Supaveda · Ingredient Spotlight
Kulath
Macrotyloma uniflorum (Lam.) Verdc. — Horse Gram
Also known as: Kulattha · Kulthi · Gaheth · Gahat · Muthira · Ulavalu · Kollu · Hurali
Kulath (Macrotyloma uniflorum) is the most medically impressive legume you have probably never heard of. Cultivated on the Indian subcontinent since 2500 BC — predating many of the herbs in this series — it has been simultaneously a food, a medicine, and a survival crop for generations of Himalayan communities who understood intuitively what modern pharmacology is only now confirming.
Called the "poor man's pulse" for its extraordinary hardiness in drought, poor soils, and harsh climates where no other crop survives, Kulath is an ecological paradox: grown by people who cannot afford premium crops, yet richer in protein (22–24%) than many expensive legumes, and uniquely endowed with bioactive flavonoids and protein complexes with demonstrated activity against kidney stones, blood glucose, and lipid profiles. 12 The 2024 systematic review in Journal of Food Science (Wiley/PubMed) confirmed it as a genuine "superfood" whose nutraceutical potential is substantially underexplored relative to its therapeutic record. 1
The Forgotten Pulse — An Orphan Crop Deserving Rediscovery
Kulath is classified by food scientists as an "orphan crop" or "neglected legume" — a species with high nutritional and therapeutic value that has been largely bypassed by modern agricultural intensification, which has focused on a narrow range of commercially optimised crops. 2 Archaeological evidence places its cultivation in India from 2500 BC; it has been grown continuously across the Himalayan foothills, Western Ghats, and Deccan plateau ever since. The Charaka Samhita, Sushruta Samhita, and Ashtanga Hridayam all document its medical applications. The Himalayan populations who have used it as their primary pulse for millennia have lower recorded rates of kidney stone disease than the plains populations who switched away from it — a correlation now being investigated as more than coincidental. 1
At a Glance — Key Evidence-Backed Benefits
Traditional Ayurvedic Uses
In Ayurveda, Kulath (Kulattha) is classified as a Mutrala (diuretic), Ashmari Nashaka (kidney stone destroyer), and Kaphahara (Kapha-reducing) pulse — a food that is simultaneously a medicine. The Charaka Samhita specifically prescribes Kulattha as the foremost dietary therapy for Ashmari (urinary calculi/kidney stones) and as a daily food for those prone to urinary disorders — a 3,000-year dietary intervention that modern research has since validated. 3
Unlike most Ayurvedic medicines that are reserved for therapeutic use, Kulath is a Pathya Ahara — a therapeutic food specifically recommended as part of the daily diet for conditions including kidney stones, obesity, respiratory disorders, and diabetes. This food-medicine overlap is precisely what makes it interesting in the modern nutraceutical context: it is simultaneously a high-protein dietary staple and a source of bioactive compounds with direct metabolic and urinary effects. 3
Ayurvedic Properties (Guna)
Conditions Traditionally Treated
- Kidney and bladder stones (Ashmari) — the foremost classical indication; primary dietary therapy
- Urinary retention and dysuria — diuretic action promotes urine flow and clears urinary channels
- Obesity and excess fat tissue (Sthaulya) — Ruksha (drying) and Laghu (light) properties reduce excess Kapha-Meda
- Diabetes (Madhumeha) and poor blood sugar regulation
- Respiratory conditions — bronchitis, asthma, and congestion due to Kapha accumulation
- Piles (Arsha) and haemorrhoids — astringent action reduces bleeding and swelling
- Leucoderma (vitiligo) and skin conditions
- Heart diseases — traditional dietary support for cardiac health
- Menstrual irregularity — traditional use in regulating abnormal menstrual cycles
- Fever and inflammation — diuretic and anti-inflammatory properties used for various febrile conditions
The Nutritional Profile — Why This Pulse is Exceptional
One of Kulath's most compelling properties is nutritional: despite growing in conditions where other crops fail, it produces seeds with a protein content of 22–24% — comparable to or exceeding many premium legumes — alongside a unique combination of slow-digesting carbohydrates, dietary fibre, essential minerals, and bioactive phytochemicals that most pulse crops lack. 2
Kulath Seed Nutritional Profile (per 100g dry weight)
