Antioxidant Supplements of No Benefit in Preventing Alzheimers Disease
Most studies on dietary supplements are mixed. While foods rich in certain nutrients appear to be protective, taking those same vitamins in a pill often don’t have the same positive effect. The same may be true about taking antioxidant supplements in hopes of preventing Alzheimer’s disease (AD).
Antioxidant nutrients combat the oxidative damage done to our bodies every day. Metabolic reactions produce free radicals that interact with other molecules and cause damage to proteins, membranes, and genes. This influences the aging process and is linked to diseases including cancer and Alzheimer’s. Previous studies indicate that oxidative damage is widespread among people with AD.
Although increasing intake of antioxidants can boost the body’s ability to defend itself against oxidative damage, a recent study by researchers with the Department of Neuroscience at the University of California San Diego finds that supplementing certain individual antioxidant nutrients to the diet does not appear to affect certain biomarkers linked to Alzheimer’s disease.
Dr. Douglas R. Galasko and colleagues studied oxidative stress, cognition and function in 78 patients enrolled in the Alzheimer’s Disease Cooperative Study (ADCS) Antioxidant Biomarker Study. The patients were randomized into one of three groups. The first took 800 IU per day of vitamin E (alpha-tocopherol), plus 500 mg of vitamin C and 900 mg of alpha-lipoic acid (ALA).