【完成英文】 The president banned the use of the subsidy for human cloning experiments and called for a voluntary moratorium on private research in the area.
A study by researchers at the Mayo Clinic shows that the steroid hormone DHEA, which is marketed and sold as an anti-aging supplement, has no effect on aging. Older men and women who took the steroid hormone for two years showed no measurable improvements in areas including measurements of body fat, physical performance, insulin sensitivity, or quality of life compared with older people given a placebo.