The slow digestibility of Kulath's carbohydrates is medically significant: its resistant starch fraction reduces the rate of glucose absorption from the gut — one of the mechanisms behind its antidiabetic activity. This is not a separate pharmacological property from its nutritional value; it is a direct consequence of its food composition. Kulath is genuinely a food that is its own medicine — the Ayurvedic concept of Pathya Ahara (therapeutic food) in its most direct expression. 1
Key Active Compounds
The bioactive phytochemistry of Kulath seeds is unusually diverse for a legume — encompassing phenolic acids, flavonoids, tannins, saponins, phytosterols, and anthocyanidins alongside the nutritionally relevant proteins, amino acids, and resistant starch. The 2024 systematic review confirmed that this combination of nutritive and bioactive compounds produces pharmacological effects spanning antidiabetic, anti-urolithiatic, anti-inflammatory, antioxidant, and hepatoprotective domains. 1
Primary Bioactive Constituents
The Kidney Stone Mechanism — Kulath's Strongest Application
Of all Kulath's confirmed properties, its anti-urolithiatic (kidney stone preventing/dissolving) activity is the most strongly and consistently supported by peer-reviewed evidence — and is the most directly connected to thousands of years of Himalayan folk practice in which kidney stone patients were prescribed Kulath water as their primary treatment. 4
Approximately 5% of the global population suffers from urolithiasis at some point in their lifetime, with calcium oxalate stones accounting for around 75% of all kidney stones. Current pharmaceutical management options (citrate supplementation, thiazide diuretics) have significant side effects; the appeal of a food-based preventive strategy with millennia of traditional use is self-evident. 4
Kulath's Four-Mechanism Antilithiatic Action
The DPP-4 Connection — Kulath and the Pharmaceutical Gliptin Pathway
🔬 Myricetin inhibits DPP-4 — the same enzyme targeted by sitagliptin and saxagliptin
One of the most pharmacologically interesting recent findings in Kulath research is the discovery that its primary flavonoid, myricetin, inhibits dipeptidyl peptidase-4 (DPP-4) — the enzyme that degrades GLP-1 (glucagon-like peptide-1), an incretin hormone that stimulates insulin secretion and reduces post-meal blood glucose. 5 DPP-4 inhibition is the mechanism of an entire pharmaceutical drug class — the gliptins (sitagliptin, saxagliptin, alogliptin) — that is now one of the standard treatment approaches for type 2 diabetes. Kulath's myricetin appears to act on the same pathway. This does not mean Kulath replaces pharmaceutical DPP-4 inhibitors — the degree of inhibition is not comparable — but it provides a genuinely mechanistic basis for Kulath's traditional antidiabetic use that connects it to current pharmaceutical pharmacology. The same mechanism is complemented by Kulath's α-amylase inhibitor protein (reduces glucose absorption) and phenolic acids (inhibit α-glucosidase) — giving it a three-way antidiabetic profile operating through distinct non-overlapping mechanisms. 1
What the Research Says
The PMC-indexed study by Patel and Acharya (2020, Heliyon, PMC7327257) is the most rigorously conducted animal model study of Kulath's antilithiatic activity. Aqueous extract of M. uniflorum seeds (AEMU) was evaluated in ethylene glycol-induced urolithiasis in Wistar rats at 400 and 800 mg/kg doses from day 15 to day 28. The treatment group showed statistically significant (p<0.001) increases in urine volume and calculus inhibitors (magnesium, citrate), and significant reductions in stone-promoting parameters (calcium, oxalate, uric acid, urea) compared to untreated controls. Kidney histopathology confirmed reduced renal cell damage and improved glomerular activity. 4 A separate PMC study (Gautam et al., 2020, PMC7443191) screened 20 Himalayan farmer varieties of Kulath for calcium oxalate crystal inhibition, finding the aqueous extract of Sundernagar seeds achieved 45% ± 1.2 inhibition in the nucleation assay — among the highest recorded for any plant tested under the same protocol. 6 The crystal dissolution experiments showed microscopic evidence of actual reduction in CaOx crystal size and dissolution of human kidney stone samples with Kulath seed extract treatment — a milestone result the authors described as potentially significant for the field of urolithiasis.
