'Yo-yo' Weight Loss Linked To Decline In Muscle Mass

Middle-aged folks have a higher risk of muscle loss if their weight “yo-yos” due to inconsistent dieting, a new study says.

People who repeatedly dropped and regained weight wound up losing nearly four times as much thigh muscle during a four-year period compared to others whose weight remained relatively steady, researchers re...

FDA Advisers Dismiss Safety Warnings, Back Four Peptide Treatments

A panel of outside advisers to the U.S. Food and Drug Administration (FDA) voted Thursday to let specialized pharmacies produce and sell four peptide treatments the agency banned three years ago.

The votes are nonbinding, but they amount to a rebuke of the FDA’s own scientists who said the drugs have not been studied enough to know w...

Frequent Marijuana Use Linked To Higher Stress Hormone Levels

Marijuana may help you unwind — but using it too often could have the opposite effect on your stress response.

Researchers say adults who use pot frequently wake up with higher levels of cortisol, also known as the "stress hormone."

The body releases cortisol when you're under pressure to help regulate blood pressure, blood sug...