Gastric sleeve helps you lose weight through two main mechanisms:
One of them is purely mechanical (reducing the amount of food the stomach can accommodate), and the other is hormonal or chemical (appetite suppression).
Let’s speak about these two mechanisms in a nutshell.
The mechanical mechanism is basically the significant reduction of the size of the stomach after gastric sleeve procedure, which decreases the amount of food that a person can consume before feeling full.
The hormonal factor is the major change that happens to the levels of hormones that control appetite after sleeve gastrectomy, for example, a significant decline in the levels of ghrelin -which is the hunger hormones- was observed secondary to the excision of the gastric fundus. This change results in suppression of appetite.
Gastric sleeve also increases the secretion of another hormone called: glucagon-like hormone-1 or GLP-1, which increases insulin secretion and delays gastric emptying and this also reduces hunger cravings and suppresses appetite.