Of note, evidence suggests that long-term and high-dose metformin therapy impairs vitamin B12 status. Vitamin B12 (also referred to as cobalamin) is a water-soluble vitamin that is mainly obtained from animal-sourced foods. At the cellular level, vitamin B12 acts as a cofactor for enzymes that play a critical role in DNA synthesis and
Vitamin B12 is found in many foods. For those who may not get enough, a healthcare provider can identify and appropriately treat deficiencies. Vitamin B12 is involved in the synthesis of phospholipids, neurotransmitters, DNA, and the metabolism of fatty acids and amino acids. It is found in meat, fish, dairy products, and fortified cereals.
Vitamin B12 plays many crucial roles in the body. It is involved in neurologic function, red blood cell production, DNA synthesis, and a number of important chemical reactions. Vitamin B12 deficiency, while not common, can cause megaloblastic anemia (a disorder of the red blood cells that can cause symptoms such as fatigue, pale skin, and lightheadedness) and neurological and cognitive disorders.

Vitamin B 12 is available only in animal foods (meat and dairy products) or yeast extracts (such as brewer's yeast). Vitamin B 12 deficiency is defined by low levels of stored B 12 in the body that can result in anemia, a lower-than-normal number of red blood cells. Vitamin B 12 deficiency can develop for the following reasons:

Interest in using very high doses of vitamin C as a cancer treatment began as long ago as the 1970s when it was discovered that some properties of the vitamin may make it toxic to cancer cells. Initial studies in humans had promising results, but these studies were later found to be flawed. Subsequent well-designed, randomized, controlled

This drug can interact and cause very harmful effects if taken with B complex vitamins because vitamin C can be contained in vitamin B complex. How the interaction occurs: Vitamin B supplements can contain vitamin C. may contain ascorbic acid, or vitamin C, which may decrease the effectiveness of bortezomib in treating cancer.
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does vitamin c interfere with b12