How effective is shark cartilage for psoriaris treatment?

No proof. Although shark fin (cartilage) has been used medicinally in china with reports that it lowers cholesterol, combats cancer & heart disease & is beneficial for skin health; there is no scientic proof of these benefits at this time. There is a health risk in ingesting shark fins. It is a predator fish with of high levels of bmaa (neurotoxin), arsenic & methylmercury.