Research

Hormonal

Treatment with trans-10,cis-12 conjugated linoleic acid (CLA) reduces triglyceride accumulation in human preadipocytes by decreasing insulin-stimulated glucose uptake, glucose oxidation, and oleic acid uptake/oxidation, while downregulating PPARγ expression and target genes.

This research indicates that a specific form of CLA (trans-10,cis-12) can reduce fat storage in human fat cells by slowing down how they process sugars and fats. However, this was done in a lab dish, not in people. Do not expect this to cause weight loss on its own. It suggests that not all CLA supplements are created equal, and some may even work against fat loss goals by reducing metabolic activity in fat cells.

ModerateSupportsMEDIUM confidence
trans-10,cis-12 CLA decreased insulin-stimulated glucose uptake and oxidation, and reduced insulin-dependent glucose transporter 4 gene expression... trans-10,cis-12 CLA reduced oleic acid uptake and oxidation... trans-10,cis-12 CLA decreased, whereas cis-9,trans-11 CLA increased, the expression of peroxisome proliferator-activated receptor gamma (PPARgamma)... Collectively, trans-10,cis-12 CLA decreased glucose and lipid uptake and oxidation and preadipocyte differentiation by altering preadipocyte gene transcription in a manner that appeared to be due, in part, to decreased PPARgamma expression.
J. Mark Brown et al. · Journal of Lipid Research · 2003

Why this rating

In vitro study on primary human cells; high relevance to human biology but lacks in vivo clinical confirmation of fat loss.

Source

Isomer-specific regulation of metabolism and PPARγ signaling by CLA in human preadipocytes

J. Mark Brown et al. · Journal of Lipid Research · 2003

DOI 10.1194/jlr.m300001-jlr200

mechanism_onlyCited 222×
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DOI resolved against Crossref · corpus check 2026-06-10

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