Conjugated Linoleic Acid (CLA)
Also known as: CLA, cis-9,trans-11 CLA, trans-10,cis-12 CLA, rumenic acid
Effective Dosage
3.2 g daily based on available clinical trial data
What the Science Says
Conjugated Linoleic Acid (CLA) is a naturally occurring fatty acid found in dairy products and meat from ruminant animals. In clinical trials at 3.2 g/day over 12 weeks, CLA showed a modest ability to preserve muscle mass — particularly in the trunk — in adults with high body fat, and appeared to suppress a fat-production process in the body called de novo lipogenesis. Early-stage research also suggests CLA may have anti-inflammatory effects relevant to gut and immune health, though these findings are largely preliminary or from animal studies.
What It Doesn't Do
Won't melt fat on its own — clinical trials show no significant fat loss compared to placebo. Not a proven weight-loss supplement despite heavy marketing as one. The muscle-preserving effect is modest and may only apply to certain groups. No solid human evidence it prevents cancer or treats autoimmune disease. Nebulized CLA for COVID-19 is experimental with no controlled trial data.
Evidence-Based Benefits
Conjugated Linoleic Acid (CLA) has been shown to potentially aid in weight loss and body composition improvement by promoting fat oxidation and reducing body fat mass. Some studies suggest it may also have beneficial effects on metabolic health and insulin sensitivity.
Strong EvidenceEffective at: 3-6 g daily
Source: auto-research
Absorption & Bioavailability
Unknown from provided studies — no pharmacokinetic data reported in the provided papers. CLA is a dietary fatty acid and is generally absorbed via normal fat digestion pathways.
Red Flags to Watch For
- Clinical trial results for body composition are inconsistent — effects appear modest and may not apply to all populations
- Most immune and anti-inflammatory findings come from animal models or very small pilot studies (n=15), not large human trials
- Nebulized CLA for respiratory infections is experimental and not FDA-approved — only a small retrospective case series exists
- Hair loss and nanovesicle applications are entirely pre-clinical (mouse models) with no human data
- Over 1,000 supplement products on the market despite limited strong human evidence — marketing often overstates benefits
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: 2026-04-06