Ingredients
Apex Boost tribulus terrestris: what do we know about the first herb?
Quick answer: Apex Boost tribulus terrestris is the first herb in the blend, so it is the largest share of the 838 mg, but the label does not print how much. NIH reports no effect on strength, lean body mass or sex hormone levels. Memorial Sloan Kettering lists case reports of liver and kidney toxicity.
Where is tribulus terrestris in Apex Boost?
Apex Boost tribulus terrestris sits at the top of the ingredient list. The label prints Tribulus Terrestris Extract (Tribulus terrestris) first, ahead of horny goat weed, longjack, ginseng, ashwagandha and yohimbe. Under FDA labelling rules, ingredients inside a proprietary blend must appear in descending order of weight, so first place means the heaviest of the six.
Tribulus is a vine fruit that men's formulas have used for decades, and it is the herb most often sold as a testosterone booster. That reputation is why people search for it by name, and it is why this page exists. We look at what the label shows, what the research bodies say and what a buyer should ask.
Key facts
- Tribulus Terrestris Extract is first on the label, so it is the largest share of the 838 mg blend.
- Its amount is not published. The average share is about 140 mg, so tribulus is at least about that.
- Commonly studied amounts: 250-1,500 mg a day of a standardised extract. No comparison with Apex Boost is possible.
- NIH: no effect on strength, lean body mass or sex hormone levels.
- Memorial Sloan Kettering: case reports of liver and kidney toxicity; ask a physician first if you take clopidogrel, diuretics, blood pressure drugs or diabetes drugs.
- No trial of the finished Apex Boost blend is cited on this site.
Want to see the full label before you decide? The panels are published, and the checkout shows the price and the 60-day terms.
Disclosure: Apexboost earns a commission on orders placed through this checkout link. It does not change the price you pay.
How much Apex Boost tribulus terrestris is in a serving?
Not published. The label gives one number for the whole active section: a Proprietary Male Support Blend of 838 mg per two-capsule serving. It prints no milligram figure for tribulus, no extract ratio and no standardisation, so we cannot give you one either.
Plain arithmetic does give one boundary. Six herbs share 838 mg, and the average share is about 140 mg. Because tribulus is listed first, its share cannot be smaller than the average, so it is at least about 140 mg, and the label stops there. It could be a little more or a lot more. Published trials usually use 250 to 1,500 mg a day of a standardised extract, so a reader cannot say whether this capsule reaches that range.
| Question | Answer |
|---|---|
| Amount in Apex Boost | Not published |
| Position in the blend | First of six, so the largest share |
| Commonly studied amount | 250-1,500 mg a day of a standardised extract |
| Can the two be compared? | No, because the label prints only the 838 mg total |
What do the research bodies say about Apex Boost tribulus terrestris?
The NIH Office of Dietary Supplements reports that tribulus showed no effect on strength, lean body mass or sex hormone levels. Memorial Sloan Kettering is just as direct. Its herb monograph says a tribulus extract used alone did not improve androgenic status or physical performance among athletes.
Where testosterone rose in the literature, tribulus was one part of a combined supplement, so nobody can say which ingredient did the work. That caveat matters for a six-herb blend. It means a rise seen in a combined product cannot be credited to tribulus alone, and it cannot be credited to Apex Boost either, because no trial of the finished blend is cited.
We print that here because the largest share of the capsule goes to a herb whose headline claim the NIH did not find. The honest reading is not that tribulus is worthless. It is that the evidence for the claim people search for is thin, and the label gives you no way to test an amount.
What cautions come with tribulus?
Memorial Sloan Kettering lists case reports of liver and kidney toxicity, and one report of priapism, which is a prolonged and painful erection. It advises anyone who takes clopidogrel, diuretics, blood pressure drugs or diabetes drugs to ask a physician first.
These are reports, not rates, and they do not say how likely a problem is at the amount in this capsule, which is not published. They are a reason to speak to your clinician if you take any of those medicines or have a liver or kidney condition. They sit on top of the bigger caution in the blend, which is yohimbe. Our post on the safety of Apex Boost covers the rest.
