Homocysteine Humans 9 homocysteine 9 human 9 priority journal 9 article 8 controlled study 7 hyperhomocysteinemia 6 Aged 5 Female 5 Male 5 female 5 male 5 risk factor 5 Folic Acid 4 Hyperhomocysteinemia 4 Aged, 80 and over 3 Middle Aged 3 adult 3 aged 3 folic acid 3 major clinical study 3 vascular disease 3 5,10 methylenetetrahydrofolate reductase (FADH2) 2 Adult 2 Case-Control Studies 2 Diet 2 Vitamin B 12 2 cardiovascular risk 2 clinical article 2