William Sears received his training at Harvard Medical School's Children's Hospital and Toronto's Hospital for Sick Children. He has practiced pediatrics for 30 years and is associate clinical professor at the University of California, Irvine, School of Medicine. More than ten years ago, he was diagnosed with cancer, and it was a wake-up call for him to change his way of living. He and his wife Martha, a registered nurse, childbirth educator, and health consultant, are the authors of more than 30 books. The major theme of Prime-Time Health is self-care and covers aging, a journey through your body, and wise ways to eat, sleep, manage stress, and enjoy better sex. It is aimed at men and women over 50 who are in a prevent mind-set (keeping in shape to ward off wearing out) and to prime-timers who are in the repair mode and looking forward to living a longer life.

Healthy aging, according to Sears, is built around making the most out of four factors: lifestyle (how we live), exercise (how we move), attitude (how we think), and nutrition (how we eat). Early on, he suggests that the reader make health a hobby. Then there's this wise counsel: "Eat twice as often, eat half as much, and chew twice as long. When you eat more often, in smaller minimeals — a pattern called grazing — you won't feel hungry or uncomfortably full." This doctor is also big on antioxidants which are present in seafoods, salads, and smoothies.

Sears shares secrets of centenarians, ways to keep a healthy heart, strategies for staying smart and protecting your brain, being good to your gut, eating well with sixteen superfoods, rejuvenating your joints, and staying lean. This excellent resource filled with valuable health tips ends with suggestions for "Putting Together Your Personal Eight-Week Prime Time Plan."