Orchis latifolia

Orchis latifolia L. (Salabmisri / Salep Orchid): A Comprehensive Reference

1. Identity and Botanical Classification

1.1 Nomenclature and Taxonomy

Orchis latifolia Linn. (family Orchidaceae) is an important medicinal plant found between the Western Himalaya and Kashmir at altitudes of 3,000 to 4,000 m. The name Orchis latifolia L. was the original Linnaean binomial; modern botanical taxonomy, as reflected in the Royal Botanic Gardens Kew's World Checklist of Vascular Plants, has transferred much of the material formerly placed under this name to one or more species within the genus Dactylorhiza. According to the World Checklist of Monocotyledons (Govaerts 2003), the name Orchis latifolia L. is cited as a synonym of Dactylorhiza incarnata subsp. incarnata. A separate authority, the same checklist also places Orchis latifolia Scop. as a synonym of Dactylorhiza majalis. A further recombination, Dactylorhiza latifolia (L.) H.Baumann & Künkele, was published in Mitteilungsbl. Arbeitskreis Heimische Orchid. Baden-Württemberg 15(4): 444 in 1983.

In practice, the name Orchis latifolia Linn. persists extensively in the Ayurvedic and Unani pharmacopoeial literature, and in much of the phytochemical and ethnopharmacological research from the Indian subcontinent, as the accepted name for the species known in trade as Salabmisri. Closely related species traded under the same names — including Dactylorhiza hatagirea (D.Don) Soó — are often used interchangeably in the same medical systems, and published research frequently involves both taxa in association with the "Orchis latifolia" or "Salam mishri" label. In India, many plants share the common name "Salam mishri," which creates considerable controversy and confusion. The reader should note this taxonomic complexity when evaluating the literature.

1.2 Common and Vernacular Names

Orchis latifolia Linn. is a terrestrial herb commonly known as "Salep" in the English language. It is commonly known in Hindi/Urdu as Panja, Salam-Panja, Hath-Panja, or Hatajari, names derived from the hand-like morphology of its roots. Additional vernacular names in use include Salabmisri and Salab Misri (Urdu/Hindi); Munjatak (Sanskrit); and Adam and Eve Root (in certain Western folk traditions). In Arabic, it is referred to by names related to the term "Salep." The plant is distributed across India (Jammu and Kashmir, Sikkim, Arunachal Pradesh, Uttarakhand, and Himachal Pradesh), Pakistan, Afghanistan, Nepal, Tibet, and Bhutan.

1.3 Botanical Description and Natural Source

The plant is a perennial herb, up to 60–70 cm in height, with palmately lobed, fleshy, tuberous divided root tubers, and many erect, oblong, broadly lanceolate leaves. The appearance of the root is like a palm with fingers. The plant is found in the Himalayas at altitudes of 2,500–5,000 m in damp places, bears purple flowers, and has fleshy tuberous roots. It is cultivated in Europe, India, and South Asia. Fresh root tubers give a seminal smell.

1.4 Common Preparations and Dosage Forms

The harvested orchid tubers are boiled in water, milk, or yogurt to inactivate the enzymes they contain, then dried and ground into powder. This powdered product is used either in the preparation of the beverage known as salep or as a stabilizer and emulsifier in various food products. It also functions as a thickening agent in ice cream, cakes, cookies, and various beverages.

The primary preparations documented in traditional use and research literature include:

• Salep powder (churna/flour): Ground dried tubers, the most basic form.
• Salep beverage: Salep, derived from grinding the tubers of select orchid genera, finds application in traditional beverages, ice creams, and medicinal formulations.
• Milk decoction: The dried and ground root powder is traditionally taken with milk to increase vigor.
• Aqueous extract: Used in pharmacological research; lyophilized aqueous extracts of roots have been characterized using HPTLC, HPLC, and LC-MS analysis, and used in experimental studies of sexual behavior and androgenic potential.
• Polysaccharide-rich fraction: Aqueous extracts rich in fructooligosaccharides (FOS) and phytosterols have been evaluated in experimental pharmacology.

2. Traditional and Historical Use

2.1 Unani Medicine

It is an important medicinal plant used in clinical practice in the Unani system of medicine, where it is considered one of the herbs effective in promoting sexual health. In some magical traditions, its root is called Adam and Eve Root. It is considered an aphrodisiac and nervine tonic by Unani physicians.