Kulath's antidiabetic properties have been characterised through multiple independent mechanisms. The foundational study by Gupta et al. (2011, PubMed PMID 21043992) purified an α-amylase inhibitor protein (MUAI) from Kulath seeds and characterised its kinetics: MUAI inhibits both mouse pancreatic α-amylase (Ki = 11 µM) and human salivary α-amylase (Ki = 8.8 µM) in a non-competitive manner, with IC₅₀ values of 30 and 12.5 µg/ml respectively. Crucially, in streptozotocin-nicotinamide-induced diabetic mice, MUAI significantly reduced serum glucose levels with minimum pathological changes in pancreas, kidney, and liver — confirming in vivo antidiabetic activity. 7 The DPP-4 inhibitory mechanism of myricetin was established by Lalitha et al. (2020, PLoS ONE) — confirming increased GLP-1 levels and insulin secretion through DPP-4 inhibition. 5 Additionally, raw Kulath seeds show stronger α-glucosidase and protein tyrosine phosphatase 1β (PTP1β) inhibitory activity than sprouted seeds, suggesting the raw seed form retains superior antidiabetic potency. The 2024 systematic review concluded that Kulath's multi-target antidiabetic profile — α-amylase inhibition, DPP-4 inhibition, and α-glucosidase inhibition — makes it an exceptionally well-mechanised food-based antidiabetic. 1
Kulath's lipid-modulating properties are supported by both its phytosterol content and its dietary fibre effects. β-Sitosterol and stigmasterol from Kulath seeds compete with dietary cholesterol for intestinal absorption through the same NPC1L1 transporter pathway — the mechanism by which dietary plant sterols reduce LDL cholesterol. 2 The 2024 systematic review (Sah et al., Natural Resources for Human Health) confirmed hypolipidaemic activity — specifically reduction of serum cholesterol and LDL alongside increased HDL — consistent with Kulath's traditional classification as a Kapha-reducing (Kaphahara) food that clears accumulated lipid deposits. 2 For weight management, Kulath's effects operate through several mechanisms: high protein content increases satiety and thermogenesis; resistant starch reduces glycaemic response and caloric density; and the anti-adipogenic metabolic effects of its flavonoids (particularly quercetin's inhibition of adipocyte differentiation) address fat cell formation directly. In SupaSlender, these properties complement Guggul's thyroid-stimulating metabolism enhancement and Triphala's gut microbiome modulation for a comprehensive, multi-mechanism metabolic formula.
Ramalingam et al. (2020, Combinatorial Chemistry & High Throughput Screening) specifically investigated the anti-inflammatory activity of Kulath's bioflavonoids through COX enzyme inhibition — the same mechanism as ibuprofen, naproxen, and other NSAIDs. The study confirmed that Kulath's flavonoids, particularly myricetin, quercetin, and kaempferol, inhibit both COX-1 and COX-2 enzymes — providing anti-inflammatory and analgesic activity through the prostaglandin synthesis pathway. 8 Separate carrageenan-induced paw oedema studies in rats confirmed significant anti-inflammatory activity with both aqueous and ethanolic Kulath leaf extracts, validating the classical Ayurvedic use of Kulath for inflammatory conditions and fever. The anti-inflammatory activity is particularly relevant to the kidney stone context: urolithiasis causes significant renal inflammation as crystals damage tubular epithelium, and Kulath's anti-inflammatory action complements its direct antilithiatic properties by also reducing the inflammatory tissue damage that crystals cause. 4
Mathaiyan et al. (2022, NeuroQuantology) confirmed liver-protective effects of aqueous Kulath seed extract in alcohol-induced liver damage in rats — finding significant protection against hepatocellular damage markers (AST, ALT) and restoration of liver architecture on histopathology. 9 A 2023 study in Indian Journal of Traditional Knowledge (Sudheer et al.) further demonstrated kidney protection from cisplatin-induced nephrotoxicity in albino rats treated with Kulath — finding significant reduction in renal damage markers and improved kidney function. 9 This kidney-protective effect against a pharmaceutical toxin is clinically relevant: cisplatin is a widely used chemotherapy agent that causes nephrotoxicity as a major side effect. The renal-protective mechanism aligns perfectly with the classical Ayurvedic classification of Kulath as a kidney-strengthening herb — combining direct antilithiatic activity (preventing stone formation) with kidney tissue-protective activity (preventing nephrotoxic damage). 3
The 2024 systematic review confirms that Kulath's traditional use for bronchitis, asthma, and respiratory congestion is pharmacologically plausible through its anti-inflammatory and Kapha-reducing properties — the dense Kapha accumulation in the respiratory tract that Ayurveda identifies as the root of chronic respiratory disease is addressed by Kulath's drying, heating (Ushna) and Kapha-reducing classification. 1 Antimicrobial activity of Kulath against Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa has been confirmed in multiple in vitro studies — supporting its traditional use in throat infections, fever, and cough. The cooked Kulath broth is traditionally taken warm with spices specifically for cold, throat infection, and fever — the soup form is described as "generating heat" in the body — an observation consistent with its Ushna Veerya (heating potency) classification and antimicrobial activity. 1 Antidiarrhoeal activity has also been documented, consistent with the astringent (Kashaya) taste in Ayurvedic pharmacology.
