Macamides (N-Benzyl Fatty Acid Amides · Maca Bioactives · Endocannabinoid-Related Lipids)
| CAS No. | Compound class — no single registry CAS. Representative members: N-Benzyl-9Z-octadecenamide (N-benzyl oleamide, CAS 16239-37-5); N-Benzyl-9Z,12Z-octadecadienamide (N-benzyl linoleamide, CAS 71673-21-7) |
| Class | Fatty Acid Amide · N-Benzyl Alkylamide · Endocannabinoid-related Lipid Amide |
| Source | Lepidium meyenii (Maca) — hypocotyl (dried root/tuber, the edible storage organ) |
| Claim strength | Moderate |
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Lepidium meyenii — maca, or Peruvian ginseng — is a cruciferous plant native to the high Andes of Peru and Bolivia, cultivated at elevations between 3,800 and 4,800 metres above sea level — one of the highest-altitude food crops in the world. Archaeological evidence places maca cultivation in the Junín plateau of Peru at over 2,000 years ago, and the Inca empire incorporated maca into both food supply and ritual practice. Inca warriors are said to have consumed maca before battle to enhance strength and endurance, with consumption then restricted to prevent excessive sexual aggression — an ethnobotanical account that anticipates the modern evidence for both physical performance and libido effects. In Andean folk medicine, maca hypocotyl was used for fertility in both humans and livestock, for fatigue and altitude sickness adaptation, and as a general nutritive tonic. Spanish chroniclers documented its use in the 16th century, noting that indigenous populations prized it as a food and medicine of exceptional vitality-enhancing properties. The hypocotyl is traditionally sun-dried after harvest — a process that concentrates macamides and activates the enzymatic conversion of glucosinolate precursors — and consumed as porridge, fermented chicha drink, or in its dried form. The N-benzyl fatty acid amides now identified as macamides are the primary bioactive fraction formed during this traditional drying and processing, providing a molecular explanation for effects that Andean populations documented and transmitted across two millennia.
Macamides are a family of N-benzyl fatty acid amides unique to Lepidium meyenii. Structurally, macamides are formed by amide linkage between benzylamine and a long-chain unsaturated fatty acid (predominantly oleic, linoleic, and palmitoleic acid variants). This structure makes macamides partial inhibitors of fatty acid amide hydrolase (FAAH) — the enzyme that degrades anandamide (the endogenous cannabinoid) — currently the leading pharmacological explanation for maca's adaptogenic and libido-supporting effects. Commercial maca extract is typically characterised by macamide content alongside glucosinolate and total alkaloid profiles; macamide standardisation (0.6–1.0% macamides) is the emerging quality specification for premium extract grades.
Macamides for Libido, Energy, Endurance & Hormonal Balance — Evidence
Libido and sexual function — best-evidenced application: Multiple RCTs in both men and women document improvements in self-reported sexual desire, satisfaction, and function with daily maca extract supplementation at 1.5–3g per day over 6–12 weeks. Crucially, these effects occur without measurable changes in serum testosterone or oestrogen in most trials — consistent with the FAAH-inhibition mechanism (anandamide modulation) rather than a direct androgenic or oestrogenic mechanism. This distinction is important for label compliance: maca supports libido and sexual wellness without making testosterone claims that require more direct endocrine evidence. Claim strength: Moderate–High.
Physical energy and endurance: Controlled studies in trained cyclists document improved time-trial performance and self-reported energy levels after 14 days of maca extract supplementation. The energy benefit is consistent across studies and is mechanistically linked to macamide activity on endocannabinoid tone rather than stimulant pathways — making maca a clean-label energy ingredient compatible with non-stimulant positioning. Claim strength: Moderate.
Menopausal symptom relief: Several RCTs document reductions in menopausal symptom scores (Greene Climacteric Scale) — hot flushes, night sweats, mood disturbance — with standardised maca extract. Unlike shatavari, the effect does not appear to be oestrogen-mediated, making maca a complement to or alternative for women who prefer to avoid phytoestrogenic ingredients. Claim strength: Moderate.
Mood and psychological wellbeing: Preliminary clinical data from trials in postmenopausal women and healthy adults shows reductions in anxiety and depression scores (HADS, Beck scales) with daily maca supplementation. Effect sizes are modest but consistent with the broader adaptogenic positioning. Claim strength: Emerging–Moderate.
