That's the reports. Some people report great 'gains' and increased libido, all anecdotal. All supplements will have some effect on some people, positive or negative, noticeable or not, quantifiable or not, so this really doesn't mean jack in the end. Everyone is looking for a magic pill that will give steroid like gains or better with no side effects and preferably no PCT necessary. It's not going to happen any time soon, DAA sure as hell isn't even close. When it comes to 'supplements' for anything beyond general health, steroids and peptides are where it's at. Everything else that's known to be effective, like creatine for example, has effects so subtle you'll not likely notice them due to vagueries of diet and training variations. Diet and training are what most everyone needs to concentrate on, in that order.