I use l lysine to help clear up canker sores. is it okay to contue using while i'm pregnant?

Jury is out: There are no good studies available to say if lysine supplements are safe during pregnancy. Best to stay away from this until the effects if any are clearly understood.

Call your doctor: There is insufficient reliable information available on the safety of using lysine during pregnancy or breastfeeding.

Yes: Lysine is considered a category c medication, meaning some animal studies may suggest problems in fetal growth but no human studies to date have done so.This classification applies to those using it as a dietary supplement. As with any supplement your OB should be made aware of ant preparation you take.

Why?: Lysine was thought to help treat herpes simplex because in tissue culture it creates a lower yield of virus. Not at all clear that it does anything in people. Canker sores are not of herpetic or other viral origin and I am not of any knowledge that lysine works for these either.