How effective is Hairfinity? Is it good as they claim? Many celebrities use it too. Is it harmful on the long run of continuous usage? My hair's bad: (

Hairfinity. Healthtap Doctors are asked not to endorse specific brands or product lines.
Hair product. Who is "they"? How do you know "celebrities" use it and if they do, how does that impact your needs or goals? This is a medical forum, we dont answer questions about hair products.