Vitamin B12 is present in foods of animal origin, including dairy products and eggs. Thus, vegetarians are more susceptible to a dietary deficiency of this important nutrient.Likewise, vitamin B12 serum concentrations are reported to be significantly lower in elderly population groups compared to younger groups. Methylcobalamin is the form of vitamin B12 active in the central nervous system. It is essential for cell growth and replication. In some people the liver may not convert cyanocobalamin, the common supplemental form of vitamin B12, into adequate amounts of methylcobalamin needed for proper neuronal functioning. Methylcobalamin may exert its neuroprotective effects through enhanced methylation, acceleration of nerve cell growth, or its ability to maintain already healthy homocysteine levels. Dosage:Dissolve in mouth or chew one (1) lozenge 1 to 8 times daily, or as recommended by a healthcare practitioner. Warnings: KEEP OUT OF REACH OF CHILDREN DO NOT EXCEED RECOMMENDED DOSE Do not purchase if outer seal is broken or damaged. When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.