingredients Fruit PunchJYM Supplement Science · off the market1.2 g
Post JYM Active Ingredients Matrix Fruit PunchJYM · off the market1.2 g
Post JYM Active Ingredients Matrix LemonadeJYM Supplement Science · off the market1.2 g
Post JYM Active Ingredients Matrix Mandarin OrangeJYM Supplement Science · off the market1.2 g
Post JYM Active Ingredients Matrix Rainbow SherbetJYM Supplement Science · off the market1.2 g
Post JYM Active Ingredients Matrix WatermelonJYM Supplement Science · off the market1.2 g
Post JYM Active Ingredients Matrix WatermelonJYM · off the market1.2 g
Post JYM BCAAs+ Recovery Matrix Blue Arctic FreezeJYM Supplement Science1.2 g
Post JYM BCAAs+ Recovery Matrix Fruit PunchJYM Supplement Science1.2 g
Post JYM BCAAs+ Recovery Matrix Rainbow SherbetJYM Supplement Science1.2 g
Post Peach MangoNutraBio2 g
Post Protocol Black CherryBodybuilding.com Platinum Series2 g
Post Protocol Fruit PunchBodybuilding.com Platinum Series2 g
Post Raw UnflavoredNutraBio · off the market2 g
Post WorkATP Mechanix · off the marketin a blend
Post WorkoutATP Mechanix · off the marketin a blend
Post Workout Fruit PunchEquate1.2 g
Post-Rx Blue RaspberryRivalus1.25 g
Post-Rx Green AppleRivalus1.25 g
Post-RX Lemon LimeRivalus1.25 g
Post-Workout Recovery Cherry Lemonade FlavoredXS Rechargein a blend
Post-Workout Recovery ChocolateAdvoCare0.1 g
Post-Workout Recovery Fruit PunchXSin a blend
Post-Workout Recovery Fruit Punch FlavoredXSin a blend
Post-Workout Recovery VanillaAdvoCare0.1 g
PostAbolic Exotic BerryChaotic-Labzin a blend
PostAbolic Exotic OrangeChaotic-Labzin a blend
Postlift Blackberry LemonadeNutrex Research Clinical Edge0.5 g
Postlift Fruit PunchNutrex Research Clinical Edge2.5 g
Postlift StrawberryNutrex Research Clinical Edge0.5 g
PostPump UnflavoredDo Vitamins0.75 g