Geritol is a multivitamin supplement that provides essential vitamins and minerals. According to geritol.com, the Geritol tonic is a liquid form of the supplement; it contains key vitamins and minerals at high potency levels. The liquid form is beneficial for those who have difficulty with swallowing pills. The main ingredients include thiamine, riboflavin, niacin and iron.
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Thiamine, or vitamin B-1, is one of the essential B vitamins, and is required by the body to properly utilize carbohydrates. The thiamine dosage in liquid geritol is 2.5 mg, or 170 percent of the RDA value. According to Medline Plus, the RDA dose of thiamine for adults is 1 mg to 2 mg. The Natural Medicines Comprehensive Database rates thiamine as effective for treatment of people with problems from certain genetic diseases. It is rated as possibly effective for preventing kidney disease in diabetics, and in cataract prevention.
Riboflavin, or vitamin B-2, is one of the eight B vitamins. It is needed to help the body convert food into fuel, and to help metabolize fats and proteins. Liquid Geritol contains 2.5 mg of riboflavin, or 150 percent of the RDA value; the adult daily recommendation for riboflavin is 1 mg to 1.3 mg. According to the University of Maryland Medical Center, riboflavin works as an antioxidant by eliminating damaging particles in the body, and is also important for red blood cell production.
Niacin is also known as vitamin B-3, or nicotinic acid. It is found in liquid Geritol at 50 mg, or 250 percent RDA value. The recommended daily value for adults is 14 mg to 16 mg. The University of Maryland Medical Center, UMMC, states that niacin helps the body make various hormones in the adrenal glands, is effective in improving circulation and in reducing cholesterol levels. The UMMC also reports that population studies have shown that people with higher intakes of niacin have a lower risk of Alzheimer's disease
Iron is an important mineral, needed for many body functions. The body requires iron to make the proteins found in red blood cells and in muscle cells. Liquid Geritol contains 18 mg of iron, or 100 percent of the RDA value. According to Merck Manuals, iron deficiency is one of the most common mineral deficiencies in the world. Lack of iron causes anemia, or too few red blood cells. Less than 20 percent of iron in a typical diet is absorbed into the body. Oral iron supplements, such as Geritol, may be needed.