Yes, almost certainly but I'm not sure how it could be proven or disproved - maybe twin studies?

How long have you gone without eating (fasted)?
2/c-3a Coarse hair med. density.
Protein sensitive but can use occasionally
Highly porous. Color over grey.
I love all the Curl Junkie products and use CJ CCCL as my main styler. Still hoping for 2nd day hair....
Every day is a gift