@Susan Daffron the Bac water doesnt matter much. Its simply a dilution so if you add more bac water, youre taking a bigger dose each injection. Youre still getting the same amount of the active peptide. This is a stupid simile, but its like if you put 1 cup of cereal in a bowl and 1 cup of milk and eat it compared to 1 cup of cereal and 2 cups of milk. Youre still only eating 1 cup of cereal, youre just getting more filler from the milk...does that make sense? Lol I just do 2ml of bac water in everything out of habit, except ghkcu. I always do 3ml of bac for that because it burns way less that way.