I have used it for more than 10 years. Twice daily every day for my face. And then I use it for a number of reasons besides that. I know some research can be negative regarding the liver. But it is my understanding that it was brewed as a tea and taken internally in higher concentrations than a normal person would. If it is used externally, on the skin, I have yet to hear a negative story from anyone

What is a PA? I was trying to figure it out from context but couldnt