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Cla3.0
CLA Research
Mostly mechanism / observational
141 peer-reviewed studies
What the evidence says
Mostly mechanism / observational
Most CLA studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality meta-analyses and randomised trials published 2000–2025 with a typical study size of 1,476 participants.
Based on 141 studies · 21 meta-analyses · 115 RCTs · 5,700 total participants
Confidence
High confidence
By outcome
Weight managementSmall, inconsistent fat-mass reduction (~1-1.3 kg over months) of uncertain clinical relevance; no reliable effect on body weight · 3-6 months (if any)
Mostly mechanism / observational34 studies
Safety profile
Too few graded studies2 studies
Muscle strength & powerSome trials hint at a tendency to preserve/increase lean mass, but data are weak and inconsistent · Unknown
Too few graded studies1 study
Steady research
15 studies in the last 5 years · Latest meta-analysis: 2024
200020122025
1Meta-Analysis2023
Rastgoo S, Shimi G, Shiraseb F, Karbasi A, Ashtary-Larky D, Yousefi M · Front Immunol (2023)
In plain English: Future research should focus on personalized approaches to CLA supplementation, considering genetic and lifestyle factors for tailored nutritional guidance.
Rajendran M, Palani S, Singh TG, Oliver B, Dua K, Subramaniyan V, Narayanan K. · Food science & nutrition (2025)
Preclinical and clinical studies suggest that CLA may promote fat oxidation and modulate adipocyte function; however, inconsistent findings highlight dose-dependent outcomes and individual variability in response.
The dual nature of CLA, showing both beneficial and adverse effects, raises questions about its long-term safety and efficacy.
This review critically examines CLA's molecular role in obesity and metabolic regulation, providing insights into its therapeutic promise and limitations.