Natural Factors Regenerlife Creatine - contains high-quality creatine monohydrate, a naturally occurring compound that increases the body’s lean muscle mass when used in conjunction with a resistance training regimen. Creatine monohydrate is quickly taken up by muscle cells where it is used to replenish ATP stores, which decline naturally with age. Third-party-tested, non-GMO formula provides 5g of purified, micronized creatine per serving, delivered in an easy-to-mix, readily absorbed powder that is suitable for vegans.