turmeric and curcumin for arthritis pain and analgesic

curcuma longa turmeric natural chemical arthritis curcumin curcuminoids antioxidant properties ginger supplements osteoarthritis rheumatoid inflammatory arthritic diferuloylmethane demethoxycurcumin effects absorption pepper radicals neuroprotective knee pain side medication ayurvedic medicine health benefits joint symptoms spice extract bioavailability white conceptual concept designs disease infection therapy plant herb