Ingredient

L-Isoleucine

L-Isoleucine is an essential amino acid important for energy production and muscle function in the body.

All medicines
182
Combination
182
Prescription medication
168
OTC medication
14

MFDS ingredient code M222530

What does it do?

L-Isoleucine is one of the essential amino acids that the body cannot produce on its own, so it must be obtained through food or medication. It is primarily used for enhancing physical performance and nutritional supplementation, as well as aiding muscle recovery and energy metabolism.

L-Isoleucine is used as an energy source in muscle cells and contributes to protein synthesis, helping to maintain and repair muscle tissue. It also plays a role in blood sugar regulation, assisting the body in utilizing energy efficiently.

Approved uses differ by product. Check each product's information for its actual use.

Good to know

L-Isoleucine works together with other essential amino acids, but it plays a particularly important role in muscle energy metabolism. Unlike similar amino acids such as leucine and valine, it has a more direct impact on blood sugar regulation.

Medicines containing this ingredient

Even with the same ingredient, strength, dosage form and how it is taken can differ.

Category
Dosage form
Strength
Category

182 total

View more

Even with the same ingredient, dosage and approved uses can differ by strength, dosage form and combined ingredients. Check each product's information before taking it.

Combined ingredients

Ingredients used together with this ingredient in combination products.

Questions about this ingredient

  • QCan my mother, who has diabetes, take amino acid supplements?

    The ingredient description states that L-Isoleucine is involved in blood sugar regulation, so if you are being treated for diabetes, prior confirmation is necessary before adding any supplements. Please discuss your diabetes medication alongside these products with your physician or pharmacist.

    Answers 1 · 2026.09.14

  • QCan L-isoleucine be obtained from food?

    L-Isoleucine is an essential amino acid that the body cannot produce on its own, so it must be obtained through food or pharmaceuticals. In pharmaceuticals, it is used for enhancing physical strength and nutritional supplementation, aiding in muscle recovery and energy metabolism.

    Answers 1 · 2026.09.14

For anything that needs medical judgment, consult a doctor or pharmacist.

SourceKorea Ministry of Food and Drug Safety (Drug Safety Korea)

This drug information is based on data provided by the Korea Ministry of Food and Drug Safety.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.