Ingredient deep-dive
Horse Fuel Horny Goat Weed: What the 100 mcg Extract Is and What It Adds
Each Horse Fuel gummy lists Horny Goat Weed Extract 10:1 (Epimedium, leaf) at 100 mcg. At a 10:1 ratio, that was drawn from about 1 mg of raw leaf. Horny goat weed has a long traditional history for fatigue and sexual problems, and Memorial Sloan Kettering says more studies are needed. Ask a doctor first if you have a heart condition.
What is horny goat weed in Horse Fuel?
Horny goat weed is the common name for Epimedium, a leafy plant used in traditional herbal formulas. In HorseFuel it is the last of the four plant extracts on the panel, after fenugreek, maca and tribulus.
The label line reads: Horny Goat Weed Extract 10:1 (Epimedium Brevicomum Maxim) (Leaf) 100 mcg. It has a plus mark beside it, which means no Daily Value is set for it. That is normal for a plant extract.
Many men's gummies hide herb amounts inside one blend number. Horse Fuel prints this one on its own line, so you can see exactly how much is there. The full panel is on our label facts page.
How much horny goat weed is in one gummy?
One gummy lists 100 mcg. That is 0.1 mg. The four plant extracts on the panel each come in at 100 mcg, so together they total 0.4 mg.
- Per gummy: 100 mcg of a 10:1 extract.
- Raw plant behind it: about 1 mg of leaf, since 10 parts of plant make 1 part of extract.
- Per bottle: 30 gummies, so 3 mg of extract over 30 days.
- Plant part: leaf, printed on the label.
Micrograms are easy to misread. A microgram is a thousandth of a milligram. Our post Micrograms Are Not Milligrams explains the units in plain steps.
What does the 10:1 extract ratio mean?
A 10:1 extract means ten parts of raw plant were reduced to one part of concentrate. It is a real process, and it does concentrate the plant. It does not change the weight on the label: 100 mcg of a 10:1 extract still started as about 1 mg of leaf.
Horny goat weed products are often sold standardised to icariin, a compound in the leaf. The HorseFuel label prints the ratio but no standardisation figure. So the ratio is the one detail you have to compare it with other products.
What is horny goat weed traditionally used for?
Epimedium has the longest traditional history of anything on this panel. Memorial Sloan Kettering's summary says it is used in traditional herbal formulas for fatigue and sexual problems. Its own words: “More studies are needed to verify such effects.”
Icariin, the best-known compound in the leaf, is the focus of most modern research on the plant. That research is about the compound at real doses, not a claim on the bottle. The Horse Fuel label makes only general claims: energy, stamina and vitality support, in an advanced formula for men.
So the honest way to see this ingredient is as one part of a broad men's formula. The panel's largest active is vitamin D3 at 84 mcg. Our ingredients page sets all seven actives side by side.
Why does the label spell it Epimedium Brevicomum?
The species MSK lists include Epimedium sagittatum, Epimedium grandiflorum and Epimedium brevicornum. The HorseFuel panel prints “Epimedium Brevicomum Maxim”. That reads as brevicornum with one letter changed, and with the species name in capitals.
It is a print detail, and we show it as printed rather than fix it quietly. The plant part, leaf, is clearly given. If the exact species matters to you, ask the order desk before you buy.
Who should ask a doctor before taking it?
MSK lists clear cautions for Epimedium at real doses. Do not take it if you have a heart condition; MSK cites one patient who developed a rapid, irregular heartbeat. It also advises against it with medicines processed by the liver enzyme CYP3A4, and with aromatase inhibitors. Reported side effects include sweating, feeling hot and mood changes.
The amount in one gummy is far smaller than the doses behind those notes. Even so, the label asks anyone with a known medical condition to consult a physician first, and it limits use to adults. If you take heart, blood-pressure, diabetes or hormone medicine, speak with a clinician before you start. See safety and interactions for the full list.
Frequently asked questions
How much horny goat weed is in Horse Fuel?
100 mcg per gummy of a 10:1 Epimedium leaf extract. That was drawn from about 1 mg of raw leaf.
What is horny goat weed used for?
It is used in traditional herbal formulas for fatigue and sexual problems. Memorial Sloan Kettering says more studies are needed to verify such effects.
Who should not take horny goat weed?
MSK says not to take it with a heart condition, with medicines processed by CYP3A4, or with aromatase inhibitors. Ask a doctor first if any of these apply.
Our view
Horny goat weed in Horse Fuel is a small, clearly labeled part of a broad men's gummy: 100 mcg of a 10:1 leaf extract, printed on its own line. It brings a long traditional history, and the research says more study is needed.
Read it as one piece of the formula, check the cautions if you have a heart condition or take medicine, and keep to one gummy a day.
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