Hormonal
Resveratrol improves metabolic health and insulin sensitivity by activating SIRT1 and AMPK pathways, leading to increased energy expenditure and lipid mobilization, although its clinical efficacy is limited by extremely low systemic bioavailability due to rapid metabolism.
Resveratrol activates metabolic pathways like SIRT1 in lab settings, but in humans, it is metabolized so quickly that very little reaches your tissues. While it may offer minor metabolic benefits, it is not a magic bullet for weight loss or insulin sensitivity due to poor bioavailability. Focus on diet and exercise instead.
Resveratrol has been described as mimicking caloric restriction, leading to improved exercise performance and insulin sensitivity (increasing energy expenditure), as well as having a body fat-lowering effect by inhibiting adipogenesis, and increasing lipid mobilization in adipose tissue... Given its low bioavailability and extensive metabolism, clinical studies using resveratrol have not always replicated in vitro observations.
Why this rating
The paper is a review highlighting extensive in vitro and animal data but explicitly states that clinical studies often fail to replicate these findings due to bioavailability.
Source
Resveratrol and Its Human Metabolites—Effects on Metabolic Health and Obesity
Margherita Springer et al. · Nutrients · 2019
DOI 10.3390/nu11010143
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