The colorless St. John's wort oil from photos #25-28, with the herb crushed and the lot set out into the sun. It turned red immediately. Tapanila, Helsinki, Finland. Processed. 2010-08-16.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.