All living things require proper nutrition. Due to the complexity and the functionality of the human body, humans need a variety of vitamins and minerals in order to operate on an optimal level. Vitamin supplements are an excellent source of significant nutrients that might not be available in sufficient quantities in a normal diet.
One-A-Day Vitamins
Oneaday.com states the One-a-Day Essential multivitamin contains 100 percent of 10 important vitamins needed in each day. Among these vitamins are vitamin A, a variety of B vitamins, vitamin C, vitamin D and vitamin E. These vitamins, as well as a host of others in the One a Day Essential pill, are vital to physical wellness and operation. Each vitamin has a specific role within the body and is necessary to maintaining a healthy lifestyle.
Vitamin A
There are 3,000 international units of vitamin A in one One-a-Day Essential pill. Ohio State University reports that vitamin A, or retinol, has at least eight different functions within the body. It assists with vision, growth, development, hair and skin maintenance and development, proper immune function, mucous membrane operation and reproduction. Vitamin A can be found in vegetables and some dairy products.
B Vitamins
One-a-Day pills contain a number of B vitamins. B vitamins are commonly used in combination with each other. According to the Mayo Clinic, vitamin B6 helps to synthesize neurotransmitters in the brain, which allows the effective release of chemicals in the brain, specifically serotonin and norepinephrine. B12 vitamins provide material to make DNA and help maintain healthy nerve and red blood cells.
Vitamin C
The human body does not manufacture its own Vitamin C. This nutrient must be obtained through diet or supplementation. A One-a-Day pill contains 60mg of vitamin C. The current United States Department of Agriculture (USDA) recommended dietary allowance is 75 mg. for women and 90 mg. for men. The Mayo Clinic states that vitamin C can be found in fruits and vegetables, especially citrus fruits such as oranges.
Vitamin C performs many functions, including muscle and cartilage formation. This essential nutrient has been suggested as an aid to the common cold, though the evidence is controversial. A lack of vitamin C can cause scurvy, which may result in death. The USDA warns that many Americans have difficulty obtaining adequate amounts of Vitamin C through diet alone.
Vitamin D
The cells in the human body can convert ultraviolet-B rays produced by the sun into vitamin D. Vitamin D is also found in foods, such as dairy products, fish, and eggs but many diets fall short of the recommended daily allowance of 400 international units (IU). Vitamin D helps keep blood levels of calcium and phosphorous within normal limits. It also works alongside calcium to strengthen teeth and bones. A One-a-Day pill has the recommended dosage of 400 (IU) of vitamin D.
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