2.2 Ayurveda

It is used as an aphrodisiac drug since ancient times in the Unani and Ayurveda systems of medicine, and is considered one of the herbs effective in promoting sexual health. Its demulcent action allays gastrointestinal irritation, and its nutritive and restorative function promotes rejuvenation during the convalescent period in patients suffering from chronic diarrhoea and bilious fevers. In Ayurveda, Siddha, Unani, and folk medicine, it is used in curing disorders of the circulatory, respiratory, nervous, digestive, skeletal, and reproductive systems, besides boosting the immune system to fight infectious diseases.

The roots are traditionally used to cure dysentery, diarrhea, chronic fever, cough, stomachache, wounds, cuts, burns, fractures, and general weakness.

The roots are described as cooling, emollient, aphrodisiac, rejuvenating, and tonic.

2.3 Vajikaran (Rasayana) Tradition

Orchis latifolia is used in the Ayurvedic specialty of Vajikaran, which deals with herbs possessing rejuvenative and revitalizing properties for improving sexual dynamics. The Indian traditional system also reports the pharmacological uses of orchid species, including Orchis latifolia, in Ayurveda. Salabmisri has been noted as playing a major role as a nutraceutical supplement in geriatric patients, and this orchid is considered useful in aged patients because of its high nutritive value.

2.4 Anatolian and Eastern Mediterranean Traditions

The historical use of salep orchids in Anatolia spans treatments for malaria, arthritis, dysentery, cough, headache, and wounds. In traditional medicine, salep has been prescribed for treating glottal inflammations and intestinal disorders, tuberculosis, diarrhea, Parkinson's disease, cancer, and fever, and is especially used to strengthen sexual activity, as an erectile dysfunction therapy, for physical strength enhancement, and to increase vigor.

It is hard to say when and where salep originated, but historical evidence suggests ancient Greeks and Romans consumed a similar beverage. The Greek physician Dioscorides described the medical properties of orchid roots in his first-century treatise De Materia Medica. In Epirus, Greece, orchids have been traditionally harvested for the production of salep, a beverage made from their tubers.

2.5 Use in India: The "Munjatak" Preparation

The underground tuber of Orchis latifolia is used in the drug "munjatak," a preparation known for pacifying cough.

2.6 Traditional Preparation Method

The demulcent action of the tuber allays gastrointestinal irritation, and its nutritive and restorative function promotes rejuvenation during the convalescent period in patients suffering from chronic diarrhoea and bilious fevers. It has been widely used in the treatment of syphilis, diarrhoea, strangury, hemiplegia, dyspepsia, tuberculosis, debility, and helminthiasis. Glucomannan, a key constituent, gives consistency to the salep drink as a hot beverage, and gives hardness and late-melting properties to Maraş-type ice cream.

3. Key Constituents and Active Compounds

3.1 Primary Carbohydrate Constituents

The main components of salep tubers are glucomannan and starch, both of which are carbohydrate derivatives. Although the composition varies depending on the harvest season and orchid species, salep typically contains approximately 48% mucilage, 1% sugar, 3% starch, and 5% nitrogenous substances. Salep powder has attracted tremendous research interest due to its unique functional features and nutritional value in food and medical formulations. Glucomannan is the major constituent of salep powder.

The root tubers are rich in starch, mucilage, sugar, phosphate, chloride, and the glucoside loroglossin.

3.2 Phenolic and Other Secondary Metabolites

Chemical constituents include phenolic acids, tannins, flavonoids, coumarins, and terpenoids. Besides glucomannan and starch, salep contains different compounds such as nitrogenous substances, proteins, particularly calcium, potassium, iron, chlorides, phosphates, and some trace levels of volatile oils, ferulic acid, quercetin, daucosterol, cirsilineol, and sterols.

Two phenanthrenes — loroglossol and hircinol — have been isolated from orchid tubers. These compounds exhibited in vitro antioxidant and immunostimulatory activity, increasing the activity of superoxide dismutase (SOD), catalase (CAT), and glutathione S-transferase (GST) in polymorphonuclear leukocytes; they also have antimicrobial properties demonstrated by tests with Escherichia coli and Staphylococcus aureus, and anti-proliferative effects on gastric tumour cell lines by induction of apoptosis.

Among constituent phenolics, p-hydroxybenzoic acid, kaempferol, rosmarinic acid, and caffeic acid have been reported to be present.

For the closely related species Dactylorhiza hatagirea, secondary metabolites such as dactylorhins A–E and dactyloses A–B have been identified and exhibit a wide spectrum of pharmacological activities including antioxidant, antimicrobial, antiseptic, anticancer, and immune-enhancing activities.

