It was "life-changing" for Kourtney Kardashian. Mad Men actress January Jones touted its benefits too. Tia and Tamera Mowry of the reality show Sister Sister tried it, as did Alicia Silverstone, Big Bang Theory star Mayim Bialik, and various other celebrity moms who raved about feeling more energized, reducing their risk of depression, improving their breast milk production and a host of other supposed benefits.