Mars Men is a testosterone (T) supplement for men. The brand describes their supplement as "The Most Potent & Natural Testosterone Stack," and claims their supplement is "Clinically Dosed."

But does Mars Men contain research-backed ingredients for increasing T? Does it contain any unhealthy ingredients? Has it been proven to work in research studies? And is it better or worse than popular T-boosting supplements like Roman Testosterone Support?

In this article we'll answer all of these questions and more, as we analyze the ingredients in Mars Men to give our take on whether or not it's likely to be effective for optimizing T levels in men, and whether or not it's healthy.

We'll share our concerns with some of the clinical claims on the brand's website, and compare Mars Men to other popular T-boosting supplements to pick our winners (and losers).

Key takeaways:

• Highly potent formulation and should be effective
• Some doses are higher than we're comfortable with
• We do not currently recommend Mars Men

Ingredient Analysis

The active ingredients in Mars Men are shown below:

Vitamin D is included at a relatively high dose of 100 micrograms (mcg), or 500% Daily Value (DV).

While vitamin D3 supplementation can increase T levels in men with vitamin D deficiency, we haven't come across any clinical evidence suggesting that its supplementation is beneficial in men with healthy serum vitamin D levels.

This dose is around 40% of the suggested acute toxicity threshold established in a medical review published in the Frontiers in Endocrinology journal, and seems illogical to take without an established vitamin D deficiency, particularly considering that other supplements and foods can contain vitamin D.

Zinc is also included at a dose of nearly 300% DV.

Tongkat ali extract is clinically shown to increase T levels, but the dose in this supplement is high enough to be slightly concerning to us.

A 2022 meta-study on tongkat ali supplementation for T levels analyzed data from nine clinical trials on the topic, and none included a dose as high as in Mars Men (in some cases the dose in Mars Men is 500% higher than that in the study).

Fenugreek seed extract is another research-backed active ingredient that's included at a very high dose.

We cannot identify any human safety studies on this compound proving that long-term use at this dose is safe.

Boron is a mineral that's clinically shown to support optimal T levels, as we documented in our T-Hero reviews article.

The inactive ingredients in Mars Men, shown below, should be safe and non-toxic:

Overall, we consider Mars Men likely to support optimal T levels.

We do not currently recommend this supplement due to our concerns over the relatively high levels of some active ingredients.

We're not suggesting that these doses are necessarily harmful; we're simply stating that we prefer to recommend supplements that use active ingredient doses well within reference ranges which are shown to be safe in human trials.

Questionable Health Claims on Brand Website

There are a number of questionable health claims on the Mars Men website which we disagree with from a scientific and ethical perspective.

The brand's website publishes a graphic, entirely without citation, suggesting that 90 year old men taking their supplement can attain total testosterone (TT) levels above 700 nanograms per deciliter (ng/dL):

image source: mengotomars.com

The graphic also seemingly suggests that men aged 30 taking their supplement will experience (slightly) lower TT levels than men aged 90, which makes no biological sense.

The brand's website also describes testosterone replacement therapy (TRT), which is FDA-approved for use in men with low T, to confer "significant risks:"

image source: mengotomars.com

While we do not promote TRT, we strongly disagree with this comparison.

Describing an extremely well-studied medical protocol as having "significant risks" and a dietary supplement with a proprietary blend that does not appear to have been studied in one single clinical trial as having "minimal risk" is not appropriate or scientific.

Positive Third-Party Test Results

One commendable thing about the Mars Men brand is that the company publishes third-party test results on their website, which is still unfortunately rare in the US supplement industry.

As shown in the graphic below, the most recent test result shows that Mars Men's supplement contains relatively low (or non-detectable) levels of heavy metal contaminants:

image source: mengotomars.com

It's notable that Mars Men does not appear to publish label accuracy testing (which would prove that their supplement contains the active ingredients at their stated doses), just contaminant testing.

However, this is still much better than the average US supplement brand.

Mars Men vs. Popular T-Boosters

Here's how Mars Men compares to other popular T-boosting supplements in terms of potential efficacy and healthiness, in our opinion:

Roman Testosterone Support

From a potential efficacy perspective, Mars Men is the clear winner here.

As we documented in our Roman Testosterone Support reviews article, upon our last analysis of the brand, there was an ingredient discrepancy between Amazon and website labels.

At least with Mars Men, you know what you're getting.

Winner: Mars Men

Nugenix

While some of the brand's formulations contain inactive ingredients clinically shown to have negative effects on insulin levels, we do not have the same concerns about relatively high active ingredient dosing.

From a healthiness perspective, we give Nugenix the edge.

Winner: Nugenix

Vintage Muscle

Significantly riskier than Mars Men; this brand was selling illegal anabolic steroids at the time of our last analysis.

Winner: Mars Men

Mars Men Pros and Cons

Pros:

• Highly potent formulation
• Third-party contaminant testing
• Likely to support optimal T levels
• Clean inactive ingredient profile

Cons:

• Questionable health claims on website
• Relatively high vitamin D dose
• Relatively high zinc dose
• Relatively high fenugreek seed dose
• Relatively high tongkat ali dose
• Doesn't appear clinically tested

Conclusion

Mars Men is one of the most potent T-boosting supplement formulations we've reviewed to date on Illuminate Health, so the brand is true to some of its marketing claims in that regard.

We believe that Mars Men supplementation is likely to support optimal T levels, at least short-term.

We are not comfortable recommending supplements with active ingredients at doses we cannot find safety data in humans to support.

We would recommend that consumers speak with their doctor prior to using this supplement long-term, particularly in regard to the vitamin D3, zinc, tongkat ali extract and fenugreek seed extract doses.

Mars Men publishes third-party contaminant testing which is a sign of a high-quality brand, but makes highly questionable health and marketing claims on their website, which we see as a sign of a low-quality brand.

We consider Mars Men to be a better option than Roman Testosterone Support and Vintage Muscle, but a worse option (from a health, rather than efficacy, perspective) than Nugenix.