Meanwhile, in the private sector, Japan has also become the first nation to approve commercialization of a first - line drug for
psoriasis vulgaris and psoriatic arthritis from the Swiss pharmaceutical company Novartis.
(Cod liver oil offers more vitamin A and D.) Vitamin D encourages new skin cell growth and proliferation, especially keratin compounds, and can help correct skin diseases like vitiligo, scleroderma,
psoriasis, actinic keratosis, and lupus
vulgaris.