A story to tell. First off, I don't have psoriasis. But my neighbor started showing signs of it about 5 years ago. It was on her legs, developing to about the size of a football. I told her what she needed to try, but she felt the need to discuss with her doctor. After a lot of testing, she found that she was allergic to Balsam of Peru, and that she needed to avoid all the items. Which are considerable, including Chocolate. Well, she was absolutely religious about it, with minimal return on her effort. Went back to her Rheumatologist, who wanted to put her on Humira. Well, she read the patient info and decided she didn't want that. After 17 months of this, she finally decided to try my suggestion, unflavored (because of the Balsam of Peru) Kefir. Well, in a week, the site on her right leg had reduced by 5 centimeters, and in three weeks, it was gone. Still some redness, but going away. Since then, she is very disdainful of the Humira commercials, and always seems to have Kefir in her refrigerator. But has never been inclined to make it for herself. Even though she once got a kit for making Water Kefir. I have encouraged Kombucha, but she's not interested.