Does a bigger tribulus share make the blend better?
Not on the evidence we cite. A larger share of an ingredient only helps if that ingredient does something at that amount. Here the largest share goes to the herb with the NIH null finding, while the herb with the clearest evidence, ashwagandha, is second smallest, and the one with the strongest cautions, yohimbe, is smallest.
Some readers find that arrangement disappointing. Others read it as sensible, since the riskiest herb is the smallest. Either way, it is a fact about the label, not a verdict on how you will feel. Our post on the six herbs checked one by one puts the herbs side by side.
What should you ask before you buy?
- Can I live without knowing how much tribulus I am taking? If not, choose a disclosed-dose product.
- Do I take clopidogrel, a diuretic, blood pressure medicine or diabetes medicine? If so, ask a physician first.
- Do I have a liver or kidney condition? If so, ask a physician first, whatever the label says.
- Do I expect a change in hormone levels? Nothing we cite supports that, and the product claims only support for libido, stamina and energy.
If the answers are fine, the product comes with a 60-day money-back guarantee on orders placed through this site, which gives you time to judge for yourself. The ingredients page lists the other five herbs.
What are the label, price and guarantee facts?
| Item | Fact |
|---|---|
| Label name | Tribulus Terrestris Extract (Tribulus terrestris) |
| Position in the blend | First of six |
| Blend total per serving | 838 mg |
| Tribulus amount | Not published |
| Commonly studied amount | 250-1,500 mg a day of a standardised extract |
| NIH finding | No effect on strength, lean body mass or sex hormone levels |
| Guarantee | 60 days from delivery on orders placed through this site |
Where do these facts come from?
The label facts come from the Supplement Facts panel photographed on this site. The tribulus findings come from the two public health pages below, which this site opened and read.
- Memorial Sloan Kettering Cancer Center, About Herbs (2026). Tribulus terrestris.
- Office of Dietary Supplements, National Institutes of Health (2026). Dietary Supplements for Exercise and Athletic Performance: Health Professional Fact Sheet.
- U.S. Food and Drug Administration (2026). Questions and Answers on Dietary Supplements.
Frequently asked questions
How much tribulus is in Apex Boost?
Not published. Tribulus is listed first, so it is the largest share of the 838 mg blend, but the label prints no number for it.
Does tribulus raise testosterone?
The NIH Office of Dietary Supplements reports no effect on strength, lean body mass or sex hormone levels. Memorial Sloan Kettering says an extract used alone did not improve androgenic status or physical performance among athletes.
Is tribulus safe?
Memorial Sloan Kettering lists case reports of liver and kidney toxicity and one report of priapism. Ask a physician first if you take clopidogrel, diuretics, blood pressure drugs or diabetes drugs.
Why is tribulus first on the label?
Because FDA rules put the ingredients of a proprietary blend in descending order of weight. First means the heaviest share, not a stated amount.
Is the tribulus a standardised extract?
Not published. The label says Extract but gives no ratio or standardisation percentage.
Can I take Apex Boost if I am on blood pressure medicine?
Ask your clinician first. Yohimbe, also in the blend, is linked by NCCIH to blood pressure problems, and tribulus carries its own note about blood pressure drugs.
Our view
Tribulus is the herb most people recognise on this label, and it gets the biggest share of the blend. The research bodies we cite did not find the effects it is famous for. That does not make the capsule useless, and it does not make it dangerous. It makes the claim people search for hard to support.
Judge the product on the whole label, which you can read on the Supplement Facts page. And if you want the reasoning behind the blend, the home page and our post on what a proprietary blend hides give the context.
If the trade-offs suit you, the 60-day window gives you time to judge the capsule for yourself.
Disclosure: Apexboost earns a commission on orders placed through this checkout link. It does not change the price you pay.
Last updated . Medically reviewed by Dr. Jonathan Clavell, MD, Physician. This page is general information. It is not medical advice. Apex Boost is a dietary supplement. It is not FDA approved, and no supplement is.
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