Dry skin is rarely cancer, but some persistent patches can be. Learn which warning signs are worth a doctor's visit and which you can safely moisturize away.
White blood cells are made of membranes, proteins, and specialized internal structures that vary by type, helping each cell carry out its unique immune role.
Osteopenia and osteoporosis both affect bone density, but they differ in severity, fracture risk, and how they're treated. Here's what you need to know.