Not actually a vitamin, but it was reported to have cured Ulcers in the 1950's. (Ulcer Factor)

It is available in raw cabbage - especially the cabbage core. Vitamin U is most concentrated in the juice. Alfalfa sprouts are another good source of Vit U. All cruciferus veggies contain cabagin. Can't be regulated because its in our food. Don't use if you can't tolerate cole slaw or other raw cabbage. (Sorry, Sally, but read below) People with goiters should not use cabbage, and over use of cruciferous vegetables is implicated in goiters.

Dosage: Most people can benefit using up to 1/3 cup of the juice from the core of a green cabbage, staggered throughout the day. (Probably just juice the whole cabbage.)

The outer leaf is a good source of Vitamin E. Use the outer leaves, they are used to wrap burns and for stomach aches. Buy ORGANIC!

Cabbage is also a great source of digestible sulpher, which is also in MSM.

The following link is about Alfalfa, but read about Vit U at the end of the first paragraph.

Cabbage Properties -

Benefits of Cruciferous Vegetables

Psoriasis treatment using Cabbage Leaves -

Cabbage leaves have been successfully used in the form of compresses in the treatment of psoriasis. The thickest and greenest outer leaves are most effective for use as compresses. They should be thoroughly washed in warm water and dried with a towel. The leaves should be flattened, softened and smoothed out by rolling them with a rolling pin after removing the thick veins. (I read this in several locations,...what's with the veins?) They should he warmed and then applied smoothly to the affected part in an overlapping manner. A pad of soft woollen cloth should be put over them. The whole compress should then be secured with an elastic bandage.