Traditional Use & Modern Dosage
Kulath has the great advantage of being a food as well as a medicine — it can be consumed as a regular dietary staple and its therapeutic benefits accrue from consistent dietary inclusion. The classical Ayurvedic preparations specifically for kidney stones use the soaking water or a decoction; for metabolic and antidiabetic use, regular consumption as a cooked pulse is the primary approach.
| Form | Traditional Preparation | Primary Use |
|---|---|---|
| Soaking Water (Kulathambhu) | 30–50g Kulath seeds soaked in 500ml water overnight; the soaking water is drunk in the morning — the classical kidney stone remedy that Himalayan communities have used for millennia | Kidney stone prevention and dissolution; urinary health; this form maximises the diuretic flushing and crystal inhibitor protein action |
| Decoction (Kwath) | Seeds boiled in water until volume reduces by half; strained and drunk warm | Kidney stones, bronchitis, asthma, respiratory conditions; 30–60 ml twice daily |
| Cooked Dal / Soup | Prepared as a lentil soup with traditional spices (particularly ginger and cumin); the everyday food-medicine preparation | General metabolic health, blood sugar management, cholesterol, weight management — daily dietary inclusion |
| Powder (Churna) | Roasted seed powder taken with warm water or included in food preparations | Concentrated therapeutic use; 5–10g/day in warm water before meals for antidiabetic and lipid effects |
| Capsule Blend (SupaSlender) | Kulath combined with Guggul and Triphala in SupaSlender; standardised daily dose | Metabolism, weight management, blood glucose and lipid support — as directed on product |
For kidney stone prevention, the soaking water is the most traditional and practically convenient form — it requires no special preparation and can be incorporated as a daily morning ritual. Himalayan populations who use Kulath regularly report it as part of an everyday dietary pattern rather than a medicinal intervention, which is precisely the Pathya Ahara (therapeutic food) concept in practice.
Supaveda Products with Kulath
Kulath features in SupaSlender — where it brings the blood glucose, lipid, and metabolic dimensions to Guggul's thyroid-metabolic action and Triphala's gut-microbiome modulation:
Kulath is the blood glucose and lipid management herb of the SupaSlender formula — bringing its α-amylase inhibition, DPP-4 inhibitory myricetin, α-glucosidase inhibition, and phytosterol-driven LDL-lowering to the formula. Guggul provides the thyroid-stimulating and Lekhaniya (fat-scraping) metabolic engine through FXR antagonism and T3 upregulation. Triphala supports the gut microbiome, digestive detoxification, and metabolic substrate processing. Together the three herbs address metabolic syndrome from three independent directions: hormonal/thyroid (Guggul), glucose/lipid (Kulath), and microbiome/digestive (Triphala) — the three Ayurvedic roots of Medoroga (metabolic obesity) addressed in a single, scientifically coherent daily formula.
