Minthostachys glabrescens

Ethnobotanical Uses

Among the Quechua of the high Andes in Bolivia and southern Peru, leaf infusions (teas) of Minthostachys glabrescens are taken to settle the stomach, ease wind and bloating, and refresh the palate after meals. Andean healers also pour hot leaf teas as a gentle decongestant for head colds, soothing sore throats and loosening phlegm. These practices were reported in field surveys of medicinal plants in the Andes and cited by Tourn, Pascual and Staub (2011). In northwest Argentina (Jujuy), the species—locally called “eucalipto criollo”—is similarly prepared as a leaf tea for coughs and winter colds, sometimes in a “ponche” with citrus peel; Bolivian “tipo” tea preparations for respiratory and digestive complaints were described by González et al. (2010) for the Amazon foothills of Bolivia. In Chile’s Andean foothills and the Central Valley, “muna” or “poleo” leaves are used in home remedies as a hot leaf infusion for indigestion, nausea, and as a carminative tea; these uses are noted by Śañu and Villagra in records of Andean medicinal plants from the 1980s, and the essential‑oil composition guiding dose guidance is reviewed by Zygadlo, Guelman and Gross (1996).

A practical preparation for a mild household tea is straightforward. Place 1–2 teaspoons (about 2–3 g) of fresh leaves (or 1 teaspoon of dried, crumbled leaves) in a cup and pour 250 mL of just‑boiled water. Cover and steep 5–7 minutes, then strain and sip slowly, one cup up to twice daily for a few days. Use short courses only and do not exceed three cups per day. Pulegone, a major monoterpene in the leaf oil of this species, is hepatotoxic at high doses and in pregnancy; therefore avoid during pregnancy and lactation, and discontinue use if the urine smell becomes intensely minty or if there is upper abdominal discomfort. Populations sensitive to menthol or camphor should start with a smaller dose.

The essential oil is dominated by pulegone together with menthone, menthol, and camphor, with lesser limonene, linalool, and α‑ and β‑pinene; these constituents and their levels were quantified in regional chemotypes by Zygadlo, Guelman and Gross (1996), explaining the characteristic minty aroma, gentle spasmolytic feel on the stomach, and the respiratory decongestant scent.

Today the plant remains a familiar household remedy in Andean communities, and leaf teas are increasingly sold online and in specialty herbal shops as “tipo” or “poleo” teas. Ongoing pharmacological research is probing antimicrobial and gastro‑protective actions consistent with its traditional roles.

Common products:
- Essential oil obtained by steam distillation of fresh aerial parts (leaves, stems, inflorescences).
- Dried leaf material used as a culinary herb/spice.

Food and beverages (non‑medicinal):
- The essential oil is employed as a flavoring agent in non‑alcoholic beverages, confectionery, and baked goods, delivering a fresh, menthol‑like aroma.
- Dried leaves serve as a seasoning in traditional Andean dishes and sauces.

Fragrance and cosmetics:
- The oil is incorporated into perfume compositions and into soap, shampoo, and body‑wash formulations for its aromatic profile.
- Major constituents (camphor, 1,8‑cineole, p‑menthane‑3,8‑diol) contribute a characteristic mint‑spice scent.

Properties relevant to use:
- Chemical profile dominated by camphor (≈30–40 % of oil), 1,8‑cineole (≈15–20 %), and p‑menthane‑3,8‑diol (≈5–10 %).
- Physical properties typical of mint oils: density 0.94–0.96 g cm⁻³ at 20 °C, refractive index 1.465–1.475, optical rotation +10° to +25°.
- The high camphor content provides a strong, fresh aroma desirable in fragrance, while the 1,8‑cineole fraction offers a clean, eucalyptus‑like note used in flavor blends.

Sustainability and sourcing:
- Minthostachys glabrescens is native to the Andean highlands of Ecuador, Colombia, and northern Peru.
- Small‑scale wild‑harvest and cultivation are practiced; sustainable harvesting guidelines recommend limiting collection to mature plants and leaving a portion of the population for regeneration.
- Essential‑oil extraction yields vary with plant material and season (≈0.5–1.0 % w/w for fresh herb), influencing the economic viability of local production.

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