Maca roots and powder on a kitchen surface

Maca for Perimenopause: What the Evidence Shows

Maca is a Peruvian root that some women take during perimenopause for hot flushes, low mood and low energy. The evidence is small and preliminary. A few short trials report symptom relief, but the NHS says herbal products for menopause are not tested and regulated like medicines, so how safe and effective they are is not known. This guide covers what the studies tested, the doses and timescales used, who should check with a clinician first, and how to choose a powder if you decide to try one.

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TL;DR

  • Maca is a food-grade root powder, not a hormone. Trials suggest any effect works through routes other than direct oestrogen-like action.
  • The research is small and short. A systematic review of maca for menopausal symptoms judged the evidence limited.
  • Studies typically used 2,000 to 3,500 mg a day for 6 to 12 weeks. It is not an as-needed remedy.
  • It does not replace HRT or other treatment. Talk to a GP, nurse or pharmacist first, especially with a thyroid condition, a hormone-sensitive condition or regular medication.

Table of Contents

What maca is

Maca (Lepidium meyenii, also written Lepidium peruvianum) is a cruciferous root grown on the high plateaus of the Andes. It has been used traditionally as an energising vegetable, and the clinical pilot study most often cited in this area describes that history for both men and women.

The root comes in several colours, and the powder is usually sold either raw or in a gelatinised form. Gelatinised powder has been heat-treated to remove part of the starch. The researchers behind the main perimenopause pilot study used pre-gelatinised organic maca, a form intended to be easier to digest than raw powder. Raw maca can cause digestive discomfort in some people.

This matters when you read product claims. A study result applies to the preparation and dose tested, not to every maca product on a shelf.

What perimenopause symptoms people hope maca will help

Perimenopause is the run-up to your last period, when hormone levels fluctuate. Common symptoms include hot flushes, night sweats, disturbed sleep, low mood, anxiety, brain fog and a lower sex drive. The NHS lists HRT and other options as the first conversation to have with a doctor, nurse or pharmacist.

Maca tends to come up for three reasons:

  1. It is a food, so it feels gentler than a medicine.
  2. Traditional use links it to energy and fertility.
  3. Small studies report better scores for mood, anxiety and flushes.

The first two are reasons to be curious. Only the third is evidence, and it needs reading carefully.

What the studies actually found

The perimenopause pilot study

The study titled as a non-hormonal alternative to HRT in perimenopausal women tested pre-gelatinised maca in a small group of perimenopausal women. The reported results included lower blood pressure, lower depression scores and improvements in psychological symptoms such as anxiety.

The same paper did not consistently find changes in serum hormone levels such as oestradiol or FSH. In other words, women may have felt better without a measurable hormonal shift. That is why maca is described as an adaptogen, a plant thought to influence the stress and hormone signalling axis, rather than as a phytoestrogen that mimics oestrogen.

Postmenopausal trials

Two further studies looked at early postmenopausal women. One was a double-blind, placebo-controlled, multi-centre study with 168 participants. The other was a crossover trial with 34 women. Both used the same gelatinised organic maca. These are better designed than a simple before-and-after pilot, but they still involve small numbers and a single type of preparation.

The wider picture

A systematic review of clinical trials concluded that effectiveness for menopausal symptoms was limited, because of the sample sizes, the number of trials and their quality. Some summaries online say all trials were positive. That may be true of the handful that exist, but a small, consistent set of trials is not the same as strong proof.

ACOG’s Dr Nanette Santoro suggests a useful test for any supplement claim: look for randomised, placebo-controlled trials with at least 100 participants, and be wary of “clinically tested” used loosely. By that standard, maca has some promising signals but not a settled case.

Dose and timescale used in research

The research notes for this topic point to doses of 2,000 to 3,500 mg a day, with noticeable change reported after about 6 to 12 weeks of daily use. That is roughly one level teaspoon to one heaped teaspoon of powder, though spoon sizes vary, so weigh it if you want to be accurate.

Point What studies used What it means for you
Daily amount 2,000 to 3,500 mg Start at the low end and build up
Time to notice anything 6 to 12 weeks Judge after weeks, not days
Form Pre-gelatinised organic maca Check whether your powder is raw or gelatinised
Pattern Every day Not an as-needed remedy

These figures describe trial conditions, not a recommended prescription. A product label, pharmacist or GP is the right place to confirm an amount for you.

A practical way to test it

If you and your clinician are happy for you to try it:

  1. Note your main symptoms for two weeks first. A simple daily score out of ten for flushes, sleep and mood is enough.
  2. Start with a small amount, around half a teaspoon, with food.
  3. Keep it daily and change nothing else that matters, such as other supplements.
  4. Review at six and twelve weeks against your notes.
  5. Stop if you notice digestive upset, palpitations, headaches or anything unusual, and tell your GP.

