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It is a synthetic fragment of human growth hormone (amino acids 176-191), studied in research settings for its proposed role in fat metabolism
Difficulty concentrating or memory problems
In patients with severe vitamin B12 deficiencyespecially those with megaloblastic anemia successful treatment rapidly reactivates the bone marrow
Heart and Vessels
For example, long-term use of oral contraceptives may lower levels of Vitamin B2 (riboflavin) , while some diabetes and epilepsy drugs affect Vitamin B12 (cobalamin) levels
The sixth coordination site, the center of reactivity, is variable, being a cyano group (-CN), a hydroxyl group (-OH), a methyl group (-CH3) or a 5-deoxyadenosyl group (here the C5 atom of the deoxyribose forms the covalent bond with Co), respectively, to yield the four B12 forms mentioned above
