I hope I didn't post already in this thread coz I keep answering no to this question. Actually I'm 4b natural so no curls - however nothing about my hair has been loosened. I wouldn't mind if it had happened coz I don't know of any 4b who would be mad about a little less shrinkage - but it just has not. I used henna monthly from 2k5 till this year - 5 years. Stopping coz I'm tired of henna red and regular hair dye won't take over henna.