Ingredient
Tribulus Terrestris in Stallion Power: Line 8 of 9, the Evidence
Tribulus terrestris is the eighth ingredient in the Stallion Power blend. The label gives no amount, but it cannot weigh more than the printed 5 mg of caffeine. A systematic review of 11 studies concluded that tribulus is ineffective for raising testosterone in humans, and no safe or effective dose has been set.
Written by the Stallion Power label deskUpdated
The ingredient01
Tribulus on the Stallion Power label
Tribulus terrestris is the eighth of nine lines. Under the rules for blends, that means one of the smallest weights.
The label reads “Tribulus Terrestris” and gives no separate amount. Only caffeine has its own printed weight, at 5 mg (Stallion Power sales page). The plant is sold for sexual function and body building (MSK, Tribulus terrestris). The label does not say which part of the plant is used.
| Name on the label | Tribulus Terrestris |
|---|---|
| What it is | Tribulus terrestris plant |
| Place on the label | 8 of 9 in the 82 mg proprietary blend |
| Amount per gummy | Not listed; line 8 of 9 in the 82 mg blend: at most 10.2 mg by the plain rule, and at most 5 mg when the printed 5 mg of caffeine is used |
| Amount used in research | No safe or effective dose set |
| Strength of evidence | A review of 11 studies found it ineffective for raising testosterone |
| Marketed or traditional use | Plant sold for libido and muscle |
| Main caution | Stomach upset; rare kidney and liver case reports; possible interactions with diuretics, blood pressure and diabetes medicines. |
No study we found tested the finished gummy. What follows is about tribulus on its own.
The label arithmetic02
How much tribulus can one gummy hold?
US rules list the ingredients of a proprietary blend from most to least by weight (21 CFR 101.36, Supplement Facts). Divide 82 mg by eight and the plain ceiling for place eight is 10.25 mg. The label prints caffeine at 5 mg in place five, and every later line must weigh no more than caffeine. So the tighter ceiling is 5 mg.
Line 7, L-arginine, can hold at most 5 mg of the 82 mg once caffeine's printed 5 mg is used (11.71 mg by the plain rule).
Red: the tighter ceiling. Brass: the extra room the plain rule would allow. Dark: the rest of the 82 mg. The label gives the 82 mg total, the order and caffeine's 5 mg (21 CFR 101.36, Supplement Facts); a line cannot weigh more than the lines listed before it. It is arithmetic on the label, not a lab result.
These are ceilings, not contents. The sums assume the label follows the descending-order rule. They are arithmetic on a printed label, not a lab result, and a real gummy can hold less.
Against the research03
What the review of 11 studies found
A systematic review looked at 11 studies, one of them a patent application. The trials differed too much to combine. The authors concluded that evidence to date suggests tribulus is ineffective for increasing testosterone in humans, and that marketing claims are unsubstantiated (Qureshi 2014, Tribulus review). Its abstract reports no direct sexual-function outcomes.
| Question | Answer from the sources |
|---|---|
| Testosterone in humans | Review of 11 studies: ineffective (Qureshi 2014, Tribulus review) |
| Where a rise appeared | Only when tribulus was part of a combined supplement (MSK, Tribulus terrestris) |
| Erectile dysfunction | Data are mixed (MSK, Tribulus terrestris) |
| Safe or effective dose | None set (MSK, Tribulus terrestris) |
| Stallion Power ceiling | At most 10.25 mg plain, 5 mg tighter (21 CFR 101.36, Supplement Facts) |
In athletes, tribulus alone did not improve androgenic status or physical performance (MSK, Tribulus terrestris). Without a studied dose, there is no amount to set beside the gummy.
Strength of the evidence04
How strong is the evidence?
Weak, and mostly negative on testosterone. Memorial Sloan Kettering calls the erectile dysfunction data mixed and notes that a pilot study in men with partial androgen deficiency showed differences in testosterone and erectile function (MSK, Tribulus terrestris). A pilot is a small first look, not proof.
What the record offers
- A pilot study with some differences in men with partial androgen deficiency.
- Mixed erectile function data.
