Spot on. One of the dirtiest secrets of the supp world is that given a subject in normal hormonal ranges, increase in testosterone levels while still in normal ranges doesn't do much outside of a boost in quality of life. Muscle building does not directly increase. DAA is an amazing look at what placebo can do. Plenty of people reported amazing gains when DAA first came out. Then a couple years later we had better data to look at and found out DAA has a nasty habit of decreasing male sex hormone. RIP.The only research I’ve seen showing benefits in this regard are in subjects with low testosterone levels. Conversely, all the research I’ve seen on healthy young subjects with normal testosterone levels seemed to show no benefit, or even a decrease in testosterone with higher dosing. The placebo effect can be strong in some people, but it may be useful for people with low-T.