Ascorbic acid powder

I was given a "vitamin gift" (very common to give "health goods" as gifts in Korea) and behold my newest vitamin, powdered vitamin C (ascorbic acid).  It's good for pretty much everything =P  Our body needs it.

But too much of this at once will give u diarrhea *.* I take one stick and divide the portions in two or three a day, with water.  It's very sour to the point of being bitter.  I'll try anything good for the body, especially for the skin :) 

What are you doing to better your health?