What the record lacks
- Support for testosterone claims.
- A safe or effective dose.
- Any trial of the finished gummy.
The bottle claims “BOOST PERFORMANCE†” and “SUPPORT CONFIDENCE†”. Neither names tribulus. The claims versus evidence page weighs them, and male sexual health basics explains what testosterone does and does not do.
Stallion Power: from $49 a bottle30 gummies a bottle · 2, 3 or 6 bottles · free shipping on 3 or 6 · 60-day guarantee
See packsSafety05
Cautions with tribulus
Memorial Sloan Kettering lists transient stomach irritation and reflux, kidney toxicity, and case reports of severe high bilirubin with acute kidney failure and of priapism. Raised liver enzymes and creatinine have been reported (MSK, Tribulus terrestris). These are reports, not rates, and the page gives no safe dose.
Memorial Sloan Kettering lists diuretics, blood pressure medicines, diabetes medicines and clopidogrel, with clinical relevance unknown. Men with prostate cancer should consult a physician (MSK, Tribulus terrestris). Keep taking your prescribed medicine and ask first.
- Stop and call your doctor if any adverse reaction occurs.
- Seek emergency care for chest pain, fainting, or an erection lasting over four hours (MedlinePlus, Sildenafil).
- The 5 mg ceiling is small, but the label gives no actual amount.
See the side effects page and supplements and medications.
The plain verdict06
What this means if you are deciding to buy
Tribulus is sold on a testosterone story that the best review does not support. The label allows it a small share. If testosterone is your worry, ask a doctor. Testosterone deficiency is defined as low levels together with symptoms (AUA, Testosterone Deficiency Guideline).
If you try the product, follow the label: one gummy once daily, or as directed by a qualified health care professional. The sales page offers a “60-Day Money-Back Guarantee”; the guarantee page lists its terms. Packs are $49 to $79 a bottle on the pricing page.
Order Stallion PowerWe earn money when you order through our links. That does not change what the research says.
FAQ07
Stallion Power questions people ask
What is tribulus terrestris?
Tribulus terrestris is a plant sold as a supplement for sexual function and body building (MSK, Tribulus terrestris). The label lists it as “Tribulus Terrestris”, line 8 of 9, with no separate amount and no mention of which part of the plant is used.
Does tribulus raise testosterone?
The best review says no. A systematic review of 11 studies concluded that the evidence suggests tribulus is ineffective for increasing testosterone in humans (Qureshi 2014, Tribulus review). Rises appeared only when it was part of a combined supplement, so the credit is unclear (MSK, Tribulus terrestris).
Is tribulus a steroid?
The sources we read do not describe it as a steroid. It is a plant, and the review found it ineffective for increasing testosterone (Qureshi 2014, Tribulus review). The label does not list any steroid, and we found no lab result for the gummy either way.
Which part of the tribulus plant is used in supplements?
The sources we read do not say, and the label does not either. The label reads “Tribulus Terrestris”, not fruit or leaf extract. We did not verify the part used. Ask the seller at [email protected] if it matters to you.
Can tribulus affect blood sugar?
Memorial Sloan Kettering lists diabetes medicines among possible interactions, with the clinical relevance unknown (MSK, Tribulus terrestris). If you use insulin or tablets for diabetes, ask your doctor or pharmacist before you start, and keep taking your medicine.
Do athletes need to worry about tribulus in drug tests?
The sources we read do not address drug testing, so we cannot say. If you compete in a tested sport, check the product against your sport's rules, or ask the governing body, before use. The finished gummy has no lab report that we found.
Who wrote this08
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, FTC, NIDDK, AHA and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by Gostallionpower, a Stallion Power U.S. merchant desk, not by the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
Keep reading
More Stallion Power pages
Stallion Power U.S. merchant desk
Ready to try Stallion Power?
Check your medicines first, then pick a pack. Three or six bottles ship free and cost less per bottle, and every pack carries the 60-day money-back guarantee.
- Order on the sales-page checkout
- 60-day money-back guarantee
- Delivery up to 60 days, per the sales page