Safety & Precautions
Kulath has an excellent safety profile — it has been consumed as a daily food by millions of people across India for millennia. As with all legumes, it contains some antinutritional factors (tannins, phytic acid, protease inhibitors) that are substantially reduced by soaking, sprouting, or cooking. The following specific precautions apply:
Please note
- Vata constitutions and flatulence: Kulath's Ruksha (drying) and Laghu (light) properties can aggravate Vata, particularly in constitutions already prone to dryness, constipation, or gas. Always cook Kulath thoroughly with digestive spices (ginger, cumin, hing/asafoetida) to reduce Vata-aggravating effects. Raw seeds should not be consumed in large quantities. 3
- Diabetes medications: Kulath's α-amylase inhibition and DPP-4 inhibitory activity lower blood glucose. Those on antidiabetic medications (especially insulin or sulfonylureas) should monitor blood glucose levels and inform their healthcare provider before significantly increasing Kulath consumption or taking therapeutic doses, as dose adjustment may be needed. 7
- Hyperuricaemia and gout: As a protein-rich legume, Kulath contains purines — those with hyperuricaemia (high uric acid) or gout should use in moderation. Classical Ayurvedic guidance also notes that Kulath can aggravate conditions with excess Vata or dryness. 3
- Pregnancy: Traditional texts record Kulath as having emmenagogue properties (may stimulate menstrual flow) — use at food amounts is generally safe; therapeutic doses should be discussed with a healthcare provider during pregnancy.
- Antinutrients — preparation matters: Always soak Kulath seeds for at least 4–8 hours (preferably overnight) before cooking or using as soaking water. Soaking substantially reduces phytic acid, tannins, and protease inhibitors, improving both nutritional bioavailability and digestibility. 1
Key Takeaways
Evidence-backed bullet points:
Cultivated in India since 2500 BC — one of the oldest documented legume crops in human history; the Charaka Samhita prescribes it as the primary dietary therapy for kidney stones
PMC7327257: Kulath extract significantly (p<0.001) increased urinary magnesium and citrate (crystal inhibitors) and reduced calcium, oxalate, uric acid, and urea (crystal promoters) in a validated urolithiasis model
Calcium oxalate crystal inhibition: aqueous extract achieved 45% nucleation inhibition in Himalayan variety screening — and directly dissolved both CaOx crystals and human kidney stone samples in vitro
Myricetin inhibits DPP-4 — the same enzyme targeted by the pharmaceutical gliptin drug class (sitagliptin, saxagliptin); increases GLP-1 and insulin secretion
Purified α-amylase inhibitor protein (Ki = 11 µM) significantly reduced serum glucose in diabetic mice with minimum organ pathology — a mechanistically precise antidiabetic protein from a food legume
Three independent antidiabetic mechanisms in one seed: α-amylase inhibition + DPP-4/GLP-1 pathway + α-glucosidase inhibition — a remarkable pharmacological breadth for a food crop
22–24% protein — exceeds many common pulses, grown on marginal land where premium crops fail; the "poor man's pulse" is nutritionally richer than many expensive alternatives
Bioflavonoids inhibit COX-1 and COX-2 enzymes — the same anti-inflammatory pathway as ibuprofen and naproxen, confirmed by Ramalingam et al. (2020)
Himalayan communities who consume Kulath regularly as a dietary staple have lower recorded rates of kidney stone disease than plains populations — a dietary epidemiology observation that inspired the pharmacological research
Soak overnight before use — reduces antinutrients significantly; aggravates Vata in excess; monitor blood glucose if on antidiabetic medication; safe as regular food at culinary doses for most adults
References
- Oli, P., Joshi, K. and Punetha, S. (2024) 'Traditional uses, phytochemistry, pharmacology, and nutraceutical potential of horse gram (Macrotyloma uniflorum): A systematic review', Journal of Food Science (Wiley), 90(1), pp.e17594. doi: 10.1111/1750-3841.17594. PMID: 39656760. [Primary 2024 systematic review; nutraceutical superfood designation; comprehensive phytochemistry; antidiabetic mechanisms; myricetin DPP-4/GLP-1; antinutritional factors; cultivation history 2500 BC].
- Sah, S.K., Sharma, L., Garg, D. et al. (2024) 'Therapeutic and nutritive uses of Macrotyloma uniflorum (Lam.) Verdc. (Horsegram), a somewhat neglected plant of the family Fabaceae', Natural Resources for Human Health, 4(1), pp.34–50. doi: 10.53365/nrfhh/183949. [Nutritional profile data; hypolipidaemic activity; phytosterol LDL-lowering; protein content 22–24%; orphan crop classification; climate resilience; β-sitosterol/stigmasterol mechanism].
