fi1980 - it is amazing what you find the 160B in, and because it is natural it is in a lot of products that are labelled "no additives" etc but like you I would never have thought ever that this could be a problem. DD used to always have huge bruises on her forehead as well from banging it all the time. I thought it was a frustration thing aswell to begin with but after chatting to another lady whos child was doing similiar to mine then researching it online, I eliminated it and my little angel returned. I have given it back to her on occasions only for her to start head butting again and turn into a monster, and it takes at least 4 days to leave her system so its just not worth it.

Please let me know how you go, I would love to know.