Kate Middleton’s treatment; exercise and digestion; why are more younger people getting colon cancer? Plus, are we drinking water all wrong?

This week ... we examine Kate Middleton’s treatment for cancer, discover how high-intensity exercise may mess with your digestion, eat the peels from fruit, and ask: are we drinking water all wrong?

Another reason to exercise? Yes (but be careful)!

Everything in moderation. Yes, moderate exercise is generally good for your gut—and your digestion. Caution, however, should accompany high-intensity efforts, we discover.

After cancer diagnosis, what Kate Middleton did

Britain’s Princess Catherine has been at the center of a media frenzy with her health and her treatment. What is “preventative chemotherapy”? Experts explain what we can learn about cancer treatment from the experience.

How cravings attack your brain

We're learning more about the cravings that fuel self-defeating addictions—and how new discoveries can help us kick those habits. Like what discoveries? Some are trying experimental treatments, like the application of electromagnetic pulses to a prefrontal cortex.

Why do we age?

Whether driven by an internal clock in our genes or a lifetime of wear and tear, aging often can be mitigated through lifestyle choices. Biology is not destiny, experts tell us.

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• Schizophrenia in women is widely misunderstood—and misdiagnosed
• Are we drinking water all wrong? How much do we really need?