Maca root is an Andean cruciferous plant (Lepidium meyenii) grown above 4,000 meters in Peru and used as food for over 2,000 years. Its dried root supplies macamides and glucosinolates, and modern trials show modest support for libido and some menopausal symptoms.
This article covers what the published evidence actually shows: what maca is, its active compounds, the yellow, red and black color types, the powder versus capsule forms, and an honest look at what it does and does not do.
Quick Answer: What Is Maca Root?
Maca root is a Peruvian Andean vegetable in the cruciferous family, eaten as food and taken as a supplement. Randomized trials show modest benefits for sexual desire, but maca does not reliably raise testosterone. A typical capsule supplies 1000 mg of dried root.
Key Takeaways
- Maca (Lepidium meyenii) is a Peruvian root grown above 4,000 m.
- Active macamides and glucosinolates power most of maca's 2,000-year food use.
- Maca has 3 color types: yellow, red and black roots.
- Trials show modest libido benefit over 6 to 12 weeks of use.
- Maca did not raise testosterone in 2 controlled studies of men.
- A standard supplement dose is 1000 mg of dried root per serving.
What Maca Root Actually Is
Maca root is the edible tuber of Lepidium meyenii, a hardy plant in the Brassicaceae (cruciferous) family alongside broccoli, radish and cabbage. It grows almost nowhere else on Earth except the Peruvian Andes at altitudes between 4,000 and 4,500 meters, where few crops survive frost, wind and intense ultraviolet light.[1]Medicinal Effects of Peruvian Maca — Food & Function (2020) View source
Indigenous Andean communities have cultivated and eaten maca for more than two millennia, both as a staple food and as a traditional tonic. The dried root is ground into a fine, earthy-tasting flour that you can read more about in the proven benefits of maca root.
- Family: Brassicaceae (cruciferous), like broccoli and radish.
- Origin: Peruvian Andes, 4,000 to 4,500 meters elevation.
- Edible part: the dried hypocotyl (root-like storage organ).
- Common name in Spanish: maca; also called Peruvian ginseng.
Botanically, maca is a vegetable first and a supplement second. That food-grade history is one reason it carries a long record of everyday tolerability, which matters when you compare it to herbs used only in concentrated extracts.
Active Compounds in Maca
Maca contains two compound classes found almost nowhere else: macamides and macaenes, plus the glucosinolates typical of cruciferous plants. These molecules, not vitamins or stimulants, are what researchers most often credit for maca's studied effects.[2]Maca Glucosinolates and Macamides — Natural Products and Bioprospecting (2018) View source
Macamides are unique fatty-acid amides that form during drying and processing. Their concentration varies widely between farms, harvests and color types, which helps explain why study results are not always consistent across products.[3]Chemical and Pharmacological Variability of Maca — Frontiers in Pharmacology (2024) View source
| Compound class | What it is | Why it matters |
|---|---|---|
| Macamides | Fatty-acid amides unique to maca | Most-studied bioactive group |
| Glucosinolates | Sulfur compounds from cruciferous plants | Source of the thyroid (goitrogen) caution |
| Sterols and amino acids | Plant fats and protein building blocks | Contribute to nutritional value |
| Fiber and starch | Carbohydrate bulk of the root | Why maca is a food, not a stimulant |
Importantly, maca contains no caffeine and no recognized stimulant. Any reported energy effect comes from these whole-food compounds, not from a quick chemical lift.
Yellow, Red and Black Maca
Maca comes in three main color types, and they are not interchangeable. Roughly 60 to 70 percent of a typical harvest is yellow; red and black maca are scarcer and have drawn separate research interest for distinct purposes.[4]Maca Colors and Phytochemistry — Nutrients (2024) View source
Black maca has been studied more for stamina and sperm parameters, while red maca appears in animal models of prostate and bone health. These distinctions are preliminary, so treat color-specific claims with caution rather than chasing a single color for a specific result.
- Yellow maca: the most common and most general-purpose type.
- Red maca: studied in animal models of prostate and bone.
