Aside from usual side digestive system effects from weight loss pills such as gas and diarrhea, users of Alli should also take note of another side effect – vitamin deficiency.

This is because as Alli reduces absorption of fat in the gastrointestinal system, it also decreases the absorption of vitamins.

So according to Dr. David Westbrock, New Profile Weight Management Center’s director and an endocrinologist, it’s important to also take vitamin supplements while using this diet pill.

If you’d like to learn more about Alli, you might want to read “Are You Losing It?” Alli’s diet book.

Tags: Alli, vitamins, diet pill, side effects