It's hard to avoid that 3 p.m. stomach rumble, when nothing can stand between you and the office vending machine. And while it's fine to eat something to hold you over until dinner (in fact, we encourage it!), some choices will help you keep on your weight-loss track—while others can surely derail you. So at the vending machine, instead of choosing that ever-so-tempting pack of Twizzlers, try a 100-calorie cookie pack or a Nature Valley granola bar. Better yet, bring a snack from home! We're fans of sliced veggies dipped in hummus. Delish!


The ketogenic, or "keto," diet — which first became popular in the 1920s as a treatment for epilepsy and diabetes— limits carbohydrates to no more than 50 grams a day, which is the rough equivalent of a plain bagel or a cup of white rice. By comparison, dietary guidelines laid out by the US Department of Agriculture recommend consuming between 225 and 325 grams of carbs a day.

Research to determine the appropriate amount of nutrients for health began in the 1940s because men were being rejected from the military during World War II due to the effects of poor nutrition on their health. The first Food and Nutrition Board was formed to evaluate the nutritional intakes of large populations. Since then, the Food and Nutrition Board has undergone many changes and published comprehensive guidelines on nutrition for both maintenance of good health and disease prevention.

Vitamin D is needed for healthy bones by maintaining normal blood levels of calcium and phosphorus and for maintenance of a healthy immune system. A deficiency in children can result in rickets, and a deficiency in adults can cause osteomalacia. An inadequate diet, limited exposure to sunlight, and malabsorption can cause the deficiency. Dietary sources of vitamin D are
Having ready-to-eat snacks and meals-in-minutes on hand sets you up for success. You'll be less likely to hit the drive-through or order a pizza if you can throw together a healthy meal in five or 10 minutes. Here are some essentials to keep on hand: frozen vegetables, whole-grain pasta, reduced-fat cheese, canned tomatoes, canned beans, pre-cooked grilled chicken breast, whole grain tortillas or pitas, and bags of salad greens.
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