This method worked so well for me before going CG! And I think I'm going back. I wouldn't even have to use a stronger shampoo like some others mentioned, I'd simply coat my hair in oil, and then shampoo as usual with my sulfate containing but very gentle shampoo.
Just starting CG! 5-13

2A, fine, dense, high porosity, highlighted

low-poo: Leonor Greyl bain vitalisant b*
co-wash: CJ smoothing*
RO: ^, SS Caitlin's*
DT: CJ rehab
LI: CJ rehab
stylers: CJ CCCC*
oils: coconut


loves: aloe, oils, esp. coconut
hates: acv, baking soda
on the fence about polyquats