I take anywhere from 250mg Glutathione 3X a day to 500mg. Glutathione 3X a day when I take it orally - I break open the pills and spill them into water. i have heard that this is the best way for the body to assimulate supplements. Great brands I have used: Montiff, Solgar, Theranaturals, Pure Encapsulations. It's cheaper if you start out buying pills - then graduate to powder when you want to be able to control the amounts. I originally started taking Glutathione in a nebulizer for r