When you're hungry, ghrelin hormone levels increase in your stomach and other parts of your body. Learn what causes its ...

Lactation triggers significant metabolic changes in mothers, driven by shifting hormone levels and brain activity.

People who eat sugar substitutes in an effort to lose or control their weight could be making matters worse, if recently published research in the journal Nature Metabolism is anything to go ...

That second wave of energy is a normal part of the human circadian rhythm, but lifestyle factors also play a role.