Effects of Korean black raspberry supplementation on oxidative stress and plasma antioxidant capacity in healthy male smokers

•Korean black raspberry (BR) supplementation was investigated for antioxidant effect in healthy male smoker.•Four weeks of BR supplementation reduced lipid peroxidation.•BR provided high amounts of exogenous antioxidants including anthocyanin.•BR supplementation enhanced endogenous antioxidant enzyme activities, glutathione peroxidase and catalase.•BR supplementation could reduce smoking-induced oxidative stress by enhancing endogenous antioxidant activities in plasma.