Vitamin D: Over the past decade, dozens of studies have revealed many important roles for vitamin D, the nutrient that skin cells produce when they are exposed to sunlight. The recommended daily intake of Vitamin D is 600 IU per day, although recommended levels are under review. If you avoid the sun or live in the northern half of the U.S., ask your doctor whether your vitamin D level should be tested.

WASH interventions were typically community-based. WASH interventions were delivered to households and communities through community mobilization, mass media, home visits, and infrastructural development (126, 130, 136–138). There were some examples of facility-based delivery of WASH interventions, such as in health clinics and schools (139, 140); however, this was not representative of the majority of delivery platform coverage. Health clinic delivery platforms had limited reach, often targeting pregnant women and women with young children. In an evaluation of WASH interventions delivered in India (141), more demanding behavioral practices, such as handwashing and consistent use of latrines, required more intense contact (e.g., multiple home visits) than less intense interventions, such as sweeping of courtyards, that could be effectively delivered in small group meetings such as those in health clinics and community centers. More research is needed to evaluate the benefits and barriers of different delivery platforms for women across the life course.

Getting enough water also is important. Many experts recommend at least eight 8-ounce glasses of water daily—more if you exercise frequently or are exposed to extremes of heat and cold. The 2010 Dietary Guidelines for Americans emphasize drinking more water and other calorie-free beverages, along with fat-free or low-fat milk and 100 percent fruit juices, instead of calorie-packed regular sodas.