Ingredient

L-isoleucine

Auto-generated content. This description was generated automatically and is pending editorial review. Inaccuracies are possible. Found a mistake? Contact us.

Source
Unknown
Not yet classified by editors
Allergen
No
Role in food
L-isoleucine is often added to sports nutrition products, such as energy drinks and protein …

What it is

L-isoleucine is one of the essential amino acids, meaning the body cannot produce it and it must be obtained from food. It is a component of proteins and is found naturally in many protein-rich foods like meat, poultry, fish, eggs, dairy products, and legumes. It can also be produced commercially through fermentation processes.

Why it's used

L-isoleucine is often added to sports nutrition products, such as energy drinks and protein supplements, to support muscle recovery and energy production. It may also be used in infant formulas and medical foods. Its primary function in these products is as a nutritional supplement.

Health notes

L-isoleucine is Generally Recognized As Safe (GRAS) by the FDA for use as a nutrient in food. As an essential amino acid, it plays a vital role in human health. International bodies like JECFA have evaluated amino acids, and EFSA has also reviewed their safety. Typical intakes from food and supplements are not associated with adverse health effects.

Allergen info

L-isoleucine is not derived from any of the nine FDA major allergens. It does not contain gluten.

Products containing L-isoleucine

Compare products →
Sort by: Sugar Protein Sodium Calories
BIOSTEEL Biosteel, High Performance Sports Drink Powdered Drinks 100kcal —Protein 0Fat 24Carbs Black Cherry Vanilla Energy Drink, Black Cherry Vanilla Vital Pharmaceuticals, Inc. Black Cherry Vanilla Energy Drink, Black Cherry Vanilla Soda 1kcal 0Protein 0Fat 0Carbs Nucare Whey Protein Nutritional Supplement, Strawberry Cereal 387kcal 72.4Protein 3.1Fat 15.8Carbs N V E Pharmaceuticals Creamy Vanilla Protein, Creamy Vanilla Soda 375kcal —Protein 1.6Fat 21.9Carbs N V E Pharmaceuticals Double Dutch Chocolate Protein, Double Dutch Chocolate Soda 375kcal —Protein 1.6Fat 25Carbs Pivotal Health Solutions, Inc. Protein Pouches, Berry Water 136kcal 33.9Protein 0Fat 0Carbs Pivotal Health Solutions, Inc. Protein Boosts Performance Formulated For Women, Strawberry Water 102kcal 25.4Protein 0Fat 0Carbs NeoPro Nutritional Sciences, LLC Protein Drink, Orange Other Drinks 24kcal 2.0Protein 0Fat 4.1Carbs Potent Brain And Body Fuel, Purple Guava Pear Vital Pharmaceuticals, Inc. Potent Brain And Body Fuel, Purple Guava Pear Soda 0kcal 0Protein 0Fat 0Carbs Blue Raz Energy Drink, Blue Raz PepsiCo, Inc. (Rockstar) Blue Raz Energy Drink, Blue Raz Soda 0kcal 0Protein 0Fat 0Carbs Prevention, LLC Naturade, Whey Protein Shake, Vanilla Energy, Protein & Muscle Recovery Drinks 409kcal 62.5Protein 12.5Fat 18.8Carbs Prevention, LLC Naturade, Whey Protein Shake, Chocolate Energy, Protein & Muscle Recovery Drinks 394kcal 62.5Protein 9.4Fat 18.8Carbs
L-valine (163 products) L-leucine (158 products) Sucralose (146 products) Natural Flavors (128 products) Citric Acid (123 products) Pyridoxine Hydrochloride (118 products) Acesulfame Potassium (102 products) Niacinamide (101 products) Carbonated Water (99 products) Cyanocobalamin (89 products)

Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.