This article was reviewed by Felix Gussone, MD. Key Takeaways: Hormones like insulin, cortisol, thyroid hormones, and testosterone play a direct role in metabolism, appetite, and … ...

Weight fluctuation happens daily, week to week, or month to month. Learn about causes and when to see a healthcare provider about weight changes.

"Cortisol belly" is a popular term used to describe weight gain mostly around your belly area, or abdomen. Sometimes it's called "hormonal belly." It’s not a medical term or diagnosis, but it could be ...

You're in your mid-40s, eating healthy and exercising regularly. It's the same routine that has worked for years.

Festive weight gain isn't just about overeating, it's driven by hormonal shifts, sleep disruption, and metabolic changes that ...

Weight gain single-handedly prevented by a gut microbe By Michael Franco December 18, 2025 This composite image shows the rod-shaped Turicibacter bacterium in the foreground, with a cross-section of ...

Some people with hyperparathyroidism may notice weight gain or weight loss. These changes may occur due to factors like underlying medical conditions or appetite changes. Hyperparathyroidism is ...

With the holidays behind us, many Americans are seeing the numbers on the scale go up a pound or two. In fact, data shows that many American midlife and older adults gain 1 to 1.5 pounds over the ...