Hello, although the formula can be mixed together. But the selection of some ingredients that can not stick to the hair (or common ingredients that are not positively charged) will have low benefits for hair. in the rinse formula (Formulations that are washed off immediately upon use) These ingredients is a mixture that is not positively charged. Make it wash away immediately after washing your hair. The benefits to the skin are therefore limited. If used in a non-rinse formulation (such as hair spray or any treatment that is left on the hair for at least several minutes) is better 2.
Pure Keratin 2% 3.
Creatine 100 1% 4.
N-Acetyl Cysteine 2% 5.
L-Cysteine 2%, but the formula can be mixed, no problem, just this advice. in order to make the formula for maximum benefit.