Leptin and Ghrelin:
These hormones regulate hunger and satiety. Leptin signals fullness to the brain, while ghrelin stimulates appetite.
High insulin levels can lead to fat storage, while improved insulin sensitivity supports weight loss.
The stress hormone cortisol can lead to fat accumulation, particularly around the abdomen.
Thyroid hormones influence metabolism. An underactive thyroid (hypothyroidism) can slow metabolism and lead to weight gain.
Estrogen and Testosterone:
Hormonal imbalances, such as low estrogen in women or low testosterone in men, can affect body composition.
This hormone helps regulate glucose and fatty acid breakdown, potentially influencing weight loss.
Promotes fat breakdown and muscle growth, which can aid in weight loss.
Affects mood and appetite control. Low serotonin levels may lead to overeating.
Norepinephrine and Epinephrine:
These "fight-or-flight" hormones can temporarily boost metabolism and fat burning.
Peptide YY (PYY) and GLP-1:
These hormones help control appetite and may play a role in reducing food intake during weight loss efforts.