Iron is vital for the health of your body, and every cell depends on it. You need iron in order for oxygen to be carried from your lungs to the rest of your body.

Hyperthyroidism causes your thyroid gland to produce too much hormone, which speeds your metabolism, leading to interference with your heart health, bone health and moods.

Before you throw out a banana because it has turned brown and seems past its eating prime, consider the potential nutritional benefits it provides. A brown banana has a higher level of antioxidants than yellow or green, unripe bananas.

Fish oil capsules come in a variety of forms; some are more palatable than others. Drinking milk is one possible way to mask the taste and reduce the fishy aftertaste.

Vitamins and minerals are essential for proper development and function of the body. Vitamins fall into two categories: those that are water soluble and those that are fat soluble. The length of time a vitamin will remain in the body will depend on which category it falls in.

Dates, sometimes called palm fruit or date palms, are native to dry, arid climates such as the desert. The fruit of the palm tree, dates can be eaten fresh but are more commonly dried and eaten as is, or they can be used to make smoothies or in stews where they add a rich sweetness.

Many people rely on caffeine, a substance that's absorbed quickly, for energy. Some people, however, are sensitive to caffeine or don't want to include it in their diet.

Lemon juice can both hurt and help male fertility, depending on how it is used. The nutrients in this juice -- including vitamin C and thiamin -- may boost fertility, although applying it directly to sperm may have deleterious effects.

Pills, powders, shakes -- Americans are willing to do whatever it takes to lose weight, even risk unpleasant odors emitting from their bodies. High-fat, low-carb diets such as the Atkins diet, also referred to as ketogenic diets, induce ketosis, which causes you to lose your appetite.

Ringing in your ears can be caused by hearing loss, trauma, earwax blocking the ear canal, medications, ear infections or some medical disorders, such as Meniere’s disease.

How long a particular food takes to digest depends primarily on its macronutrient makeup. Of the three macronutrients, carbohydrates digest the quickest, while fats are the slowest to digest. Pasta is primarily made up of carbohydrate with some protein and a trace amount of fat.

A 6-ounce portion of sirloin steak is twice as big as a usual 3-ounce portion -- which is about the size of a deck of cards or the palm of your hand, according to MedlinePlus. Eating a 6-ounce, protein-rich sirloin will help you achieve -- or exceed -- your daily protein needs.