- Black maca: studied more for stamina and sperm parameters.
Powder vs Capsules: The Forms
Maca is sold mainly as loose powder or as capsules, and the choice is practical rather than medical. Powder lets you adjust the dose and blend it into smoothies, but it carries an earthy, slightly malty taste that many people find strong.
Capsules remove the taste and fix the dose. Remedy's 1000 mg maca root delivers a precise vegan serving with no flavor to mask, which suits anyone who dislikes the powder or wants travel-friendly consistency.
| Form | Best for | Trade-off |
|---|---|---|
| Powder | Smoothies, flexible dosing | Strong earthy taste |
| Capsules | No taste, precise 1000 mg dose | Less flexible to adjust |
| Gelatinized | Easier digestion | Some heat-sensitive loss |
| Raw | More heat-sensitive compounds | Can feel heavy on the stomach |
You may also see gelatinized maca, where heat removes raw starch to improve digestibility. Raw maca keeps more heat-sensitive compounds but can feel harder on the stomach for some people.
What the Evidence Shows
The strongest human evidence for maca is for sexual desire, and even there the effect is modest. Several small randomized trials report improved libido over 6 to 12 weeks, including studies in people taking antidepressants that lower sex drive.[5]Maca: From Tradition to Science — Forschende Komplementarmedizin (2009) View source
For menopausal symptoms, the evidence is limited to small pilot studies, and for energy and stamina most data come from animal models rather than people. None of this makes maca useless; it makes the honest claim "promising but preliminary," not "clinically proven." Set expectations accordingly:
- Modest support: sexual desire and some menopausal symptoms.
- Preliminary: energy, stamina and mood signals.
- Largely traditional: broad tonic and adaptogen claims.
Maca and Testosterone: The Honest Answer
Maca does not reliably raise testosterone, and this is the single most misreported fact about it. In a controlled study, maca improved sexual desire in men while leaving serum testosterone and estradiol unchanged, meaning its libido effect is hormone-independent.[6]Maca, Sexual Desire and Testosterone — Andrologia (2002) View source
Many supplement pages imply maca is a testosterone booster, which the data do not support. A separate study found maca did not significantly change LH, FSH, testosterone or estradiol in men.[7]Maca and Reproductive Hormones — Journal of Endocrinology (2003) View source If you are weighing maca for that reason, our the maca for men guide walks through what the trials actually measured.
- Testosterone: unchanged in controlled trials of healthy men.
- LH, FSH and estradiol: not significantly altered by maca.
- Sexual desire: improved despite no hormone shift.
This honesty cuts both ways. Because maca works through pathways other than sex hormones, it may help desire without the hormonal effects (or risks) that come with testosterone-altering products.
Who Uses Maca and Why
Maca is used by both women and men, and the reasons differ by goal. Women often try it for libido, mood and menopausal comfort, with the caveat that menopause studies remain small and early.
Men commonly use maca for sexual desire and stamina, while a few studies have looked at semen parameters. In either case, it is not a hormone-replacement or fertility treatment, and the women's evidence in particular comes from small, early pilot studies.
- Women: libido, mood and menopausal comfort (small studies).
- Men: sexual desire and stamina (modest evidence).
- General: daily food-grade tonic with a long use history.
How to Take Maca Root
Most studied doses fall between 1.5 and 3 grams per day, taken with food and used consistently over several weeks. A single 1000 mg capsule is a sensible starting serving you can build from, since maca is a food and effects accumulate gradually rather than in one dose.
Start low, take it with a meal, and give it a fair trial of 8 to 12 weeks. For exact ranges and timing, see Remedy's maca dosage breakdown.
- Start low: 1000 mg (one capsule) for the first week.
- Take with food: a meal improves comfort and routine.
- Be consistent: daily use for 8 to 12 weeks.
Safety and When to Be Cautious
Maca is generally well tolerated at food and supplement doses, with toxicology studies finding no notable harm at tested amounts.[8]Maca Safety Evaluation — Regulatory Toxicology and Pharmacology (2020) View source Still, a few groups should take care.
