I began finding greys at age 23. I'm very chemically sensitive and so have always avoided color treatments but last summer found some at a natural foods store that were completely herbal. I gave it a go and liked the results. Yea! I wasn't going to be an old looking mom when my son began Kindergarten! But between doing the math ($15/month=$180/year) and carving out time to keep it up, I decided it wasn't worth it. BTW, I'm 37 now and will stay au naturel.