Before you chase exotic herbs and the latest “test-booster,” it's worth asking a boring question: are the basics covered? For a lot of European men, they aren't.
Zinc
Zinc is involved in hundreds of processes in the body. The two that matter most here are backed by authorised EU health claims: zinc contributes to the maintenance of normal testosterone levels in the blood, and to the protection of cells from oxidative stress. T1x uses 15 mg of bioavailable zinc citrate (150% NRV): a real dose, in a form your body can actually absorb, not the cheap oxide that passes straight through.
Vitamin D3
Vitamin D is the “sunshine” nutrient, and if you live anywhere with a real winter you probably run low for months at a time. It contributes to the maintenance of normal muscle function. T1x includes 2000 IU (50 µg) of D3: a meaningful amount, not a token sprinkle.
Foundation first
None of this is exotic. That's the point. A booster sitting on top of a deficient foundation is a skyscraper on quicksand. Cover the basics at proper doses, disclosed on the label, and the rest of the protocol has something to build on.