Black maca is the most studied and most frequently recommended variety for men, with the strongest research support for sexual desire, physical performance, and fertility. Red maca has a separate niche worth knowing about, particularly for prostate health. Yellow maca is the most common and least specialized of the three. Here’s what the research actually shows for each color and how to choose between them.
Black Maca for Libido and Performance
Black maca has the most research behind it for the goals most men are searching for: better sex drive, more energy, and improved physical performance. In a clinical trial of healthy men aged 21 to 56, maca improved sexual desire starting at 8 weeks of daily use. That improvement was independent of testosterone and estrogen levels, meaning maca’s effect on libido appears to work through a different pathway than simply raising hormones.
For athletic performance, a study of elite male athletes found that 14 days of black maca supplementation improved the time it took trained cyclists to complete a 40 km time trial, and the cyclists also reported increased sexual desire. A longer eight-week trial in fin swimming athletes showed measurable gains in grip strength, jumping power, flexibility, and agility after daily black maca use. Grip strength, for example, increased from roughly 35 kg to 39 kg, and standing long jump improved from about 198 cm to 222 cm.
If your primary goals are libido, energy, and exercise performance, black maca is the strongest pick based on available evidence.
Red Maca for Prostate Health
Red maca stands out for one specific benefit that neither black nor yellow maca provides. In animal studies, red maca significantly reduced prostate size in both normal rats and those with enlarged prostates, while black and yellow maca had no effect on prostate weight at all. This reduction happened within just 7 days of supplementation and occurred without changing testosterone or estrogen levels.
Red maca also tends to be higher in protein and potassium compared to black maca. If you’re an older man concerned about prostate health or already dealing with early signs of benign prostate enlargement, red maca may be worth considering, either on its own or alongside black maca. Keep in mind, though, that the prostate research has only been done in rats so far.
Yellow Maca: The Common Variety
Yellow maca is the most widely harvested and the most frequently sold variety. It’s what you’re likely getting when a product label simply says “maca root” without specifying a color. Many of the older clinical trials on sexual desire and general well-being used yellow maca or didn’t distinguish between colors, so it does have some research backing for libido and mood.
That said, yellow maca hasn’t shown the same targeted benefits as black maca for performance or red maca for prostate health. It has a notably higher concentration of a specific fatty acid called elaidic acid, though the practical significance of that difference isn’t clear yet. For men looking for a general-purpose supplement without a specific goal, yellow maca is fine. For targeted benefits, the other colors are better supported.
Maca Doesn’t Raise Testosterone
One of the most common misconceptions about maca is that it works by boosting testosterone. Clinical data tells a different story. In trials measuring serum testosterone and estradiol in men taking maca, hormone levels didn’t change. The improvements in sexual desire were statistically independent of testosterone, depression scores, and anxiety scores. Whatever mechanism maca uses to improve libido, it isn’t a hormonal one in the traditional sense. If you’re hoping maca will show up on a blood test as higher testosterone, it won’t.
How Much to Take
Most clinical trials in men have used doses between 1.5 g and 3.0 g per day. In a dose-finding study, the 3.0 g/day group saw statistically significant improvements in sexual function scores, while the 1.5 g/day group improved but fell just short of significance. For libido specifically, a separate trial found that both 1.5 g and 3.0 g per day improved sexual desire by 8 weeks with no clear separation between doses.
A reasonable starting point is 1.5 g daily, working up to 3.0 g if you don’t notice results after several weeks. The key takeaway from the research is that maca isn’t fast-acting. Expect to wait at least 8 weeks before noticing changes in desire or energy. The erectile dysfunction trial that showed positive results used 2.4 g per day for 12 weeks, so patience matters.
Gelatinized vs. Raw Powder
Maca root comes in two main forms: raw powder and gelatinized. “Gelatinized” has nothing to do with animal gelatin. It refers to a heat-and-pressure process that breaks down the starch in the root, concentrating the active compounds and making the powder significantly easier to digest. People who experience gas, bloating, or stomach discomfort with raw maca often tolerate the gelatinized version without issues.
If you have a sensitive stomach or plan to take maca daily at higher doses, gelatinized maca is the more practical choice. Raw maca retains all its original fiber and starch, which some people prefer for nutritional completeness, but it can be rough on digestion. Both forms deliver the same core compounds, so this decision is mainly about comfort and absorption rather than effectiveness.
How to Choose the Right Product
Look for a product that specifies the color of maca on the label. Many supplements blend all three colors together, which dilutes the targeted benefits of any single variety. If your goal is sexual health and energy, choose a product labeled specifically as black maca. If prostate support is a priority, look for red maca. Combination products aren’t necessarily bad, but you’ll need higher total doses to get meaningful amounts of each color.
Origin matters too. Research has found compositional differences between maca grown in Peru (where it’s native to the high Andes) and maca cultivated in other countries like China. Altitude affects the plant’s phytochemical profile, with higher elevations producing more of the beneficial compounds called glucosinolates. Peruvian-grown maca from the Junín plateau, harvested at elevations above 4,000 meters, is generally considered the standard for quality.
Research differentiating the clinical effects of maca colors in humans remains limited overall. Most trials have been small, and the prostate research is still preclinical. But among the options available, the evidence points clearly toward black maca as the best general-purpose choice for men, with red maca as a strong complement for those with prostate concerns.