Harvard Health Content API

People who engage in leisure-time physical activity can extend their lives by as much as four years, compared with similar-weight people who do no such activity. Being active and also maintaining a healthy weight boosts longevity by more than seven years.

Ophthalmologists can now perform cataract surgery using lasers instead of scalpels to make incisions. Three-dimensional imaging provides the precise measurements needed for laser use.

New guidelines make hormone therapy acceptable for short-term use in healthy women up to age 59 or within 10 years of menopause with marked menopausal symptoms. It’s not acceptable for long-term use.

Tomatoes may help lower your risk of ischemic stroke. Lycopene is a powerful antioxidant that may reduce inflammation and cholesterol, improve immune function, and prevent blood from clotting.

Dermatologists now have official guidelines for Mohs surgery, a procedure that removes skin cancer while minimizing damage to surrounding healthy tissue. Smaller, more superficial skin growths may not be right for Mohs surgery.