For example, some ingredients may be safe in products such as cleansers that we wash off the skin immediately, but not in products that we leave on the skin for hours. Similarly, ingredients that are safe for use on the hair or nails may be unsafe when used on the skin or near the eyes.
Carbohydrates are the main energy source for the brain. Without carbohydrates, the body could not function properly. Sources include fruits, breads and grains, starchy vegetables and sugars. Make at least half of the grains you consume whole grains.
Energy Supply. Carbohydrates are the primary source of energy in the body. They are easy to digest and provide readily available energy that you need not only for physical activity, but for fueling all cellular and metabolic processes. Protein can be a source of energy, but it is not the body's preferred source.