Actually if you read the first link you'll read just how useless it is.
Save your money. The absolute ONLY way to get into legit male ranges is by actually taking T...or having an underlying medical condition. These T boosters are aimed at cis guys who actually do produce much more T than female bodies. A high female range of T is around 2 nmol/L. A low male range is around 9nmol/L but for that you're talking much older men, that range in a young man would likely result in symptoms of low T and would be addressed medically! My levels right now are around 17nmol/L and my endo actually upped my dose a little! During puberty boys tend to have far high ranges.
So the absolute best results with T boosters are really only at around 50% (yet there's no proper studies). Now if your levels are at 10+ - that's a fairly decent increase (though still unlikely to happen). But even if your T ranges are in a high female range (around 2)...yeah, a 50% increase is nothing! That's not even getting anywhere near elderly men ranges!!
Yeah, save your money!