Centrum Multivitamin, Vitamin C, Beta Carotene, Souvenaid, Zinc, or Calcium Supplements for Preventing Alzheimer’s?

NutritionFacts.org Video Podcast - A podcast by Michael Greger, M.D. FACLM

Which might actually make cognition worse: Centrum multivitamin, vitamin C, beta carotene, Souvenaid, zinc, or calcium supplements?