"If you've ever stepped on the scale and wondered, ‘Why am I gaining weight so fast?", know that you're not alone," assures Sean Bourke, MD, Founder and Chief Medical Officer of JumpstartMD.

Estrogen levels dip during perimenopause and menopause, causing unwanted changes like weight gain around the belly. Hormonal shifts, muscle loss, stress, decreased physical activity and poor sleep all ...

Add Yahoo as a preferred source to see more of our stories on Google. And as it turns out, some of the sneakiest reasons for sudden weight gain are related to your hormones. Here, the top culprits and ...