Black vs Red vs Yellow Maca: Does Colour Matter?
Educational summary — not medical advice. Colour is a label-disclosure and chemistry fact, not a guarantee of any effect — see does maca work? for the broader evidence. This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
Yes, maca's colour can matter, and most labels don't tell you which one you're buying. Up to seventeen colour phenotypes of maca exist, and colour, growing location, cultivation and post-harvest processing all change its chemistry (Nutrients 2024). The one trial that compared colours head-to-head found red maca worked better for mood and energy, while black maca lowered blood glucose (Gasco 2016). Clinical research separating the colours is still limited. See every tracked product's cost and colour disclosure before you buy.
What's the difference between black, red and yellow maca?
Maca isn't one uniform root. Up to seventeen colour phenotypes have been documented, and a 2024 review found that colour, hypocotyl size, growing location, cultivation practices and post-harvest processing all significantly change the plant's nutrient content and phytochemical profile (PMID 38398854). The same review is blunt about the state of the science: clinical research that separates the colours from each other and tests them individually remains limited.
That gap matters because most maca marketing treats "maca" as one thing. It isn't. A capsule of black maca and a capsule of yellow maca are not interchangeable just because both say "maca root" on the label.
The one trial that actually compared colours
A 2016 randomized, double-blind, placebo-controlled trial gave 175 people either black or red spray-dried maca extract at 3 g/day for 12 weeks, at both low and high altitude (PMID 27548190). Red maca came out ahead on mood, energy and quality of life, and it reduced chronic-mountain-sickness score. Black maca reduced blood glucose. Black maca (and red maca to a lesser degree) also lowered hemoglobin, but only in highland residents whose hemoglobin was already abnormally high — it did not do this in people living at low altitude. The trial reported good acceptability and no serious adverse effects.
This is the best human evidence you'll find comparing maca colours directly. It is also just one trial, in a population that was partly high-altitude Andean residents, so treat the specifics as a starting point, not a universal rule.
As an Amazon Associate we earn from qualifying purchases. This is the only product we track that names a single colour on its label — not a claim that it beats the others.
Why most labels never say which colour is inside
Of the 3 maca products we track, 1 says nothing about colour at all, and only 1 names a single phenotype on the label. The remaining product, NusaPureMaca Root Black, Red & Yellow 750 mg (180 Vcaps, 180 Servings), is marketed as a black/red/yellow blend but discloses no proportion of each colour. A tri-colour blend with no stated ratio can't be matched to the colour trial above, because you don't know how much of the tested colour is actually in the capsule.
If a trial found an effect specific to one colour, buying a product that never names its colour means you can't verify you're getting anything close to what was studied. That's a label-disclosure problem, not a claim that unlabeled maca doesn't work.
The one-line takeaway Colour changes maca's chemistry, one solid trial found real colour-specific differences, and most labels don't tell you which colour you're buying. If you want to match a study, look for a product that names a single colour rather than a silent or unproportioned blend.
Frequently asked questions
How many colours of maca are there?
Up to seventeen colour phenotypes have been identified in Lepidium meyenii. Colour, hypocotyl size, growing location, cultivation method and post-harvest processing all significantly affect its nutrient content and phytochemical profile, and research that clinically separates the colours from one another remains limited.
Is black maca better than red maca?
It depends what you want. In the one trial that compared them directly (n=175, 3 g/day for 12 weeks), red maca extract worked better for mood, energy and chronic-mountain-sickness score, while black maca reduced blood glucose. Black maca also lowered hemoglobin, but only in highland residents whose hemoglobin was already abnormally high, not in people at low altitude.
Do maca supplement labels say which colour is inside?
Usually not. Of the 3 products we track, 1 state no colour at all and 1 names a single phenotype. A third is a black/red/yellow blend that doesn't disclose the proportion of each colour.
Does a tri-colour maca blend give you the benefits of the colour trials?
You can’t tell. The trials that found colour-specific effects dosed a single colour on its own. A blend with no stated ratio of black, red and yellow can’t be matched to any of those results, because you don’t know how much of the tested colour you’re actually getting.
Related
- Maca: the honest evidence
- Best maca by cost per studied dose — every tracked product, colour included
- Maca dosage guide — the 1,500–3,000 mg/day range and the capsule-math checker
- Does maca work? — the full evidence on desire, menopause and the testosterone myth
Sources
- "Not All Maca Is Created Equal: A Review of Colors, Nutrition, Phytochemicals, and Clinical Uses." Nutrients. 2024. PMID: 38398854 (up to 17 phenotypes; colour, origin, cultivation and processing affect chemistry; colour-specific clinical research remains limited).
- Gonzales-Arimborgo C, et al. "Acceptability, Safety, and Efficacy of Oral Administration of Extracts of Black or Red Maca (Lepidium meyenii) in Adult Human Subjects: A Randomized, Double-Blind, Placebo-Controlled Study." Pharmaceuticals (Basel). 2016. PMID: 27548190 (n=175, 3 g/day, 12 weeks).
- Manufacturer labels and live Amazon pricing for all listed products, July 2026. Full dataset: /maca/cost-by-brand.json (CC BY 4.0).