Caffeine can kick start your senses within 15 minutes. See exactly what caffeine does to your body with this interactive graphic.

Lead is a naturally occurring metal, which has been used by humans for centuries because of its versatility. However, as our knowledge of the effects of lead on human health has developed, it has ...

What is lead poisoning? Lead poisoning occurs when the body accumulates excessive levels of lead over extended periods, often months or even years.

Most of the biggest effects to your body from breast cancer come from the treatment, not from the disease. Find out what to expect.

Why is extreme heat so risky? Exposure to excessive heat can have wide-ranging impacts on anyone, from the direct effects of heat on the body to the worsening of existing conditions.

Hypothyroidism can affect many different aspects of the body. Learn more about how it affects certain systems here.

It’s normal to lose lean mass, including muscle, during any type of weight loss intervention, but too much muscle loss can be a problem.

Often called the “love hormone” or the “cuddle hormone,” oxytocin promotes feelings of love, bonding, and well-being.

Worrying can lead to high anxiety, which can trigger physical illness. Learn more from WebMD about how excessive worrying can affect your health - and how to manage it.

How exactly does Adderall help you concentrate better? Discover the effects of Adderall on your body.