PERU

Maca is sold as a natural hormone booster for energy, libido, and menopause.
In the trials, it barely moved anyone's hormones at all.

Maca  ·  Lepidium meyenii  ·  Mechanism: non-hormonal (macamides)

Maca is the root of a small, hardy, cabbage-family plant, Lepidium meyenii, grown high on the windswept plateaus of the central Peruvian Andes, above thirteen thousand feet where frost is common and almost no other crop survives. Andean communities have cultivated and eaten it for centuries, valuing it for stamina, fertility, and sheer endurance in one of the harshest farmed climates on earth.

The fresh root is first dried in the thin mountain sun, then boiled into porridge, brewed as a warm drink, or ground into flour, the way it has been prepared for many generations. That drying step is far from incidental, since it is precisely when some of the plant's most distinctive compounds actually form in it.

In the Andes maca was a food first, eaten in real quantity as a staple, and a remedy only second. Its reputation for boosting vigor and fertility is genuinely old, rooted in centuries of daily use rather than in any modern laboratory or clinical trial.

That old reputation is exactly what the global supplement trade seized on and amplified. Somewhere along the way a hardy Andean vegetable, eaten as dinner for centuries, was repackaged as a hormone-balancing pill sold worldwide.

Here is the catch the marketing tends to skip over. Maca contains no hormones of its own and does not appear to act like them, and in the trials that actually measured, taking it did not change blood levels of estrogen, testosterone, or the pituitary hormones that steer them, a finding replicated more than once.

What it does contain are unusual compounds called macamides, fatty-acid molecules that form as the root dries in the Andean sun, and whose effects in the body are still not well understood. The human evidence for its famous uses is thin: a handful of small, low-quality trials hint that maca may lift sexual desire and ease some menopausal symptoms, while others show nothing, and reviewers keep concluding that the results are genuinely inconclusive.

The label sells hormones. The bloodwork shows none moved.

So the fair verdict is a genuine, nutritious Andean food with a plausible but still unproven effect on libido and mood, and a mechanism no one has yet pinned down. If it helps you, it is not doing so by rebalancing your hormones, whatever the bottle claims, and it is no substitute for the treatments that address the menopausal changes real hormones drive after menopause.

The how-to

If you try it, do so as a food with a maybe attached, and drop the hormone story entirely.

Maca is sold as a powder or in capsules at most health stores and online, ideally the gelatinized, or cooked, powder, which digests more easily than raw, for roughly fifteen to twenty-five dollars a bag. The colored types, yellow, red, and black, are marketed for different purposes, but the human evidence does not really support choosing one over another.
A common amount in the trials was about one and a half to three grams a day, stirred into a smoothie, oatmeal, or coffee, where its malty, slightly earthy taste blends in. Give any trial of it several weeks, and judge it by how you actually feel, not by a promised hormonal shift.
Expect at most a subtle lift in energy or desire that may or may not arrive, since the trials are split. It will not change your hormone levels, so it is not a stand-in for menopausal hormone therapy or a fertility treatment.
Maca is a food and generally safe, though raw powder can cause bloating, so the cooked form is gentler. Because it is a cruciferous plant containing goitrogens, eat it cooked and mention it to your doctor if you have a thyroid condition, and skip high-dose supplements in pregnancy without medical advice.

Tomorrow: New Zealand and the green-lipped mussel
a Māori coastal food, now studied for the aching joints of osteoarthritis.

See you then.