31. The study of beauty sleep was limited to healthy men, and it is not clear whether the findings apply to women. 32. The study involved middle-aged white men, and Sattar said more research is needed on how the findings apply to others. |
31. The study of beauty sleep was limited to healthy men, and it is not clear whether the findings apply to women. 32. The study involved middle-aged white men, and Sattar said more research is needed on how the findings apply to others. |