Testosterone booster i need guidelines urgently please

Patient: I recently been taking tribulus terrestris which has 95% saponins as an ingredient, the label suggest that it is safe to use i have asked the seller how long should this product be taken for and the answer i got was consistent but i have taken a different type of testosterone boosters before and it suggest not to be taken no more than 6weeks continuous can u help me and provide me the correct guidelines please