My mahjong buddy in Sham Shui Po say shark cartilage pill from his Chinese medicine shop can remove the crystal inside my knee. He take 3 bottle already, say no need allopurinol anymore because doctor medicine hurt the kidney. His friend uric acid go down after stop medicine and only eat shark cartilage pill every day. Is this true or not? Can I stop my allopurinol and take only shark cartilage pill for my gout?