Alternating Regenpure DR with Revita / Hair loss shampoos

[Stevemacfadon]

I have been using Regenpure DR every other day for 2 months and was thinking of alternating this with Revita. I dont want to use the regenpure every day because of the ket. I was wondering if this would be ok or if anyone knows of another shampoo to use for the off days preferably free of parabens?