Five checks

Tribulus and Horny Goat Weed in Horse Peak Gelatin: 5 Checks on Two Thin Rows

By Horse Peak Gelatin Team · Medically reviewed by Dr. Alison Egeland, ND, Naturopathic physician · Review date October 16, 2026 · Last updated October 29, 2026 · 7 min read

Check 1: What does the label print for tribulus and horny goat weed?

Both rows read 100 micrograms of a 10:1 extract. The tribulus row carries a mistake. It prints the Latin name of fenugreek, Trigonella foenum-graecum L., where Tribulus terrestris L. belongs. It is a typesetting error, not a claim that one herb was swapped for another.

The horny goat weed row reads Epimedium Brevicomum Maxim, leaf, and the word Brevicomum is misspelt. The panel has four printing errors in total, and all four are listed on our supplement facts page. A misprint does not change the amount printed. It is a reason to ask for the finished-product specification.

From the supplement facts page of this website.

Check 2: What did the tribulus trials use?

One trial used 1,500 mg a day of a 35 to 45:1 extract standardised to at least 112.5 mg of furostanol saponins. An 800 mg arm in another trial did no better than placebo. Our source list also holds a 2025 review of tribulus trials, a 2026 meta-analysis and a systematic review of the aphrodisiac claim. We name them and do not quote their results, because our sources do not state them.

The gap to this label is large. The trial extract was a 35 to 45:1 extract, far more concentrated than a 10:1 one, and it came with a named marker. This gummy has 100 micrograms of a 10:1 extract and no stated marker. Strength of extract and standardisation matter more than weight alone.

A case of kidney injury after a tribulus product is also on the source list. Cases of harm like that involve gram-level products, not 100 micrograms.

Check 3: What exists for horny goat weed?

Horny goat weed is the leaf of Epimedium, an herb from traditional Chinese practice. Interest in it rests on icariin, a plant compound. In a test tube, icariin acts as a weak inhibitor of the PDE5 enzyme. The published work beyond that is in cells and in rats. A 2022 review of what icariin has and has not shown puts it plainly: cells, rodents and a good deal of enthusiasm.

There is no human oral dosing trial to hold this row against. That makes it the only one of the six where no comparison can be drawn at all. A paper on Epimedium also shows how much the material varies. Two labels with the same weight need not sell the same thing.

• A test-tube result is not a result in a person.
• A rat result is not a result in a person.
• Without a human dosing trial, a label amount cannot be judged either way.

Check 4: Is 100 micrograms of either one a safety concern?

Nothing is documented at these amounts. The cases of harm tied to these herbs involve gram-level products. That is the other side of being too small to do much.

Two cautions remain. The first is allergy and individual sensitivity, which respond to the plant and not to the dose. If any herb has ever troubled you, skip the gummy and ask a doctor. The second is the nitrate point. The warning on this website about sildenafil-type drugs and prescribed nitrates is about hidden drugs in the aisle, not about this row. Nothing is published about horny goat weed and nitrates. If you take a nitrate, ask your doctor about every supplement.

The label's own caution still applies. Pregnant or nursing mothers, children under 18 and anyone with a known medical condition should ask a physician first.

Check 5: What should you ask, and what should you expect?

Expect little from these two rows and be glad that the panel lets you see why. The two real doses on this label are vitamin D3 and boron. The four botanicals are named on the front and printed at 100 micrograms each.

1. Ask the order desk for the finished-product specification, in writing.
2. Ask whether any of the four extracts is standardised to a named marker. None is printed.
3. Ask whether a certificate of analysis exists for your lot. The desk holds a certificate reference, not a laboratory letter.
4. Run a fair 60-day test with notes you keep yourself. Judge at about day fifty.

Our posts on reading the supplement facts label and the ingredients page explain more.

Where do these facts come from?

Label and policy facts come from the Horse Peak Gelatin bottle artwork, the distributor's own paperwork and the pages of this website. Outside sources are named below.

Frequently asked questions

Our view

These are the two thinnest rows on the panel. Tribulus has mixed results at much larger, standardised doses, and horny goat weed has no human oral dosing trial at all. At 100 micrograms each, they are far too small to test and too small to worry about.

Judge the gummy by the two real rows, vitamin D3 and boron, and by a fair 60-day test. If the botanical names were what drew you in, ask the desk for the specification before you decide.

Last updated October 29, 2026