Cycloastragenol is extracted and purified from the roots of Astragalus membranaceus, being claimed to stimulate immune system, to improve cardiovascular health, to repair DNA, and to activate telomerase that is crucial for anti-aging.

Bruno Bernardes de Jesus, Kerstin Schneeberger, Elsa Vera ．The telomerase activator TA-65 elongates short telomeres and increases health span of adult/old mice without increasing cancer incidence ：Aging Cell ，2011 ．