Ingredient
Maca in Stallion Power: Line 2 of 9, What the Research Says
Maca extract is the second ingredient in the Stallion Power blend. The label gives no amount, but the 82 mg total caps it at 41 mg per gummy, or 33.5 mg using the printed caffeine. Only a few small human trials exist, and reviewers call the evidence for sexual function limited.
Written by the Stallion Power label deskUpdated
The ingredient01
Maca on the Stallion Power label
Maca is the second ingredient in the blend, so only muira puama can weigh more. The label calls it “Maca Extract”.
The blend totals 82 mg per gummy, and the label prints no figure for maca. It does not say how the extract was made or how much root it stands for. Only caffeine has its own printed weight, at 5 mg (Stallion Power sales page).
| Name on the label | Maca Extract |
|---|---|
| What it is | Lepidium meyenii root |
| Place on the label | 2 of 9 in the 82 mg proprietary blend |
| Amount per gummy | Not listed; line 2 of 9 in the 82 mg blend: at most 41 mg by the plain rule, and at most 34 mg when the printed 5 mg of caffeine is used |
| Amount used in research | No dose in the sources read |
| Strength of evidence | Few small trials; limited evidence for sexual function |
| Marketed or traditional use | Andean root used for stamina and fertility |
| Main caution | May interfere with testosterone blood tests. Insomnia, mood and cycle changes reported. |
No study we found tested the finished gummy. What follows is about maca on its own.
The label arithmetic02
How much maca 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). Maca is second, so it cannot weigh more than half of 82 mg, which is 41 mg. The printed 5 mg of caffeine tightens that. Lines three and four must each weigh at least 5 mg, and caffeine is 5 mg. Line one is also heavier than maca. That makes the tighter ceiling 33.5 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. Maca can also sit anywhere from a few milligrams up to the ceiling.
Against the research03
What the trials found
A systematic review found four randomized trials of maca for sexual function. They covered healthy menopausal women, healthy men, healthy cyclists and men with erectile dysfunction. Two reported positive effects, one found none, and the trial in men with erectile dysfunction showed an effect on the IIEF-5 score. The authors called the evidence limited, because the trials were too few and too small (Shin 2010, Maca systematic review).
| Question | Answer from the sources |
|---|---|
| How many trials? | Four randomized trials in the 2010 review (Shin 2010, Maca systematic review); a few small trials per Memorial Sloan Kettering (MSK, Maca) |
| Result for men | Preliminary signs of better subjective sexual well-being; semen results mixed (MSK, Maca) |
| Dose used | Not stated in the sources we read |
| Stallion Power ceiling | At most 41 mg plain, 33.5 mg tighter (21 CFR 101.36, Supplement Facts) |
Without a study dose, we cannot compare the gummy to the trials, and we will not pretend to. A systematic review also found that high-dose maca eased sexual problems linked to antidepressants (MSK, Maca). That says nothing about a small share of a blend.
Strength of the evidence04
How strong is the evidence?
Limited. Memorial Sloan Kettering rates the evidence for sexual dysfunction as limited (MSK, Maca), and the review authors say the number, size and quality of trials were too small for firm conclusions (Shin 2010, Maca systematic review).
What the record offers
- Several small trials, some with positive results.
- Use as a food in its home region.
What the record lacks
- A stated dose in the sources we read.
- Large, high-quality trials.
- Any trial of the finished gummy.
The bottle says “BOOST PERFORMANCE†” and “SUPPORT CONFIDENCE†”. Neither names maca. The claims versus evidence page weighs them.
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 maca
Reported reactions include altered menstrual cycles, moodiness, cramps, gastritis and insomnia. Memorial Sloan Kettering also notes that maca may interfere with tests that measure testosterone, so tell your provider before lab work (MSK, Maca).
If you have a testosterone test coming, tell the clinic that you take a supplement with maca. Ask whether to pause it first.
- Pregnant, nursing, or with a hormone-sensitive cancer: talk to a provider first (MSK, Maca).
- Keep taking prescribed medicine as directed.
- 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).
See the side effects page and supplements and medications for the other lines.
The plain verdict06
What this means if you are deciding to buy
Maca is among the better-looked-at herbs in the blend, and the record is still thin. Small trials hint at benefit in desire. None used a dose we can match to a gummy. The real amount in your gummy is unknown (Shin 2010, Maca systematic review).
If you try it, 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 maca root?
Maca is an Andean root, Lepidium meyenii, used as food and as a supplement for stamina and fertility. Sellers market it for libido. The Stallion Power label lists it as “Maca Extract”, line 2 of 9, and gives no separate amount (Stallion Power sales page).
Does maca improve libido in men?
The evidence is limited. Memorial Sloan Kettering says only a few small human trials exist, and that preliminary findings for men suggest possible improvement in subjective sexual well-being (MSK, Maca). A systematic review of four trials also concluded that the evidence is limited (Shin 2010, Maca systematic review).
Is maca a stimulant?
The sources we read do not call it one, and we will not either. They do list insomnia and moodiness among reported reactions (MSK, Maca). The gummy also holds 5 mg of caffeine, which is a stimulant, so sleep can be affected for that reason too.
What is the difference between maca root and maca extract?
Root is the plant part. Extract is a concentrate made from it, and the strength varies by maker. The label says “Maca Extract” and does not state the ratio of root to extract, so the amount of root behind one gummy is unknown.
Should people with thyroid problems ask a doctor about maca?
Yes, as with any supplement. The sources we read do not discuss thyroid disease, so we cannot say maca is safe or unsafe for it. Memorial Sloan Kettering does advise talking to a provider if you have a hormone-sensitive cancer (MSK, Maca).
How long do maca studies run before showing any effect?
The sources we read do not give study lengths for the human trials (MSK, Maca) (Shin 2010, Maca systematic review). We will not guess. What they do show is that the trials were few, small and of modest quality.
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.
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