Most clinical trials on maca root use doses between 1.5 and 3.5 grams per day, taken for 6 to 16 weeks. That range covers the majority of studied benefits, from sexual health to menopausal symptom relief to athletic performance. The right amount for you depends on what you’re taking it for, which form you’re using, and how your body responds.
The Standard Dose Range
Across dozens of human studies, 1.5 to 3 grams per day is the most common dosing window. In a well-known pilot study on sexual health, researchers tested 1.5 g/day (the low dose) against 3.0 g/day (the high dose), with the higher amount showing stronger results. The 3 g group took six 500 mg capsules daily, while the 1.5 g group took six 250 mg capsules.
If you’re new to maca, starting at 1.5 grams per day and working up over a couple of weeks is a sensible approach. This gives your digestive system time to adjust and lets you gauge how you feel before increasing.
Doses by Goal
Sexual Health and Libido
Studies on sexual function typically use 1.5 to 3 grams per day. Research in healthy men aged 21 to 56 tested both doses and found improvements in sexual desire without any changes to hormone levels. A study in people with antidepressant-related sexual side effects found that the 3 g/day dose was more effective than 1.5 g/day. If libido is your primary reason for taking maca, aiming for the higher end of the range (around 3 grams) is reasonable.
Menopausal Symptoms
For hot flashes, night sweats, mood swings, and sleep disruption, a clinical trial using a pre-gelatinized form found that 2 grams per day (four 500 mg capsules) significantly relieved symptoms after two months. That study also reduced markers associated with stress and improved body composition measures. Researchers noted that most women need 1.5 to 2 grams daily, though some respond well to as little as 1 gram.
There’s an important nuance here: taking too much can actually increase hot flashes rather than reduce them. If you notice your symptoms getting worse, cutting the dose in half for a week and reassessing is the standard recommendation from clinicians who work with maca regularly. Some women are more sensitive, and finding the minimum effective dose matters more than pushing for a higher one.
Athletic Performance
Athletes tend to use higher doses. In a study of elite athletes across swimming, racket sports, and shooting, participants took 5 grams per day of concentrated black maca extract (2,500 mg twice daily) for eight weeks. After that period, researchers measured significant improvements in muscle endurance, power, agility, and flexibility, along with reduced inflammation markers and lactic acid levels. This is at the upper end of what’s been studied in humans and well above the general-use range.
Maca Color Matters
Maca comes in yellow, red, and black varieties, and they aren’t interchangeable. Yellow maca is the most common and the most studied for general use and male fertility. One trial gave infertile men 2.8 grams per day of yellow maca extract for 16 weeks and found a 40% improvement in sperm concentration. Black maca is the variety most tested for athletic performance and energy, with trial doses ranging from 1.75 to 5 grams per day. Red maca has been studied at 3 grams per day for general health markers.
The research is still too limited to say definitively that one color is best for one purpose. But patterns are emerging, and if you’re choosing a product, matching the color to your goal is worth considering.
Raw Powder vs. Gelatinized vs. Extracts
The form you choose affects how much you need to take. Raw maca powder is the least processed and contains all of the plant’s starch, which can cause bloating or mild cramping in some people. Gelatinized maca has had most of its starch removed through a cooking process, making it easier to digest and slightly more concentrated gram for gram.
Extracts are the most concentrated option. Products labeled as 4:1 or 6:1 extracts pack the equivalent of 4 or 6 grams of raw powder into a single gram. If you’re using an extract, the dose on the label will be much smaller (often 500 to 1,000 mg) but may deliver the same active compounds as several grams of whole powder. Always check whether a product lists the raw powder equivalent so you can compare accurately.
For raw or gelatinized powder, 1.5 to 3 grams per day remains the target. For concentrated extracts, follow the label’s conversion ratio and aim for the equivalent of that same range.
How Long It Takes to Work
Maca is not a quick fix. Most clinical trials run for 6 to 16 weeks before measuring outcomes. The menopause study saw significant changes at the two-month mark. The athletic performance study ran for eight weeks. If you’ve been taking maca for two weeks and feel nothing, that’s normal. Give it at least six to eight weeks at a consistent dose before deciding whether it’s working.
Safety and Side Effects
Maca is considered likely safe when consumed in food-level amounts, and the doses used in clinical research (up to 5 g/day) have not produced serious adverse effects. It does not appear to alter hormone levels directly. Studies measuring testosterone, estrogen, and other reproductive hormones in men taking up to 3 g/day found no changes compared to placebo.
Native Peruvians eat maca as a dietary staple at amounts exceeding 20 grams per day in its dried form, which provides some reassurance about long-term safety at supplemental doses. That said, most clinical trials cap at 12 to 16 weeks, so data on years of continuous supplemental use is limited.
Maca belongs to the cruciferous vegetable family, the same group as broccoli and cabbage. These plants contain compounds called goitrogens that can theoretically interfere with thyroid function in people who already have thyroid conditions, particularly if iodine intake is low. If you have a thyroid disorder, this is worth discussing with your provider before starting maca at any dose. For people with normal thyroid function, the amounts used in studies are not a concern.
Practical Tips for Taking Maca
Clinical trials generally have participants take maca with meals, and the menopause study specifically instructed participants to take their capsules twice daily with food. Taking it with a meal may reduce the chance of digestive discomfort, especially with raw powder. Splitting your dose into two servings (morning and midday, for example) mirrors how most studies administer it and keeps levels more consistent through the day.
If you’re using powder rather than capsules, it blends easily into smoothies, oatmeal, or coffee. The flavor is malty and slightly earthy. Start with a half teaspoon (roughly 1.5 grams) and increase to a full teaspoon or tablespoon depending on your target dose. A kitchen scale is the most accurate way to measure loose powder, since density varies between brands.