Homocysteine, vitamin B12 and folic acid levels in psoriasis patients

Background Hyperhomocysteinaemia is a risk factor for atherosclerotic cardiovascular disease, stroke, peripheral arterial occlusive disease and venous thrombosis. An association between psoriasis and cardiovascular diseases has been reported. Aim The aim of our study was to examine serum homocysteine, folic acid and vitamin B12 levels in psoriasis patients. Material and methods We performed a cross‐sectional study in 70 consecutive outpatients with chronic plaque psoriasis and 70 age‐ and gender‐matched controls. Serum levels of homocysteine, vitamin B12 and folic acid levels were measured in both groups. Results Serum homocysteine, folic acid and vitamin B12 levels did not differ between patient and control groups. In psoriasis patients, homocysteine levels correlated directly with psoriasis severity as measured by psoriasis area and severity index. Serum homocysteine level inversely correlated with serum folic acid levels in the patient group. Discussion Homocysteine levels correlated with psoriasis area and severity index in the patient group, which shows the disease severity. The increase in cardiovascular mortality with the severity of psoriasis might be also due to the effects of homocysteine. Conflicts of interest None declared