Turmeric contains curcumin, which numerous studies have shown is a powerful antioxidant that can help prevent and treat disease.⁵⁹ Results of both in vitro and in vivo animal studies on the herbal mixture student rasayana suggest that it can protect the body against free radicals by inhibiting lipid peroxidation.⁶⁰ Reviews of Ayurvedic rasayana plants have identified mechanisms of antioxidant action, a well-known quality for the prevention and therapeutic treatment of many diseases such as rheumatoid arthritis, neurodegenerative diseases, and gastrointestinal ulcers.⁴⁷