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Macamides Dosage, Ecotype Selection & Formulator Specification
Clinically referenced dose: 1,500–3,000mg of dried maca hypocotyl equivalent per day, most commonly as 500mg–1,500mg of concentrated extract (3:1 to 10:1 ratio). The extract ratio matters: a 10:1 extract at 300mg delivers the equivalent of 3g of whole maca powder and aligns with the lower end of clinical trial doses. Label macamide content where possible — emerging category standard for premium extract is 0.6–1.0% macamides by HPLC.
Ecotype specification — yellow, red, and black maca: Lepidium meyenii is cultivated in three primary colour ecotypes with partially distinct compound profiles and application positioning. Yellow maca is the highest-volume commercial grade with the broadest evidence base. Black maca has specific evidence for male fertility (sperm count, motility) and endurance performance. Red maca has the most data for bone health and prostate-related endpoints. Most commercial maca extract is yellow or mixed-colour; for targeted formulations the ecotype should be specified on the CoA and confirmed with the supplier.
Gelatinisation — the processing distinction: Raw maca hypocotyl contains glucosinolates that can impair thyroid function at very high doses and produce GI discomfort. Traditional Andean preparation involves drying and slow-roasting the hypocotyl — gelatinisation is the commercial equivalent: a low-heat processing step that deactivates the glucosinolate enzyme system, improves digestibility, and concentrates macamides relative to raw material. Gelatinised maca extract is the appropriate specification for supplement formulation. Confirm gelatinisation on the CoA or product specification sheet.
Pairs with: Ashwagandha (energy and vitality stacks), Shatavari (women's hormonal balance formulations), Tribulus terrestris (male sexual health combinations), Zinc (male fertility and testosterone support blends), Rhodiola rosea (dual-adaptogen endurance and energy positioning).
Frequently Asked Questions — Macamides
Does maca increase testosterone?
The clinical trial evidence does not consistently support direct testosterone elevation from maca supplementation. Most RCTs showing libido and sexual function improvements report no statistically significant change in serum testosterone, LH, or FSH. The pharmacologically supported mechanism is FAAH inhibition — macamides slow the breakdown of anandamide, the endogenous cannabinoid involved in mood, motivation, and sexual arousal. Maca's effects on libido are real and clinically documented, but the mechanism is not testosterone-mediated. Label claims referencing testosterone are not supported by the current evidence base and should be avoided in regulated markets.
What is the difference between raw maca powder and gelatinised maca extract?
Raw maca powder is the ground dried hypocotyl in its unprocessed state — high fibre content, relatively low macamide concentration, and active glucosinolate enzyme system that can cause GI discomfort in some users. Gelatinised maca extract uses low-heat processing to deactivate the glucosinolate system, improve GI tolerability, and concentrate the macamide fraction. For supplement capsule and tablet formulations, gelatinised extract is the correct specification. Raw powder is appropriate for food and beverage applications where the full plant matrix (flavour, texture, fibre) is desired.
What does ecotype mean for maca and does it matter for formulation?
Maca is cultivated in three primary colour ecotypes — yellow, red, and black — with partially distinct phytochemical profiles. Yellow maca has the broadest general evidence base and is the default commercial grade. Black maca has specific clinical data for sperm count improvement and endurance performance, making it the specified grade for male fertility and sports formulations. Red maca has the most evidence for bone health endpoints. For general wellness, energy, and libido positioning, yellow maca extract is the appropriate specification. For targeted applications, the ecotype must be confirmed on the CoA.
How does maca compare to ashwagandha and shatavari for energy and hormonal balance?
The three are mechanistically distinct and commercially complementary rather than interchangeable. Ashwagandha (withanolides) operates primarily via HPA axis modulation and cortisol reduction — making it the strongest evidence-based choice for stress-driven fatigue and cognitive support. Shatavari (shatavarins) operates via phytoestrogenic pathways — best positioned for female reproductive and lactation support. Maca (macamides) operates via endocannabinoid tone modulation — best positioned for libido, non-stimulant energy, and hormonal symptom relief without direct oestrogen or testosterone pathway involvement. The three are routinely combined in comprehensive adaptogen formulations targeting women's wellness.
Claim-strength scale – High = multiple human studies; Moderate = a few trials; Emerging = early lab data.
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