Synergistic Effects of Bioactive Compounds on Human Adiposity Mechanisms of Fat Loss and Fat Accumulation.

Adipose tissue plays a crucial role in regulating metabolic health in humans, where both an excess and a deficiency can lead to chronic diseases. Bioactive compounds derived from food like polyphenols, alkaloids, terpenoids, peptides, and fibers have been recognized as significant influencers of fat metabolism. They operate through various molecular and systemic pathways, facilitating either adiposity reduction or fat accumulation based on the physiological context. This review consolidates recent progress in comprehending the mechanisms through which these compounds affect lipolysis, adipogenesis, thermogenesis, and appetite regulation. We emphasize the collaborative effects that enhance bioactive efficacy and examine findings from clinical trials focused on obesity, cachexia, and sarcopenia. For example, co-administration of curcumin with piperine increased curcumin bioavailability up to 20-fold, and epigallocatechin gallate (EGCG) combined with caffeine modestly enhanced 24-h energy expenditure by 4% in humans. Similarly, omega-3 fatty acids combined with vitamin D supplementation improved lean mass by 1.2 kg in sarcopenic adults in recent meta-analyses. New platforms in personalized nutrition-combining genomics, microbiome analysis, and AI-driven meal planning-present exciting opportunities for tailored applications. In conclusion, we address significant translational challenges and prospective pathways, focusing on enhancing bioavailability, standardizing outcomes, and ethically expanding personalized interventions. This work highlights the promise of bioactives as effective means for influencing adipose biology and enhancing metabolic health.