Mars Men Supplement Review: 11 Ingredients Checked Against the Trials

Search “Mars Men supplement review” and you mostly find testimonials, gym videos and the brand’s own before-and-after lab screenshots. None of that answers the useful questions: what is in the capsules, how much, and whether anyone has tested those amounts for testosterone. So we read the label and checked each line against the human trials.

What Mars Men sells

Mars Men, whose site footer names Mars Health, Inc., sells two products: Boost Natural Testosterone Support and Ignite, a focus product. “Mars Men” in searches almost always means Boost, and the brand’s own FAQ calls it that: “Best results are achieved by taking 5 capsules daily in the AM with food.” This review covers Boost.

The pitch is a natural alternative to testosterone replacement therapy. The product page says: “Most testosterone-enhancing supplements do not contain proper dosages. At Mars Men, we utilize clinical doses of each ingredient.” Its headline statistic is “90% rated Mars Men effective at improving testosterone levels”, with a footnote: “Based on a survey of past and current Mars Men customers in 2026.” That is a customer survey, not a measurement.

The label: 11 ingredients, 5 capsules a day

The Supplement Facts panel on the product page lists 11 ingredients per five-capsule serving, and a bottle holds 30 servings. Unlike many testosterone blends, it states every amount; there is no proprietary blend.

Ingredient (per 5 capsules)	Amount
Vitamin D (cholecalciferol)	100 mcg (4,000 IU)
Vitamin K1 (phytonadione)	100 mcg
Vitamin K2 (MK-7)	100 mcg
Zinc (citrate)	30 mg
Copper (gluconate)	2 mg
L-taurine	750 mg
Cistanche stem extract	500 mg
Fenugreek seed extract	500 mg
Shilajit (mineral extract)	500 mg
Tongkat ali root extract	500 mg
Boron (citrate)	10 mg

Mars Men is not in the NIH Dietary Supplement Label Database, so the brand’s panel is the only label we could read. What the panel does not say matters as much as what it does: none of the four botanical extracts names an extraction ratio, a standardization or a branded ingredient. That is where “clinically dosed” runs into trouble, because the trials behind these botanicals mostly used specific branded extracts.

Ingredient by ingredient, against the human trials

We looked for randomized or controlled human studies that measured testosterone, and compared the amount used with the amount on the Mars Men label.

Ingredient	Mars Men, per day	What the human trials used	Fair match?
Zinc	30 mg	About 30 mg a day in 9 marginally zinc-deficient older men	Amount yes; only in deficiency
Shilajit	500 mg	250 mg twice a day of a purified, branded extract	Amount yes; extract not named on label
Boron	10 mg	10 mg a day for one week in 8 men	Amount yes; tiny, short study
Vitamin D	4,000 IU	About 2,860 IU a day (20,000 IU a week) in two trials	Similar amount; no testosterone effect
Tongkat ali	500 mg	100 to 200 mg a day of a standardized water extract	Not comparable; extract unknown
Fenugreek	500 mg	600 to 1,800 mg a day of branded extracts	Below; extract unknown
Cistanche	500 mg	10 g a day (5 g twice daily) in one trial	One-twentieth
Taurine	750 mg	No human testosterone trial found	No
Copper, vitamins K1 and K2	2 mg, 100 mcg, 100 mcg	Not testosterone ingredients	—

So, by our reading, three of the eleven amounts match a human testosterone trial. Each match comes with a catch.

Zinc, shilajit and boron: the three matches

Zinc. In a 1996 study, nine marginally zinc-deficient older men took 459 micromoles of zinc a day, about 30 mg, and their testosterone rose from 8.3 to 16.0 nmol/L over three to six months. The same paper showed testosterone falling when young men’s zinc intake was restricted. That supports correcting a deficiency, not adding zinc when you already have enough. Mars Men’s 30 mg is under the 40 mg adult upper limit, and the 2 mg of copper is a sensible pairing for long-term zinc use.

Shilajit. A randomized trial gave men aged 45 to 55 purified shilajit, 250 mg twice a day for 90 days, and total testosterone, free testosterone and DHEAS rose compared with placebo. A 2024 systematic review of testosterone boosters identifies that ingredient as a branded purified extract, PrimaVie, and rates it “possibly effective” for men with low testosterone from ageing. Mars Men’s label says “Asphaltum s. Mineral Extract” with no brand or purification standard, so you cannot tell whether it is the material that was tested.

Boron. Eight healthy men took 10 mg of boron a day, and after one week “the mean plasma free testosterone increased and the mean plasma estradiol decreased significantly.” Ten milligrams is half the 20 mg adult upper limit. But eight men for a week, with no separate placebo group running in parallel, is a signal, not a result.

Vitamin D: the most studied ingredient did not raise testosterone

Vitamin D has the strongest trials of anything on this label, and they point the other way. In a randomized trial of 98 healthy men with normal testosterone, 20,000 IU a week for 12 weeks “had no effect” on total testosterone. A second trial by the same group, in 94 men with low testosterone, found the same: “no effect.” A 2026 meta-analysis pooling 11 comparisons concluded that randomized evidence “does not demonstrate a statistically clear or reproducible effect of vitamin D supplementation on total testosterone.”