3.3 Fructooligosaccharides (FOS)

Fructans and fructooligosaccharides (FOS), considered functional food components, have been reported to produce beneficial effects against streptozotocin-induced oxidative stress. The aqueous extract of Orchis latifolia, rich in FOS as well as phytosterols, has been evaluated for efficacy against streptozotocin- and alloxan-induced sexual dysfunction.

3.4 Proposed Mechanisms of Action

Several mechanisms have been proposed or investigated, predominantly in preclinical models:

• Demulcent/mucoprotective: The mucus-like substance (mucilage) in salep may help soothe the digestive tract.
• Androgenic/pro-testosterone: A dose-dependent effect was observed in animal studies, with the highest effect at 200 mg/kg body weight administration of lyophilized extract, showing a pronounced anabolic and spermatogenic effect evidenced by weight gains in the body and reproductive organs, and significantly increased serum testosterone and nitrous oxide levels.
• Antioxidant: The phenanthrene compounds loroglossol and hircinol increase the activity of antioxidant enzymes SOD, CAT, and GST in immune cells in vitro.
• Prebiotic/gut-modulating: Glucomannan is a naturally occurring polysaccharide that has been widely applied to lower body weight and circulating cholesterol, and to treat constipation, diabetes, and arterial sclerosis.
• Antihypertensive/vasorelaxant: In the related species Orchis mascula, the crude extract significantly reduced systolic blood pressure in spontaneously hypertensive rats and improved endothelial dysfunction by increasing acetylcholine-induced relaxation.

4. Scientific Evidence by Area of Use

4.1 Reproductive Health, Aphrodisiac, and Androgenic Effects

This is the area with the largest body of direct experimental research on Orchis latifolia itself, though all such research remains at the animal (preclinical) level. No published randomized clinical trials in humans were identified specifically for Orchis latifolia.

Key animal study — androgenic and aphrodisiac activity (Bhargava, Thakur, Patil & Dixit, 2009): The bulbous rhizomes of Orchis latifolia are used traditionally in the Indian subcontinent, especially in the northern region and Nepal, as an aphrodisiac and sexual stimulant. Lyophilized aqueous extract of roots was characterized using HPTLC, HPLC, and LC-MS analysis and then used to study the effect of oral administration on sexual behavior, androgenic potential, and spermatogenesis in male Wistar albino rats. A dose-dependent effect was observed, with the highest effect at 200 mg/kg body weight administration. There was a pronounced anabolic and spermatogenic effect in treated animals (p < 0.05) as evidenced by weight gains in the body and reproductive organs; serum testosterone levels as well as nitrous oxide levels were significantly increased. Treatment markedly affected sexual behavior, reflected in reduction of mount latency, ejaculation latency, post-ejaculatory latency, and intromission latency, and an increase in mount frequency and attraction towards female (p < 0.05). Furthermore, a pronounced improvement in spermatogenesis was observable by histological examination of testicular tissues. The present study thus validates the Ayurvedic claims of denoting O. latifolia as an aphrodisiac.

Additional rat studies regarding nitric oxide: Data specific to Orchis latifolia and testosterone have shown dose-dependent effects. An evaluation of the effects of Orchis latifolia in male albino rats notes a significant increase in serum testosterone post-treatment, with the greatest effects observed at a dose of 200 mg/kg body weight, providing concomitant increases in body mass, reproductive organ mass, and sexual behavior. Improvements in spermatogenesis were also noted via histological examination of testicular tissues.

Hyperglycemia-induced sexual dysfunction study (Thakur & Dixit, 2008): Diabetes mellitus has been implicated for deleterious effects on male reproductive function, possibly due to increased oxidative stress. Fructooligosaccharides have been reported to produce beneficial effects against streptozotocin-induced oxidative stress. The aqueous extract of Orchis latifolia, rich in FOS and phytosterols, was evaluated for efficacy against streptozotocin- and alloxan-induced sexual dysfunction. Behavioral analysis of rats was undertaken to observe effects on mount, ejaculation, and intromission latencies and frequencies. It was observed that hyperglycemia had an adverse effect on overall sexual behavior, and the deleterious effect was significantly reduced in animals treated with the polysaccharide-rich fraction of O. latifolia.

Comparative Vajikaran herb study (Thakur et al., 2007): Lyophilized aqueous extracts of Asparagus racemosus, Chlorophytum borivilianum, Curculigo orchioides, Dactylorhiza hatagirea, and Orchis latifolia Linn. at 200 mg/kg body weight were administered orally to male Wistar albino rats to compare their effects on pendiculation activities and in vitro sperm count.

Evidence assessment: All identified studies on the aphrodisiac and androgenic activity of Orchis latifolia are animal (rodent) studies. No human clinical trials have been published. The evidence is therefore preliminary and cannot be directly extrapolated to human efficacy or safety.