Because maca is cruciferous and contains glucosinolates, people with thyroid concerns should be aware of the goitrogen note; gelatinized or cooked maca lowers this. Those with hormone-sensitive conditions, and anyone pregnant or breastfeeding, should consult a clinician first.
- Thyroid: glucosinolate (goitrogen) caution; cooking or gelatinizing helps.
- Hormone-sensitive conditions: ask a clinician before starting.
- Pregnancy and breastfeeding: use only under medical guidance.
Frequently Asked Questions
What is maca root? +
Maca root is the edible tuber of Lepidium meyenii, a cruciferous Peruvian plant grown above 4,000 meters. People have eaten it as a food for over 2,000 years and now take it as a supplement, typically as a 1000 mg dose, for libido, mood and general wellness support.
What is maca root good for? +
Maca has the most randomized-trial support for sexual desire, with modest effects seen over 6 to 12 weeks. Small pilot studies suggest help with some menopausal symptoms, while energy and stamina claims rest mostly on traditional use and animal data. Set realistic expectations.
Does maca raise testosterone? +
No. In a 12-week controlled study, maca improved men's sexual desire while leaving serum testosterone unchanged, so its effect is hormone-independent. Despite common marketing claims, the evidence does not show maca acts as a testosterone booster, even when libido improves.
Does maca have caffeine? +
No, maca contains 0 mg of caffeine and no recognized stimulant. Any reported energy effect comes from its whole-food compounds, such as macamides, rather than a quick chemical lift. That makes it suitable to take later in the day without disrupting sleep for most people.
What are the types of maca? +
There are 3 main color types: yellow, red and black maca. Yellow is the most common, making up roughly 60 to 70 percent of harvests. Black maca has been studied more for stamina and sperm, while red maca appears in animal models of prostate and bone health.
How much maca should I take per day? +
Most studies use 1.5 to 3 grams per day, taken with food and used consistently. A single 1000 mg capsule is a sensible starting serving you can build from. Start low, give it 8 to 12 weeks, and adjust based on how you respond rather than expecting overnight results.
How long does maca take to work? +
Plan on 6 to 12 weeks of daily use before judging results. Because maca is a food rather than a fast-acting stimulant, its effects accumulate gradually. Trials reporting libido benefits typically ran 8 to 12 weeks, so consistency over several weeks matters far more than any single dose.
Is maca powder or capsules better? +
Neither is medically superior; the choice is practical. Powder lets you adjust the dose and blend it into smoothies but has a strong earthy taste. Capsules fix a precise 1000 mg dose with no flavor and travel well. Pick the form you will actually take consistently.
Does maca cause weight gain? +
Maca itself is not shown to cause weight gain; a 1000 mg capsule adds essentially no calories. The powder used in smoothies contributes some carbohydrate and starch, so any change usually reflects the overall recipe, not maca. It is not a weight-loss or weight-gain drug.
Is maca safe to take daily? +
For most healthy adults, maca is well tolerated daily at 1000 mg, and toxicology studies found no notable harm at tested doses. Because it is cruciferous, people with thyroid concerns should note the goitrogen caution, and anyone pregnant, breastfeeding or on hormone-sensitive treatment should ask a clinician first.
What is gelatinized maca? +
Gelatinized maca is 1 of 2 main forms; it is heat-processed to remove raw starch, which improves digestibility for people who find raw maca heavy on the stomach. Gelatinizing also lowers the glucosinolate (goitrogen) load slightly. Raw maca keeps more heat-sensitive compounds but can be harder to digest.
Can men and women both take maca? +
Yes, both use maca, though the 2 groups have different goals. Women often try it for libido, mood and menopausal comfort, supported by small studies. Men commonly use it for sexual desire and stamina, with modest trial support. In both cases it is a wellness supplement, not a hormone treatment.
Related Reading
- Maca for menopause and libido
- Powder or capsules for maca
- Black vs red vs yellow maca
- Maca Side Effects and Safety
