Catalog No. Size PriceQuantity
M13275-2 2mg solid $80
M13275-10 10mg solid $240


L-Leucine is an essential branched-chain amino acid (BCAA), which activates the mTOR signaling pathway.

Product information

CAS Number: 61-90-5

Molecular Weight: 131.17

Formula: C6H13NO2

Chemical Name: (2S)-2-amino-4-methylpentanoic acid

Smiles: CC(C)C[C@H](N)C(O)=O


InChi: InChI=1S/C6H13NO2/c1-4(2)3-5(7)6(8)9/h4-5H,3,7H2,1-2H3,(H,8,9)/t5-/m0/s1

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: H2O : 8.33 mg/mL (63.51 mM; Need ultrasonic).

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

L-Leucine (10 mM) treatment impairs endocrine progenitor cell development. In E13.5 rat pancreatic explants, in absence of added L-Leucine, Ngn3 mRNA levels increased after 1 day of culture, peaked on day 3, and then decreased. When L-Leucine is added, a dramatic decrease is observed in Ngn3 mRNA levels. This decrease in Ngn3 mRNA levels was paralleled by a decrease in the number of Ngn3-expressing cells (4728±408 vs. 959±28; P<0.01). Finally, L-Leucine also caused a dose-dependent repressive effect on the mRNA levels of the three genes, namely Ngn3, its target Insm1, and insulin. Leucine stimulates protein synthesis in skeletal muscle of neonatal pigs by enhancing mTORC1 activation. L-Leucine increases intracellular HIF-1α levels and activates the HIF-1α signaling pathway, and these two effects are mediated by the mTOR signaling pathway. This process results in Ngn3 repression and, consequently, decreases β-cell differentiation.

In Vivo:

L-Leucine (24 g/kg diet) combined with Resveratrol (12.5 mg/kg diet) to diet-induced obese (DIO) mice increases adipose Sirt1 activity. Combination results in significant reductions in body weight, weight gain, visceral adipose tissue mass, fat oxidation and heat production in mice.


  1. Rachdi L, et al. L-leucine alters pancreatic β-cell differentiation and function via the mTor signaling pathway. Diabetes. 2012 Feb;61(2):409-17.
  2. Bruckbauer A, et al. Synergistic effects of leucine and resveratrol on insulin sensitivity and fat metabolism in adipocytes and mice. Nutr Metab (Lond). 2012 Aug 22;9(1):77.

Products are for research use only. Not for human use.

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