Below are a list of reputable sites that we have found on butterbur.

Natural products site where you can buy linpharma butterbur petasin.

Official site of the Migraine action association

Linpharma provide the highest grade and quality of butterbur on the uk market that we know of (accurate June 2006). Free of Pyrrolizidine alkaloids Linpharma Butterbur Petasin is guaranteed to contain at least 15% Petasins.

www.natural-woman.com
Supply Linpharma Butterbur Petasin

www.goodnessdirect.co.uk
reputable suppliers of Butterbur Petasin

http://www.whatreallyworks.co.uk
Everything that you have wanted to know about everything concerning complementary medicine.

www.thinknatural.com
Another reputable webite selling Butterbur Petasin