That test booster sold as tribulus may just contain caffeine. Formulated supplements are firmly in the hand of mafias. And a mixture of chemicals is sold as 100 percent natural. Get real, don't believe all the bullshit published by supplement peddlers.
For what I can get cheaply from ordinary food, I don't spend money on industrial substitutes. But if it is beneficial and not available as standard food, it makes sense to buy it as supplement.
Yeah, if you can get your hands on some genuine tongkat ali. You will probably have to dig for the roots yourself. What they sell on the net is all fake.