Definition

Ghrelin is secreted primarily by specialized cells in the stomach lining and acts on the hypothalamus to stimulate hunger, increase food intake, and promote fat storage — particularly visceral fat. Ghrelin levels rise sharply before meals and after weight loss, which is a primary biological driver of post-diet weight regain: the body responds to caloric restriction by increasing ghrelin, making sustained caloric deficit biologically uncomfortable. Ghrelin also rises significantly with sleep deprivation, stress, and crash dieting. GLP-1 receptor agonists partially counteract ghrelin’s appetite-stimulating effects by working on the same hypothalamic pathways.

Frequently Asked Question

Why Ghrelin Matters

Ghrelin is a major reason why 'just eat less' fails as a long-term weight loss strategy. After significant caloric restriction, ghrelin elevations can persist for years — the body is biologically programmed to recover its prior weight. Understanding this helps patients reframe their experience of hunger during weight loss and validates the need for clinical support rather than more willpower.

How Spokmed Company Uses It

SPOKEmed addresses ghrelin dysregulation through structured meal timing (eating every three hours reduces ghrelin spikes between meals), sleep optimization, and GLP-1 therapy when indicated. The goal is to work with hunger hormones rather than fight them through sheer behavioral control.

"Ghrelin" Appears in These Categories