Because symptoms in perimenopause rise and fall naturally, and placebo effects are real, your notes are the only fair way to tell whether maca did anything.

Who should speak to a clinician first

The NHS and ACOG both stress that herbal supplements are not regulated for safety, efficacy or purity. ACOG also warns that supplements can interact with medicines or health conditions, for example by affecting thyroid function or interfering with treatment for hormone-sensitive conditions.

Speak to your GP, practice nurse or pharmacist before starting maca if any of these apply:

  • You have a thyroid condition or take thyroid medication.
  • You have, or have had, a hormone-sensitive condition such as breast cancer, or you take treatment for one.
  • You are taking HRT, blood pressure medication or antidepressants.
  • Your periods are very heavy, very frequent or bleeding between periods. That needs assessing, not supplementing.
  • You are pregnant or trying to conceive. Perimenopause does not rule out pregnancy.

Also see a clinician if your symptoms are disrupting work, sleep or relationships. The NHS’s treatment page sets out that HRT and other regulated options are the route to discuss first. Maca should be an addition to that conversation, never a reason to skip it.

Maca next to other options

It helps to place maca on a ladder of evidence. At the top are regulated treatments such as HRT, prescribed after a conversation about your symptoms and history. Below those sit non-drug measures with better support: regular exercise, sleep habits, alcohol reduction and enough protein. Supplements come after that, and within supplements, the quality of evidence varies a great deal. A guide to menopause supplements and what the evidence says is a good way to see how preliminary findings differ from established treatment.

Evidence ladder for menopause treatment options

Food-based approaches are a sensible companion. Our own articles cover protein in menopause, ancient grains for menopause wellness, gentle teas for perimenopause and turmeric for menopause.

Choosing a maca powder

Since nothing guarantees purity in this category, the label is your main tool. Look for:

  • A clear ingredient list. Maca and nothing else, or a named blend where each root is listed.
  • The form. Raw or gelatinised. Gelatinised is the type used in the main perimenopause research.
  • Organic certification. It reduces pesticide questions for a root grown in the field.
  • Colour or type. Yellow, red and black maca are sold separately or blended. Trials have not established that one colour is better for perimenopause.
  • Serving size in grams. So that you can work out your daily amount.
  • Honest claims. Be cautious of a label promising to “balance hormones”. The trials did not consistently show hormone levels changing.

How to take it: stir into porridge, a smoothie or overnight oats. The flavour is earthy and slightly malty, so it sits well with oats, cacao and nut butter. Start small, because the taste and digestion both take getting used to. Our menopause smoothie recipes show how to fit powders into a breakfast.

Our view

We sell food, and we treat maca as food. We stock an Organic 4 Root Maca Powder Blend for people who want to add the root to breakfasts and smoothies. We do not claim it treats perimenopause, and we would not ask you to take it in place of advice from your doctor.

Our view — overview diagram

Our approach is simple ingredients, clear labels and minimal processing. That is the standard we apply to maca too. If a product has a long ingredient list and a bold hormone claim, the label tells you more than the marketing does. If you choose maca, pair it with the basics that have better support: protein at each meal, fibre from whole grains, seeds and nuts, and regular movement.

We also think the honest message is the useful one. Small trials are encouraging enough to justify curiosity, and weak enough to justify caution. Keep notes, give it the weeks it needs, and bring the results to your clinician.

— Jarrod

Where to find it

The Organic 4 Root Maca Powder Blend is available on our site. To build a perimenopause-friendly breakfast around it, browse vegan protein powders, nut butters and ancient grain flours and flakes.

FAQ

Can maca help with perimenopause symptoms?

Some small trials report better mood, lower anxiety and fewer symptoms in perimenopausal and early postmenopausal women. A systematic review still judged the evidence limited. Treat it as an unproven option, and talk to a clinician about regulated treatments.

How much maca powder per day?

Research has used 2,000 to 3,500 mg a day of pre-gelatinised maca, taken for 6 to 12 weeks or more. That is a trial figure, not a personal recommendation. Check your product label and ask a pharmacist or GP, particularly if you take medication.

Does maca balance hormones?

Not in a way that has been shown. In the pilot study, symptoms improved without consistent changes in oestradiol or FSH. Maca is not a hormone replacement and should not be presented as one.

Is maca safe to take with HRT or other medicines?

There is no regulation guaranteeing safety or purity for herbal supplements, and ACOG warns of possible interactions with medicines and conditions. Ask your GP, nurse or pharmacist before combining maca with HRT, thyroid medication or treatment for a hormone-sensitive condition.

Sources

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