B-12 is vital for energy and red blood cell production. It is also essential for nerve and mental function, and cardiovascular health. Vegetarians, vegans, bariatric patients and seniors tend to lack B-12, although this nutrient is vital for everyone. Methylcobalamin is the coenzyme form of Vitamin B-12 and is the form that exists in the body. Other forms of B-12 require some amount of conversion once they are consumed; methylcobalamin needs no conversion. It is the most active, effective, bio-available form. McGuff proudly offers this lozenge in both a 1000 mcg (#8557) and 3000 mcg #8608). Our 3000 mcg also contains B-6, Folic Acid, and Biotin, essential water soluble B Vitamins. View Product Information Sheet (PDF)