Cortisol is essential to health. Our bodies normally produce cortisol throughout the day in a cycle—more in the morning as we wake, less in the evening to prepare us for sleep—to support our daily physical and emotional well-being. But when cortisol levels become higher or lower than normal for prolonged periods, that wellbeing can be severely compromised.

After years of warnings from doctors, public health campaigns, and loved ones, women know to be on their guard when it comes to osteoporosis. Too many of us have seen the toll that osteoporosis can cause up close, and chances are that you’re motivated to do everything you can to age gracefully and stay healthy. But many women underestimate the impact of menopause on their risk of developing osteoporosis.

Low testosterone, also known as low-T, can occur as a result of injury, surgery, or chronic illness and cause a host of symptoms that compromise your quality of life. But the most common cause of low testosterone isn’t an accident or illness— it’s aging. And the symptoms are no less serious because they’re driven by a natural process.

It’s common wisdom that you gain weight when you regularly eat more calories than you use through physical activity and normal body functions. Yes, it’s true that losing weight means eating fewer calories and burning more energy through physical activity. It sounds simple, but an estimated 160 million Americans are overweight or obese.