But cell and animal test may not project proper results of the human trial. About this point, those who are in biochemistry and biomedicine areas know better than me.
All the references:
No evidence of benefits from antioxidant supplements
Bjelakovic et al. Cochrane Database of Systematic Reviews 2008, Issue 2.
Trans fats linked to breast cancer risk
Chajes, et al. Am. J. Epidemiol., Advance Access published on April 4, 2008; doi: doi:10.1093/aje/kwn069
Reishi mushrooms and green tea may slow cancer
Press release: http://www.sciencedaily.com/releases/2008/04/080408175308.htm
Dark chocolate may not have health benefits
American Journal of Clinical Nutrition, 87 (4), 2008, pp 872-880.