B12 Liquid 1000 mcg by Pure Encapsulations

A liquid B12 suits people whose Vitamin B12 has tested low or low-normal, or whose Methylmalonic Acid or Homocysteine runs high; both rise when cells are short of B12. Those who most often run low are vegans and vegetarians, older adults, long-term users of metformin or acid-suppressing medicines, and people who have had stomach or bowel surgery. It is also practical if you dislike swallowing pills. If your level is solid and you eat animal foods, extra B12 adds little.

Methylcobalamin is one of the two forms of B12 the body uses directly, so it needs no conversion. B12 is required to make red blood cells, to maintain the myelin sheath that insulates nerves, and, together with folate, to recycle homocysteine. Absorption from food depends on stomach acid and intrinsic factor, a protein made in the stomach. At high oral doses a small share is also absorbed passively, which is why 1,000 mcg can raise levels even when the usual route works poorly.

Each full dropper (1 ml) provides 1,000 mcg of vitamin B12, and the bottle holds 30 servings. The label directs 1 dropper, 1–3 times daily, with meals, or as directed by your health care practitioner. Start with one dropper a day unless your clinician has set a different amount, and shake the bottle well before use. Some people hold the liquid in the mouth briefly before swallowing; swallowing it directly works as well.

B12 has no established upper limit: the body absorbs only a little of a large dose and excretes the excess. Metformin, proton pump inhibitors and H2 blockers lower B12 absorption over time, which is a reason to test, not to avoid the supplement. If your B12 is low without an obvious dietary cause, see your clinician first: absorption problems such as pernicious anemia need a diagnosis, and some people need injections. If you are pregnant, nursing or have a health condition, check with your clinician before starting.

Vitamin B12 in the blood rises within a few weeks. Methylmalonic Acid and Homocysteine usually take 4–8 weeks to settle, so retest after about two months. Fatigue linked to low B12 tends to lift first; tingling or numbness from a long-standing shortfall can take months. Cyanocobalamin is the cheaper, more stable alternative and raises levels reliably for most people; methylcobalamin is the form the body can use without converting it.