Durak, I., I. Koksal, M. Kacmaz, S. Buyukkocak, B.M. Cimen, H.S. Ozturk, 1999. Hazelnut supplementation enhances plasma antioxidant potential and lowers plasma cholesterol levels. [Letter to the Editor]. Clin Chim Acta. 284(1):113-5.
In this study, 30 healthy medical students added 1 gram of hazelnuts per kilogram of body weight per day to their normal daily diet for 30 days. Total cholesterol was lowered by 6%, LDL by 19%, while HDL increased 7% and triglycerides 25% compared to baseline values. Plasma antioxidant potential (AOP) also increased by 20