Insulin

Insulin is a hormone that helps move glucose from the blood into cells and coordinates how the body handles energy after eating.

What insulin does

After a meal, blood glucose can rise. Insulin helps many tissues take up glucose and helps the body store or use incoming energy.

Insulin is not only a “fat storage hormone”; it is part of normal fuel management.

Carbohydrates and insulin

Carbohydrate-rich foods usually raise insulin more directly because they raise blood glucose. Protein can also stimulate insulin, especially when eaten as part of a mixed meal.

Practical view

Food amount, food quality and activity all matter.
Fibre-rich foods usually produce a slower glucose response.
Regular movement improves how muscles use glucose.

Source

NCBI Bookshelf : Physiology of glucose transport and GLUT4.
WHO healthy diet : Healthy diet fact sheet.