Well, there are quite a few hair products that have animal placenta extract in them, as they stimulate hair growth, strength, etc. You can get it in ampules, and then rub into your scalp, or you can get them in shampoos and hair masks and stuff (def. easier to use) - and they also have lost of essential oils, plant extracts and things. If youre in the UK, have a look here
http://www.garden.co.uk/acatalog/GENERAL_HAIR_CARE.html
The Phyto Products are generally very good, and if youre not too sure about the placenta, Im sure youd be able to find something else in their line.
Hope this helps :)