BCAAs (Branched-Chain Amino Acids)

BCAAs

Essential for muscle protein synthesis and recovery. Commonly used in sports nutrition.

Part of BCAAs amino acid
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Typical dose

5-20 grams daily, often taken around workouts. T...

Rating

0.0/5

Oral Oral safety: low

About this supplement

Branched-chain amino acids (BCAAs) are a group of three essential amino acids: L-leucine, L-isoleucine, and L-valine. They are termed 'branched-chain' due to their aliphatic side-chains with a branch point. Unlike other amino acids, BCAAs are primarily metabolized in skeletal muscle rather than the liver. They are critical for protein synthesis, muscle repair, and energy production during exercise. As essential amino acids, they cannot be synthesized by the human body and must be obtained through diet or supplementation. They are commonly used in sports nutrition, clinical nutrition for muscle-wasting conditions, and sometimes in cosmetic formulations for skin barrier support.

How much to take

Typical amount
5-20 grams daily, often taken around workouts. Typical ratio is 2:1:1 (Leucine:Isoleucine:Valine).
Suggested range
5-20 g per day

Potential benefits

Benefits linked to this supplement form:

Muscle Preservation

Research strength: Moderate

 Reduced Soreness

Research strength: Moderate

 Muscle Protein Synthesis Stimulation

Research strength: Very strong

 Reduced Exercise-Induced Muscle Soreness

Research strength: Strong

 Support in Muscle-Wasting Conditions

Research strength: Moderate

 Potential Skin Barrier Support

Research strength: Early

Things to watch for

Possible side effects linked to this form:

Fatigue

How serious: Mild

 None

How serious: None

 Gastrointestinal Discomfort

How serious: low

 Potential Interaction with ALS/Liver Disease

How serious: medium

Health goals

Needs and goals this form may help with:

Other forms of BCAAs

Compare absorption and active amounts with sibling forms:

BCAA Capsules
BCAA Capsules/Tablets

Commonly used for muscle support, exercise recovery, and athletic performance.
BCAA Powder
BCAA Powder (Free-Form)

Supports muscle recovery, reduces exercise-induced soreness, and aids muscle pro...
Hydrolyzed Whey Protein

Rapidly absorbed protein source; supports muscle recovery & growth; used in shak...
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Technical details â–¼

Chemical ID (CAS)

Leucine: 61-90-5, Isoleucine: 73-32-5, Valine: 72-18-4

Formula

Leucine: C6H13NO2, Isoleucine: C6H13NO2, Valine: C5H11NO2

Physical properties

Typically appears as a white to off-white crystalline powder. Soluble in water, with a characteristic bitter taste. Hygroscopic (absorbs moisture from air). Melting points: Leucine ~293°C, Isoleucine ~284°C, Valine ~315°C.

How it’s made

Primarily produced via microbial fermentation using genetically modified bacteria (e.g., Corynebacterium glutamicum, Escherichia coli). Substrates like glucose or molasses are fermented, followed by downstream purification steps including filtration, ion exchange, and crystallization. Synthetic chemical synthesis is less common due to cost and chirality control.