Research

Hormonal

Oral ingestion of capsinoids (non-pungent capsaicin analogs) increases whole-body energy expenditure and reduces abdominal fat in humans with metabolically active brown adipose tissue (BAT) through the activation of the TRPV1-SNS-BAT axis.

If you have detectable brown fat, taking capsinoids (6-9 mg daily) may help slightly reduce abdominal fat and increase energy expenditure. However, if you do not have active brown fat, this supplement will likely have no effect on your metabolism. It is safe for long-term use.

GoodConditionalHIGH confidence
our team (111) found that a single oral ingestion of capsinoids increases EE in individuals with metabolically active BAT, but not in those without it... daily ingestion of capsinoids for 6 weeks augments CIT in individuals with low BAT activities... after a 12-week oral ingestion of capsinoids, a slight but significant reduction of abdominal fat was observed in a group of obese individuals
Masayuki Saito et al. · Frontiers in Endocrinology · 2020

Why this rating

The paper cites multiple human studies (single and chronic ingestion) showing consistent results in BAT-positive individuals, though sample sizes in cited studies vary.

Source

Brown Adipose Tissue, Diet-Induced Thermogenesis, and Thermogenic Food Ingredients: From Mice to Men

Masayuki Saito et al. · Frontiers in Endocrinology · 2020

DOI 10.3389/fendo.2020.00222

narrative_reviewCited 234×
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DOI resolved against Crossref · corpus check 2026-06-10

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