Tom - About.com User
The reason it may help prevent Alzheimer's is due to the ability of curcumin to reduce amyloid accumulation. It is also an antioxidant, can suppress oxidative damage, and it may also help to prevent colorectal cancer.
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Sources: Yang F, Lim GP, Begum AN, Ubeda OJ, Simmons MR, Ambegaokar SS, Chen PP, Kayed R, Glabe CG, Frautschy SA, Cole GM. "Curcumin inhibits formation of amyloid beta oligomers and fibrils, binds plaques, and reduces amyloid in vivo." J Biol Chem. 2005 Feb 18;280(7):5892-901. Garcea G, Berry DP, Jones DJ, Singh R, Dennison AR, Farmer PB, Sharma RA, Steward WP, Gescher AJ. "Consumption of the putative chemopreventive agent curcumin by cancer patients: assessment of curcumin levels in the colorectum and their pharmacodynamic consequences." Cancer Epidemiol Biomarkers Prev. 2005 Jan;14(1):120-5.


