Hormonal
Leptin and insulin act as redundant but complementary adiposity signals to the central nervous system (CNS), specifically the ventral hypothalamus, to regulate long-term body fat stores by modulating neuropeptide expression (NPY/AgRP and POMC/CART).
Your body uses hormones like leptin and insulin to defend a specific body fat level. When you lose weight, these signals drop, triggering hunger and reducing energy expenditure to regain the lost fat. Sustainable weight management requires understanding that this is a biological defense mechanism, not just a lack of willpower.
This review summarizes old and recent data implicating insulin and leptin as key circulating signals to the central nervous system, particularly the ventral hypothalamus, in communicating the size and the distribution of body fat stores. This input ultimately alters food intake and energy expenditure to maintain constancy of the adipose depot.
Why this rating
Based on a comprehensive review of decades of animal models (mice, rats, baboons) and human physiological data, though direct human therapeutic trials are limited.
Source
Leptin and Insulin Action in the Central Nervous System
Daniel Porte et al. · Nutrition Reviews · 2002
DOI 10.1301/002966402320634797
More from this paper
- CNS insulin action is dependent on intact leptin signaling, and leptin's effects on energy expenditure are mediated through melanocortin receptors (specifically MC4R).Good
- Short-term meal satiety signals (like CCK) are modulated by the strength of long-term adiposity signals (insulin and leptin); higher adiposity signals increase sensitivity to satiety cues, reducing meal size.Good
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 →