Youāve hit on key points that are overlooked by the research. It absolutely has to be cycled and if it isnāt an obvious response then you have enough of it and/or your synthesis pathways are robust. I find it interesting, and no doubt @chris_ottawa will find it anecdotal, that oysters are a natural source for it.
Oysters are supposed to have aphrodisiac effects in the short term, never heard anything about them increasing test levels. Maybe DAA has some sort of aphrodisiac effects, but if research is inconclusive about it raising test levels and maybe even lowering them then itās not effective for that at all.