Whilst the long term use of Tribulus has yet to be studied, it is strongly recommended that the use of this herb is cycled. ... Common sense suggests that you use Tribulus during a training phase and cycle off during a recovery period.
How long can you take Tribulus?
When taken by mouth: Tribulus is possibly safe for most people when taken at doses of 750-1500 mg daily for up to 90 days.
When should I take my Tribulus?
Best Time to Take Tribulus
Tribulus is best absorbed on an empty stomach, and it is commonly taken in a single daily dose half an hour before a meal. Ideally it should be taken around the same time daily. Most important with Tribulus is you don't miss a day.