Answer:
d. vitamin b12
Explanation:
According to information based on systematic reviews and evidence summaries, the administration of folic acid and vitamins B6 and / or B12 in patients with elevated homocysteine levels in the blood is not useful to reduce the incidence of cardiovascular events in adults people.
Vitamin supplements to prevent cardiovascular disease found a benefit of its indication and it was concluded that the current evidence is sufficient to be able to establish a recommendation regarding vitamin supplements (based on vitamin B6 and B12, including folic acid) to cardiovascular prevention, or cancer, in adults over 51 years old
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