Should you avoid megavitamins?

Susan Hendricks tells us about a new book that warns that megavitamins are bad for our health.

Source: http://rss.cnn.com/~r/rss/cnn_health/~3/8jYjo02v1BA/hm-avoid-megavitamins-dr-paul-offit.cnn.html

as an example explained here as explained here resource