4.2 Related Species: Dactylorhiza hatagirea Aphrodisiac Evidence

Because Dactylorhiza hatagirea is taxonomically and commercially closely associated with Orchis latifolia in South Asian medical systems, its evidence is frequently cited in the same literature.

Dactylorhiza hatagirea is considered an important aphrodisiac plant in Ayurvedic and Unani literature, and is employed to enhance performance as well as increase vigor and vitality. In extract-treated male rats, testosterone increased significantly. The mean levels of testosterone increased approximately to 9 ng/ml in the experienced males, and this increase was significantly larger (p < 0.05) than the enhancement observed in the control group. The results of studies undertaken suggest that the aqueous extract of D. hatagirea causes a significant anabolic effect comparable to testosterone treatment. Its use as a dietary supplement was found to be beneficial in increasing testosterone levels, resulting in improved sexual desire and arousal in preclinical models.

4.3 Gastrointestinal Uses

Due to its high glucomannan content, salep is used in traditional medicine. The tubers and glucomannan in salep are known for their antidiarrheal, wound-healing, antipyretic, cholesterol-lowering, blood sugar-reducing, liver-protective, antitussive, expectorant, respiratory-relieving, and tuberculosis-preventive effects.

People use salep for diarrhea, heartburn, gas, and indigestion, but there is no good scientific evidence to support these uses. The gastrointestinal uses are primarily supported by traditional reports and the known properties of the key constituent, glucomannan, which has its own body of research in other plant sources (notably konjac), rather than by clinical trials specifically on Orchis latifolia.

4.4 Antioxidant and Antimicrobial Effects

The phenanthrenes loroglossol and hircinol isolated from orchid tubers exhibited in vitro antioxidant and immunostimulatory activity, increasing the activity of SOD, CAT, and GST in polymorphonuclear leukocytes, as well as antimicrobial properties demonstrated by tests with E. coli and S. aureus, and anti-proliferative effects on gastric tumour cell lines by induction of apoptosis. A study by Avasthi, Ghosal, and Purkayastha (2013) on the antimicrobial activity of Orchis latifolia is cited in the related Orchis mascula literature; however, these results are in vitro and have not been confirmed in clinical trials. Extracts of related orchid species have demonstrated antioxidant and antimicrobial activities in both of these study types.

4.5 Cardiovascular and Hypolipidemic Effects

The closest available preclinical evidence for hypolipidemic and antihypertensive activity comes from studies on the closely related Orchis mascula. In normotensive anesthetized rats, the crude extract at 10 and 30 mg/kg caused a dose-dependent attenuation of mean arterial pressure. Orchis mascula also decreased serum triglycerides (p < 0.001), LDL-cholesterol (p < 0.05), and atherogenic index (p < 0.05). Several scientific studies have been carried out on Salabmisri for its medicinal properties including aphrodisiac, hypolipidemic, and antihypertensive properties. These findings remain in the preclinical domain only.

4.6 Glucomannan: Broader Evidence Base

The primary bioactive polysaccharide of Orchis latifolia — glucomannan — has an independent and more established evidence base when derived from other sources (most extensively studied from Amorphophallus konjac). Glucomannan, a naturally occurring polysaccharide existing in certain plant species and fungi, has been widely applied clinically to lower body weight and circulating cholesterol level, and to treat constipation, diabetes, and arterial sclerosis. Besides its role in gastroenterological and metabolic syndrome, its therapeutic effect in treating cancerous diseases has been appreciated by mounting research. However, extrapolating this evidence to Orchis latifolia-derived glucomannan requires caution, as source, molecular weight, degree of acetylation, and other structural features differ between species.

5. Body Systems and Health Areas

Based on the documented traditional use and the available — predominantly preclinical — scientific research, Orchis latifolia and the broader salep orchid group are associated with the following body systems and health areas:

• Reproductive and endocrine system: Traditional aphrodisiac use and preclinical evidence for testosterone elevation, spermatogenesis improvement, and sexual behavior modulation in rodents.
• Gastrointestinal system: Its demulcent action allays gastrointestinal irritation, and its nutritive and restorative function promotes rejuvenation during the convalescent period in patients with chronic diarrhoea and bilious fevers.
• Respiratory system: Traditional use as an expectorant and antitussive, and use in the preparation "munjatak" for cough.
• Nutritive/metabolic: Salabmisri has played a major role as a nutraceutical supplement in geriatric patients, as this orchid is considered useful in aged patients because of its high nutritive value.
• Cardiovascular system: Preclinical findings in related Orchis species for hypolipidemic and antihypertensive effects.
• Immune and antioxidant: In vitro findings for immunostimulatory and antioxidant activities of isolated phenanthrene compounds.
• Nervous system: Traditional Unani designation as a nervine tonic; Dactylorhiza hatagirea, the closely related species, finds use in folk medicine in curing disorders of the nervous system.

