Chief Medical Officer of Northwestern Medicine’s Northwest region of hospitals Dr. Irfan Hafiz joins Bob Sirott to discuss the updated cholesterol guidelines for 2026, the benefits of daily multivitamins for older adults, and the differences between melatonin and magnesium. He also talks about the pros and cons of the keto diet, how an early dinner can impact your weight and sleep, and what tanning does to your skin.

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