L-BAIBA

Also known as: L-Beta-Aminoisobutyric Acid, L-β-aminoisobutyric acid, (S)-β-aminoisobutyric acid, MitoBurn, beta-amino-isobutyric acid

Evidence under review. — Not yet rated

Exercise-linked molecule. May reduce hunger, but no proven fat loss or metabolism boost in humans.

What it does

L-BAIBA is a small molecule naturally released by muscles during exercise. In humans, one clinical trial found that 500 mg daily reduced self-reported hunger compared to placebo over 56 days,...
Evidence quality

Evidence base hasn't been formally rated yet. See research below.
Clinical dose

No established dose from provided studies
Found in

Bucked Up Pre-Workout (product line)

See full breakdown ↓ Methodology →

What the Science Says

L-BAIBA is a small molecule naturally released by muscles during exercise. In humans, one clinical trial found that 500 mg daily reduced self-reported hunger compared to placebo over 56 days, though no changes in body weight, fat mass, or resting metabolic rate were detected. Animal studies suggest it may influence fat metabolism and musculoskeletal health, but these effects have not been confirmed in human trials.

What It Doesn't Do

Won't burn fat on its own — the only human RCT found zero change in body composition. Won't boost your metabolism. No proven effect on muscle mass, energy levels, blood sugar, or cholesterol in humans. Animal results don't automatically translate to people.

Evidence-Based Benefits

Reduces perceived hunger in overweight adults following a diet and exercise program.

Weak Evidence

Effective at: 500 mg/day

Supporting studies (click to view on PubMed):

PMID 42271377

Is absorbed into the bloodstream after oral supplementation in healthy adults.

Weak Evidence

Effective at: No established dose from provided studies

Supporting studies (click to view on PubMed):

PMID 36184601

Combined with exercise, may enhance musculoskeletal properties in middle-aged male mice.

Weak Evidence

Effective at: 100 mg/kg/day (animal data only)

Supporting studies (click to view on PubMed):

PMID 41045489

Absorption & Bioavailability

Good — a dose-response absorption study confirmed L-BAIBA appears in human plasma after oral ingestion, with measurable levels across multiple doses. Specific absorption percentages not reported in provided abstracts.

Red Flags to Watch For

The only human RCT found no significant changes in body composition, fat mass, or resting metabolic rate — core claims made by many supplement brands
Most mechanistic research comes from animal studies or psychiatric drug research, not direct supplementation trials in healthy adults
Only 8 registered supplement products in NIH DSLD despite heavy marketing, suggesting limited regulatory scrutiny
The combination product tested (L-BAIBA + Grains of Paradise) also showed no body composition benefit, undermining 'synergy' marketing claims

Products Containing L-BAIBA

See how L-BAIBA is used in these analyzed products:

Bucked Up Pre-Workout (product line)

Supplement

Overhyped

View all product reviews →

Frequently Asked Questions

What does L-BAIBA do?

Exercise-linked molecule. May reduce hunger, but no proven fat loss or metabolism boost in humans.

What is the effective dose of L-BAIBA?

No established dose from provided studies

Is L-BAIBA safe?

The only human RCT found no significant changes in body composition, fat mass, or resting metabolic rate — core claims made by many supplement brands

What doesn't L-BAIBA do?

Won't burn fat on its own — the only human RCT found zero change in body composition.

Research Sources

PubMed
NIH DSLD

This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-09-30