Hi, I'm a newbie here, but not for curly hair. I have had long hair for over 30 years. Gave up curlers and wrapping, & let my hair go au naturel. I would like a change to straighten my hair, but with no formaldehyde, no Brazilian where I can't wash it for days, & no lye. I've heard about cysteine, but cannot find it anywhere, nor can I find any stylist who works with it. My zip is 11710. Can anyone help. I am a 3a. Arlene