That's too bad it doesn't work for some. I have used it for 5 years and still love it. I tried the actual Matrix Biolage brand and much prefer the GVP to it. I love that it has so many uses. For me, I've used it as a co-wash, rinse out, leave-in and deep treatment. What more could you ask for from an inexpensive conditioner?
3a/b (normal-porosity/elasticity/density)

Cleanse: CJ Curl Fix, poo bars, Sevi Pumpkin, Deva Decadence NP, SM
Condition/LI: MD RCLI, KCKT, GVPCB, DB pumpkin, Sevi Pumpkin, EMBC, Deva Decadence One C, SM
Style: CHS CK, CJPP, CR CM, KCCC, UFDCM, LALSG, B'Leave-in, Deva styling/super cream, BRHG, MopTop (custard/gel), OM HUDS, OM SS, Volumax mousse/gel
DT: SM superfruit, JC DT, CJ Rehab, Sevi Pumpkin

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