Disclosed is a composition for reducing the levels or level of glucose, malondialdehyde-modified LDL, homocysteine, and/or C-reactive protein in the blood. Specifically disclosed is a composition for reducing the level of at least one substance selected from the group consisting of glucose, malondialdehyde-modified LDL, homocysteine, and C-reactive protein in the blood, which comprises the following components (a) and (b): (a) at least one component selected from the group consisting of vitamin B 12 , vitamin B 6 , and folic acid； and (b) at least one component selected from the group consisting of zinc, selenium, and an antioxidant vitamin.
