Like most others new to this disease I have been on the internet nonstop trying to educate myself about it. To cut a long story short I watched this:
I watched all of it but the bit which is of interest to psoriasis sufferers is from approx 41 mins. Seeing the vast improvement of the chap on the video led me to experiment. The doctor on the film says he made his ointment with heated vasaline but I used coconut oil. All I did was break open a vitamin D3 capsule (mine is powder not oil) and pour it on to about 2 teaspoonfuls of coconut oil.
The chap in the video says you need to have about 15 micrograms for it to be potent. My capsule is 5000 International Units which converts to about 125 micrograms. My homemade oil has approx 15 micrograms per 2 teaspoon dose and I will let you know if it works!