6. Dosage Forms and Reported Doses

The following dosages appear only as reported in the identified sources and should not be interpreted as established clinical recommendations.

• Animal (preclinical) dose — androgenic/aphrodisiac studies: A dose-dependent effect was observed with the highest effect at 200 mg/kg body weight administration of lyophilized extract in rats.
• Animal (preclinical) dose — comparative Vajikaran study: Lyophilized aqueous extracts at 200 mg/kg body weight were administered orally to male Wistar rats.
• Food/beverage form: It can take as many as 13 orchid bulbs to make one cup of salep beverage.
• Traditional powder form: In traditional Ayurvedic and Unani systems, the dried and ground root powder is taken with milk. No standardized human clinical dosage has been established in any regulatory pharmacopoeia identified in the available literature.

7. Safety Considerations and Relevant Interactions

7.1 Regulatory Safety Assessment

Salep is possibly safe when consumed in foods. There is not enough reliable information to know if salep is safe to use in larger amounts as a medicine. No comprehensive human safety data, controlled clinical safety studies, or established tolerable upper intake levels for Orchis latifolia preparations were identified in the peer-reviewed or institutional literature reviewed.

7.2 Taxonomic Adulteration and Identity Concerns

A major documented safety and quality concern is the widespread adulteration and misidentification of salep products. In India, many plants share the common name "Salam mishri," which creates considerable controversy and confusion. Detection of orchids in 43% of tested commercial samples is alarming, considering that all orchid species are CITES Appendix II listed and harvesting is illegal at a national level in the main source countries Greece, Iran, and Turkey. The current high demand has also resulted in the increasing use of substitutes, such as rice powder and carboxymethyl-cellulose (CMC), to meet market needs. This means that products marketed as Orchis latifolia or Salabmisri may contain different orchid species, non-orchid substitutes, or mixed material.

7.3 Conservation Status and Legal Considerations

All species of orchid used for salep are listed in Appendix II of CITES. Many terrestrial species within the Orchidaceae family are on the IUCN Red List of rare and endangered species, and some are at risk of extinction because of climate change, deforestation, land manipulation, tuber overexploitation, and illegal trade. Salep harvesting is considered a major factor threatening Turkey's diverse and unique orchid flora. During salep harvesting, new (daughter) tubers of orchids are removed mostly in their generative state, thereby destroying the affected individuals. Annual harvest volumes are estimated at 30–120 million tuberous orchids in Turkey. The CITES Secretariat has noted that the trade of orchid tubers is a threat to wild populations and that trade appears to be unregulated.

7.4 Known Drug Interactions

No specific drug interaction data for Orchis latifolia were identified in the peer-reviewed or regulatory literature reviewed. Proposed mechanisms — including effects on testosterone and nitric oxide levels — suggest theoretical interactions with hormone therapies and phosphodiesterase-5 inhibitors, but no interaction studies in humans have been published.

7.5 Populations of Concern

No formal human safety studies have been conducted in pregnant women, nursing mothers, children, or individuals with hormone-sensitive conditions. In the related species Orchis anatolica, histopathological effects on female fertility have been studied in rats, but these findings cannot be directly extrapolated to Orchis latifolia or to human populations.

8. Evidence Summary and Research Gaps

The overall evidence base for Orchis latifolia as a dietary supplement remains at an early stage. The strongest body of evidence is for the aphrodisiac and androgenic effects, all of which derive from animal studies — primarily in male Wistar and albino rats — using lyophilized aqueous or polysaccharide-rich fractions. Demonstrated effects include testosterone elevation, improvements in sexual behavior measures, and histological evidence of spermatogenesis stimulation, all at doses of 200 mg/kg body weight in rodents. These findings are consistent with traditional Ayurvedic and Unani claims, but no human randomized controlled trials have been conducted or identified. For gastrointestinal, cardiovascular, antioxidant, and other uses, the evidence is either entirely traditional in nature or derives from in vitro and animal studies on related taxa. The glucomannan constituent of salep has a more robust body of clinical evidence derived from other plant sources, but species-specific and extraction-specific data for Orchis latifolia glucomannan in humans are absent. Significant research gaps exist across all areas.

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