Vitamin B complex in various forms has been used as an adjunct in the treatment of both psoriasis and seborrheic dermatitis.1About three years ago, again with use of sunlight, crude coal tar (a modified ambulatory Goeckermann routine), with vitamin B12capsules (25 γ), a low-fat, and pork-free diet, improved results were attained, but slowly, with some lack of cooperation on the part of the patient. Vitamin B12 injections of 30 γ per cubic centimeter were added at weekly intervals with no phenomenal improvement over previous methods other than improving the well-being of the patient. It was advocated that 20 7 of vitamin B12a week would suffice, although it is rapidly excreted in 24 hours. In the spring of 1953, vitamin B12of 1,000 γ per cubic centimeter was suggested for neuritis, arthritis, and vascular disorders. This dosage of 1,000 γ per cubic centimeter was