M & F, preshampoo w/ Biotin shampoo (to which I've added TTO) followed up by shampooing w/ Dr. Lee's Regrowth.
The other 5 days, preshampoo w/ Biotin shampoo followed by a Thicker and Fuller Hair shampoo (to which I've added caffeine).
When my hair's shorter - I skip the pre-shampoo. As it gets longer, I need to shampoo, rinse, and then shampoo again.