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Homocysteine is an amino acid. Amino acids are the building blocks of proteins. When proteins break down, elevated levels of amino acids like homocysteine may be found in the bloodstream. Having elevated levels of homocysteine in the blood (hyperhomocysteinemia) is associated with atherosclerosis and blood clots. It is not possible to get homocysteine from the diet. It must be made from methionine, another amino acid that is found in meat, fish, and dairy products.
A: A high level of folic acid or folate in the blood indicates a person eats a diet that is high in folic acid, takes vitamins, takes folic acid pills or has a vitamin B12 deficiency, states WebMD. Having too much folic acid in the blood is not a dangerous condition and does not cause other health issues.