Mars Men’s 4,000 IU also equals the NIH upper limit for adults, 100 mcg a day. That is not a dangerous amount on its own, but anyone also taking a multivitamin or a separate vitamin D supplement would go over it. Our vitamin D shots vs pills guide covers who actually benefits from supplementing.

Tongkat ali: real evidence, unknown extract

Tongkat ali has the best testosterone evidence among the botanicals here. A 2022 meta-analysis of five randomized trials found a significant rise in total testosterone, especially in men with low levels, while noting that “more research is required before its use in clinical practice.” The trials largely used standardized water extracts at modest amounts; one, run by the extract’s maker, gave 100 or 200 mg a day of Physta to men aged 50 to 70 with low testosterone.

Mars Men’s 500 mg is more than that by weight, but an unstandardized “root extract” could be anything from a concentrated extract to lightly processed root. Without the ratio, the milligrams cannot be compared.

Fenugreek and cistanche: below the tested amounts

The fenugreek trials used branded extracts at 600 mg a day or more. In a 2024 trial of one branded extract at 600 to 1,800 mg, plasma testosterone rose from baseline “but not vs. placebo.” A 2026 meta-analysis found a small effect on total testosterone with “very low” certainty and concluded that “current evidence does not support clinical or commercial testosterone-boosting claims.” Mars Men’s 500 mg of unnamed extract sits below those amounts.

The one cistanche trial we found gave 5 g of extract twice a day, 10 g in total, to men doing resistance training, and testosterone improved; the study was sponsored by the company that supplied the extract. Mars Men’s 500 mg is one-twentieth of that.

We found no human trial of taurine on testosterone; our PubMed search returned only multi-ingredient sports drinks.

The claims, side by side with the evidence

The product page says that “within the first week, most men experienced out of this world increases in energy, improved sleep quality, and heightened mental focus.” We found no trial of Mars Men that measured any of those things, and the brand does not cite one. A 2024 systematic review of 52 studies of testosterone boosters found that “most fail to increase total testosterone”, with a few ingredients rated possibly effective, mainly in men whose testosterone was already low.

That fits the pattern on this label. The ingredients with positive testosterone results were mostly tested in men who were deficient or had low testosterone. If your levels are normal, the evidence that any of this raises them is thin. If you suspect low testosterone, the useful first step is a morning blood test with your doctor, which also catches causes a supplement would hide.

Price and refund terms

On 15 October 2026 the product page offered a subscription at $39 for the first 30-day bottle during a sale, then $59 a bottle for later orders, or $47 a bottle on a 90-day plan. Buying once without a subscription cost $118 plus $7 shipping. By our arithmetic, that is about $1.30 a day for the discounted first month, $1.97 a day on the regular subscription, and $4.17 a day for a one-time bottle. The FAQ answers “Do I have to sign up for a subscription?” with “Yes”, although a one-time option was on sale on the same site.

The refund policy offers “a 90-day guarantee on the first qualifying order only.” It does not apply to “repeat orders, subscription renewals, duplicate purchases”, it requires that the product was used as directed, and “A $7 refund processing fee will be deducted from approved refunds” unless the refund is for a Mars Men error or a defective or incorrect item.

What we checked on regulators and complaints

On 15 October 2026 we searched the FDA’s warning letter database for “Mars Men”, “Mars Health” and “mengotomars”. The results matched only the words “men” or “health” in unrelated letters, and none named the company; the same search for “kratom” returned 13 letters, so the search worked. We tried to search the FTC’s case library, but it returned the same listing for every query, so we could not complete that check.

The Better Business Bureau profile for Mars Men, in Greenville, Wisconsin, shows BBB accreditation since 26 March 2026 and an A rating. It also shows 46 complaints, all filed in the last 12 months: 25 about product issues, 8 about delivery, 8 about service, 2 about billing, and one each about customer service, an order, and sales and advertising. Thirty were marked answered and 16 resolved. That is what we checked, not a guarantee that no other complaints or actions exist.

Who might consider it, and what to do instead

If you want to try Mars Men, read the refund terms first: the guarantee covers only your first order, so a 90-day plan bought later is not covered. Check the vitamin D in anything else you take, because Boost alone reaches the adult upper limit. If you take prescription medicines, especially for blood sugar, blood pressure or hormones, ask your doctor or pharmacist before starting a multi-herb product.

If testosterone is the real concern, a blood test comes first. The ingredients with the clearest human evidence help mainly when something is low, and you can buy zinc or vitamin D separately at a fraction of the price if a test shows you are short. Our guide to supplements for men covers what is worth taking and what is mostly marketing.

The bottom line

Mars Men Boost is more transparent than many testosterone blends: every amount is on the label, with no proprietary blend. But “clinically dosed” holds for only three of its eleven ingredients, each with a catch. Its most studied ingredient, vitamin D, did not raise testosterone in randomized trials, and its headline “90% effective” figure is a customer survey. We found no trial of the formula. The better-evidenced route is a blood test, then fixing whatever it actually shows.

We do not link to Mars Men, and no company paid for this review.