B12-Active Chewable 1000 mcg by Integrative Therapeutics

If your Vitamin B12 has tested low or low-normal, or your Methylmalonic Acid or Homocysteine runs high, a 1,000 mcg daily tablet is a common dose for bringing the level up and holding it there. It suits vegans and vegetarians, adults over 50, people on metformin or long-term acid-suppressing medicines, and those who have had weight-loss surgery. If your level is solid and you eat animal foods, you probably do not need this much.

Methylcobalamin is a form of B12 the body uses directly. The other common supplement form, cyanocobalamin, is converted after it is absorbed. B12 is needed to make red blood cells, to maintain the myelin coating on nerves and, with folate, to recycle homocysteine. B12 from food depends on stomach acid and a carrier protein called intrinsic factor. With a dose this size, a small share is absorbed without that carrier, which is why high-dose oral B12 can work even when absorption from food is poor.

Each chewable tablet provides 1,000 mcg of vitamin B12 as methylcobalamin. The label directs adults to take 1 tablet daily: chew it and let it dissolve in the mouth before swallowing. It is cherry flavored and can be taken at any time of day, with or without food. The tablet is sweetened with fructose and mannitol, and the label carries a vegan seal.

B12 has no established upper limit, and the body passes what it does not need. If you take folic acid or methylfolate, make sure your B12 is adequate too, because folate can correct the blood count while a B12 shortfall continues to affect the nerves. Numbness, tingling, balance problems or memory changes need a clinician's assessment, since some people need B12 injections. If you are pregnant, nursing or taking prescription drugs, ask a healthcare professional before use.

Vitamin B12 in the blood usually rises within a few weeks. Methylmalonic Acid and Homocysteine take about 4–8 weeks to settle, so retest after two months. Energy improves only if low B12 was part of the cause. Whether methylcobalamin works better than cyanocobalamin is not settled: both raise levels, and the practical differences are format and price. A chewable suits people who dislike swallowing tablets.