- Sharma, P.V. (1997) Dravyaguna Vijnana, Vol. II. Varanasi: Chaukhambha Bharati Academy. [Classical Ayurvedic classification — Ashmari Nashaka, Mutrala, Kaphahara; Charaka Samhita Kulattha as primary dietary therapy for urinary calculi; Pathya Ahara designation; Vata aggravation caution; menstrual regulation traditional use; Ruksha/Laghu/Ushna Veerya properties].
- Patel, V.B. and Acharya, N. (2020) 'Effect of Macrotyloma uniflorum in ethylene glycol induced urolithiasis in rats', Heliyon, 6(6), e04247. doi: 10.1016/j.heliyon.2020.e04247. PMC7327257. PMID: 32637702. [Primary antilithiatic study; 400 and 800 mg/kg doses; p<0.001 reduction in calcium, oxalate, uric acid, urea; magnesium and citrate significantly increased; kidney histopathology improved; glomerular activity restored].
- Lalitha, N., Sadashivaiah, B., Ramaprasad, T.R. and Singh, S.A. (2020) 'Anti-hyperglycemic activity of myricetin, through inhibition of DPP-4 and enhanced GLP-1 levels, is attenuated by co-ingestion with lectin-rich protein', PLOS ONE, 15(4), e0231543. doi: 10.1371/journal.pone.0231543. PMC7156098. PMID: 32282828. [Myricetin DPP-4 inhibition mechanism; GLP-1 elevation; insulin secretion stimulation; connects Kulath's primary flavonoid to pharmaceutical gliptin pathway].
- Gautam, M., Katoch, S. and Chahota, R.K. (2020) 'Comprehensive nutritional profiling and activity-directed identification of lead antioxidant, antilithiatic agent from Macrotyloma uniflorum (Lam.) Verdc.', Food Research International, 137, p.109600. doi: 10.1016/j.foodres.2020.109600. [PMC7443191 — Himalayan variety screening; Sundernagar aqueous extract 45% ± 1.2 nucleation inhibition; anionic protein crystal inhibition; MALDI-TOF protein characterisation; CaOx crystal dissolution and human kidney stone dissolution in vitro].
- Gupta, L.H., Badole, S.L., Bodhankar, S.L. and Sabharwal, S.G. (2011) 'Antidiabetic potential of α-amylase inhibitor from the seeds of Macrotyloma uniflorum in streptozotocin-nicotinamide-induced diabetic mice', Pharmaceutical Biology, 49(6), pp.567–573. doi: 10.3109/13880209.2010.536143. PMID: 21043992. [α-Amylase inhibitor purification and characterisation; Ki = 11 µM pancreatic, 8.8 µM salivary; IC₅₀ values; in vivo blood glucose reduction; minimum pathological changes in organs].
- Ramalingam, M., Sali, V.K., Bhardwaj, M., Mani, S. and Vasanthi, H.R. (2020) 'Inhibition of cyclooxygenase enzyme by bioflavonoids in horse gram seeds alleviates pain and inflammation', Combinatorial Chemistry and High Throughput Screening, 23(5), pp.359–368. doi: 10.2174/1386207323666200127114551. [COX-1 and COX-2 inhibition by myricetin, quercetin, kaempferol; analgesic and anti-inflammatory activity confirmation; mechanism comparable to NSAID pathway].
- Mathaiyan, M., Muthukrishnan, S., Eswaran, A., Pradeep, K.S. and Ganesan, T. (2022) 'Hepatoprotective effect of M. uniflorum seed aqueous extract in alcohol-induced liver damage in rats', NeuroQuantology, 20(15), pp.5062–5073. [Liver-protective activity; AST/ALT reduction; liver architecture restoration]. Also: Sudheer, A., Reddy, K.S. and Naidu, R.J. (2023) 'Horse gram a traditional food medicine protects the kidney from the cisplatin-induced nephrotoxicity in albino rats', Indian Journal of Traditional Knowledge, 22(4), pp.746–754. [Cisplatin nephroprotection; kidney function marker improvement].
- Tiwari, A.K., Reddy, K.S., Radhakrishnan, J. and Rao, J.M. (2013) 'Inhibitory potential of various seeds towards intestinal α-glucosidase activities and glycation — raw horsegram shows stronger activity', Pharmacognosy Magazine. [Raw seed stronger α-glucosidase and PTP1β inhibition than sprouted; germination reduces antidiabetic potency; supports use of raw seed preparations for antidiabetic purposes].