Hormonal
Postprandial administration of para-tyramine-O-sulphate (pTOS) acts as a conserved anorexigenic gut-brain signal that suppresses food intake and body weight in mice by activating ventromedial hypothalamus (VMH) neurons, without affecting energy expenditure or gastric emptying.
This research identifies pTOS, a metabolite produced by gut bacteria from dietary tyrosine, as a natural signal that tells your brain to stop eating. In mice, supplementing with pTOS reduced food intake and body weight without changing how much energy they burned or how fast their stomach emptied. The effect works by activating specific neurons in the hypothalamus. While human studies show pTOS levels rise after meals, the clinical application for weight loss is still in early stages, particularly for those with diabetes.
Together, these data uncover a conserved postprandial anorexigenic metabolite that links nutrient intake to energy balance.
Why this rating
Strong mechanistic evidence in mice (genetic silencing, electrophysiology) and observational data in humans/pythons, but human clinical efficacy data is limited to observational meal tests.
Source
Python metabolomics uncovers a conserved postprandial metabolite and gut–brain feeding pathway
Shuke Xiao et al. · Nature Metabolism · 2026
DOI 10.1038/s42255-026-01485-0
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →