Trib doesn't raise test. AI's will by lowering oestrogen production, which will make the boys work harder, and you'll have higher test. levels. Trib alone won't raise test, and I don't beleive it is usefull, even though I think it might have helped me a little bit push harder, but again, it's just me.
Instead, go for some powerfull if you want an herbal product, combine with an AI if you want. You'll see better results for sure.