Hair Growth Secret! by Tyes Tip-its💟😋💟😜 Hair Growth Secret! Everybody knows that extra virgin olive oil grows your hair in less than a month but did you know sew ins grow your hair too? It's self tested! I kept a sew in in my head for 3 months and oiled in with extra Virgin olive oil and washed it as I would with my real hair and gained 4 inches! See how much you can gain with a sew in and the right treatment!