I have read lots of threads about reconstituting HCG with Bac water but why is it necessary. for example if you have 5000iu hcg and you add 1ml bac water, you will have 5000iu/ml. Therefor if I wanted a 500iu dose I would just use 0.1cc on the insulin scale. Is this realistic? Obviously I know if you have 5000iu hcg and 10 ml bac water diluted you will have 500iu/ml. But why is it necessary to use large volumes of water into you when you could inject 0.1cc using the above method with just 1ml of water. If this is correct why do people use lots of bac water when you could get the same dose just measuring on the slin pin.