Harvard Health Content API

Does stress really turn hair gray? Scientists conducted experiments that simulated stress and led to gray hair—in mice, which does not mean it’s true for humans, regardless of what you may have heard in the media.

What prompts a woman to become a surrogate or gestational carrier, carrying a child for people she may not know? The answers seem straightforward in some instances and more complex in others.

An analysis of research suggests those who run regularly –– regardless of pace, distance, or amount of time –– are more likely to live longer and have a lower risk of cardiovascular disease or cancer.

Neuromodulation therapies use a targeted stimulus to help people manage pain. This can be in the form of an electrical stimulation device or a pump containing medication, either of which can be implanted in the body.

There is good evidence that the more you drink, the more likely you are to develop atrial fibrillation. A study found that people with afib who were willing to abstain from alcohol were less likely to have a recurrence.