Maca · Lepidium meyenii

玛咖 · Maca

Place · Level 3

秘鲁安第斯十字花科根茎 (不是人参) · 天然睾酮、激素平衡营销 · 但独立团队的 RCT 没有一项测到血清性激素变化 · 主观性欲、情绪有弱信号, 机制未知 · 全部人体证据小 + 短 · 最正面的几项集中在秘鲁同一个课题组

What it is · an Andean root + the 'Peruvian ginseng' tag

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它是什么 · 安第斯根茎 + 秘鲁人参标签

Maca = the swollen root-stem of Lepidium meyenii:

Latin name Lepidium meyenii Walp., family Brassicaceae — the same family as broccoli / cabbage / radishNot a ginseng: 'Peruvian ginseng' is pure marketing. Real ginseng is *Panax* (family Araliaceae) and is botanically unrelated to macaThe edible part is the hypocotyl (a swollen root-stem), not a true rootGrown almost entirely on the Junín plateau of central Peru, ~4000–4500 m — surviving intense UV, cold, and poor soilsIn the Andes it was a food staple long before it was a supplement — traditional uses center on energy / stamina / fertility / tolerating the harsh high-altitude environment
The color phenotypes are real, but 'black maca for the brain, red maca for the prostate' is mostly rodent data:

Yellow maca — most common / most commercialRed maca — reduced testosterone-induced prostate enlargement in rat models (Gasco 2007)Black maca — improved memory in ovariectomized female mice (Rubio 2011). Note: the 'black maca boosts sperm' line often attached to this citation is not from this study — it used no male animals and measured no reproductive endpointThe honest caveat: these color differences come almost entirely from rodent experiments and are not established in humans. Be wary of 'black maca specifically for the brain' sold as a human fact
Active compounds (maca's chemical fingerprint):

Macamides + macaenes — fatty-acid amides largely unique to maca; macamides structurally resemble the endocannabinoid anandamide and are hypothesized (not proven) to act as neuromodulatorsGlucosinolates / isothiocyanates — the cruciferous signature, the source of the pungent flavor and the thyroid / goitrogen discussion belowSterols + alkaloids (macaridine / β-carbolines / imidazole alkaloids, etc.)
Hold onto this one line, because every later judgment flows from it: maca has no known phytoestrogen and no established direct androgen-receptor agonism. How it actually works — if it works — is, to this day, unknown.

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Educational content, not medical advice — consult a clinician.

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