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Vitamin B12 supplements, what are they for? effectiveness, contraindications in cycling, vitamin B12, vitamin B12 deficiency, vitamin B12 supplementation, vitamin B12 dangers, vitamin B12 side effects

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Vitamin B12, also known as cobalamin, is an essential vitamin for several crucial functions of the human body. Vitamin B12 supplements are often used to ensure adequate intake of this vitamin, especially for those who may have difficulty absorbing it through diet. Here is what vitamin B12 is for, its effectiveness and some contraindications:

What is vitamin B12 used for:

Development and functioning of the nervous system: Vitamin B12 is essential for the formation and health of nerve cells. It also helps in the production of myelin, a substance that surrounds and protects nerve fibers.

Red blood cell production: Vitamin B12 is involved in DNA synthesis and the formation of red blood cells in the bone marrow. A B12 deficiency can lead to a condition known as pernicious anemia.

Homocysteine Metabolism: Vitamin B12 helps convert homocysteine, an amino acid, into methionine. High levels of homocysteine in the blood have been associated with an increased risk of cardiovascular disease.

Immune system: Vitamin B12 plays a role in the function of the immune system and can help maintain the body's overall health.

Effectiveness of vitamin B12 supplements:

Vitamin B12 supplements are generally effective in correcting a deficiency of this vitamin, especially for those following vegetarian or vegan diets, as B12 is commonly found in animal foods.


Allergic reactions: Some people may be allergic to ingredients found in vitamin B12 supplements. It is important to read the label carefully and consult a doctor if you have any doubts.

Drug Interactions: Vitamin B12 supplements may interact with some medications, such as those that affect the absorption of B12 or its use in the body. Consult a doctor if you are taking medications regularly.

Kidney problems: In some cases, taking high doses of vitamin B12 could be associated with kidney problems. People with kidney problems should discuss with their doctor before taking supplements.

Hypervitaminosis: Although rare, excess vitamin B12 can lead to hypervitaminosis, which could cause symptoms such as nausea, vomiting, or diarrhea.

Before starting any supplementation, it is always advisable to consult a health professional to ensure it is appropriate for your needs and health condition.

We remind you that the information contained herein is for informational purposes only, always contact your doctor before taking the product.