Nature's Plus Source Of Life Garden Vitamin B12 provides you with an impressive 1000mcg of Vitamin B12, that is 16,667% of the recommended daily allowance (RDA). It is present in the highly absorbable methylcobalamin form. This food supplement also contains all of the other B vitamins, including thiamin, riboflavin, niacin, Vitamin B6 folic acid, vitamin B12, biotin and pantothenic acid. Vitamin B12 is required for the proper function and development of the brain, nerves, blood cells and many other parts of the body. Symptoms of vitamin B12 deficiency include fatigue, muscle weakness, shortness of breath, dizziness, numbness, heart palpitations, bleeding gums and mouth sores, nausea and poor appetite. Nature's Plus Source Of Life Garden Vitamin B12 is certified organic, gluten free and is also suitable for vegan and vegetarian diets.