Prohormone & Supplement Ingredients:

Tribulus Terrestris

Tribulus terrestris is one of the most recent herbal supplements claimed to have ergogenic (muscle building) effect, achieved by 'naturally' boosting testosterone levels. Tribulus terrestris (aka puncture weed/vine or caltrops) grows mainly in sandy soil and has a fruit encased in a sharp, spiny burr. The extract from the fruit has been used in herbal medicine as a diuretic, and for colic pains, hypertension and hypercholesterolemia (high cholesterol). But the reason we're interested in it is becuase it's also been reputed to increase testosterone levels in animals.

The active agent in Tribulus is thought to be protodioscin, a precursor to dehydroepiandrosterone (DHEA), which is a precursor to testosterone. Tribulus is also believed to indirectly affect testosterone levels by stimulating the release of leutinizing hormone (LH), which stimulates the natural production of testosterone.

Does Tribulus Terrestris Work? I was only able to find two published studies on the effects of Tribulus terrestris supplementation in humans.

In the first study looked at the effects of Tribulus terrestris supplementation during training on body composition and performance. Fifteen resistance-trained males ingested either 3.21mg per kilogram of bodyweight of either a placebo or Tribulus terrestris for eight weeks during a standardized resistance-training program. Results showed Tribulus terrestris supplementation had no significant effects on changes in mood states, total body weight, percent body fat, or gains in
bench press or leg press. Although LH and testosterone levels were not assessed in this study, results indicated that Tribulus terrestris supplementation of approximately 250mg a day during resistance training had no significant effects.

In the first phase of another study 10 subjects then ingested a placebo or a supplement containing 100mg androstenedione, 50mg DHEA, 250mg Tribulus terrestris, 195mg Chrysin, 100mg Indole-3-carbinol, and 180mg Saw palmetto. Blood samples were obtained every hour for six hours, with results showing significantly increased androstenedione levels. However, no significant differences were between the placebo and anabolic precursor trials in LH, follicle stimulating hormone (FSH), estradiol, free testosterone, or total testosterone levels. These findings indicate that although anabolic precursors may
increase androstenedione levels, they have no significant effect on other androgenic or estrogenic hormones.

In the second phase of the same study, 20 untrained male subjects participated in a 3-day per week resistance training program for 8 weeks. The subjects took either a placebo or a supplement containing 300mg androstenedione, 150mg DHEA, 750mg Tribulus terrestris, 625mg Chrysin, 300mg Indole-3-carbinol, and 540mg Saw palmetto every day during weeks 1, 2, 4, 5, 7, and 8. Results revealed that Saw palmetto supplementation during training increased fasting androstenedione, estradiol, and estrone levels while decreasing high-density lipoproteins levels. No significant differences were observed in LH, FSH, total testosterone, free testosterone, or estriol levels. There were also no significant differences observed in body composition, muscle fiber diameter, or gains in 1RM strength. These findings suggest Tribulus terrestris at 750mg per day with other anabolic precursors does not significantly affect body composition or training adaptations.

So despite claims, there's no current data supporting the ergogenic value of Tribulus terrestris for resistance-trained athletes.

Ba-BAM!
Supplements with this ingredient:
DecaFire (Prohormones)
eMonster (Prohormones)
Post Cycle 3X (Post Cycle Support)
Size 350 (Prohormones)
Stage II Evolution PCT Rejuvenation (Post Cycle Support)
Tri-Methyl X.X.XXV Limited Edition (Prohormones)
Tri-Methyl Xtreme 3.15 (Prohormones)

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