Rajamasha (Cowpea) in Ayurveda: Properties & Everyday Use

In short

Rajamasha, known as cowpea in English and lobia in Hindi, is a familiar part of the Indian kitchen. Classical Ayurveda describes it as sweet and astringent in taste, heavy and dry in quality, and cooling by nature. Cowpeas are cooked as dal and curries.

In your kitchen

  • Cowpeas are also eaten as sprouts.
  • As a cooling food, tradition leans on it more in the warmer months.

Good to know

In everyday food amounts it is part of ordinary home cooking. If you're pregnant, nursing or take regular medication, check with your doctor before using it beyond normal food amounts.

What it is

Rajamasha is the Ayurvedic name for cowpea, Vigna unguiculata (L.) Walp., a legume of the Fabaceae family cultivated across Africa, Asia, and the Americas for its seeds, with the young leaves and pods also eaten as vegetables (Gupta et al., WJPR review). The seed is the part used, eaten as a pulse (dal) and, in Ayurvedic practice, prepared as a decoction. Nutritionally it is a genuine protein source: seeds run about 23% protein, 56% carbohydrate, and 4% fiber, with meaningful potassium, calcium, magnesium, phosphorus, and iron, plus vitamins A and C in the leaves and pods (same review). A note on the name: "rajamasha" here follows the Ayurvedic usage for cowpea: not the kidney bean marketed in shops as "rajma," which is a different species.

Classical properties

Traditional use

Classical and folk medicine uses several parts of the plant: the seeds are described as astringent, antipyretic, and diuretic, while leaves, seeds, and stems have been used for measles, smallpox, and urinary disorders (Gupta et al., WJPR review). A review of its medicinal uses and phytochemistry records that a decoction or soup of the seeds is used in affections of the liver and spleen, intestinal colic, leucorrhoea, and urinary discharges, and reports the folk practice of taking seed decoction for kidney stones (Vigna unguiculata medicinal-uses review). A 2017 pharmacological review states that the Ayurvedic Pharmacopoeia of India recommends the decoction of the dry seeds in calculus and amenorrhea (Ibrahim et al., IJPACR 2017). These are traditional uses, not clinical proof.

What research has looked at

Nutrition

The strongest modern data on cowpea is compositional. A 2018 overview in the Journal of the Science of Food and Agriculture describes cowpea as a high-quality plant protein source whose protein-and-carbohydrate profile complements cereal grains, and notes research interest in its anti-diabetic, anti-cancer, anti-hyperlipidemic, anti-inflammatory, and anti-hypertensive properties: while stressing that studies on the anticancer and anti-inflammatory effects have produced conflicting results and that long-term epidemiological studies of cowpea consumption are still lacking (Jayathilake et al., 2018). In short: nutritious, worth eating, not proven to prevent or treat disease.

Preclinical studies (not human evidence)

A PMC-published review of the plant's therapeutic potential catalogues the published pharmacological work: seed and plant extracts have shown antioxidant, antibacterial, antidiabetic, hypocholesterolemic, antiatherogenic, anti-sickling, antinociceptive, and thrombolytic activity: but entirely in laboratory and animal models (therapeutic-potential review). For example, the globulin fraction of the seed showed hypolipidaemic effects in rats (Ibrahim et al., IJPACR 2017). None of this establishes that eating cowpeas does any of these things in people.

What the evidence does not support (yet)

There is no clinical evidence that cowpea treats diabetes, dissolves kidney stones, lowers cholesterol, or prevents cancer in humans. The kidney-stone decoction practice and the anti-diabetic interest rest on folk use and animal work, not trials. What can honestly be said: cowpea is a protein- and mineral-rich pulse that belongs in a balanced diet.

Safety notes

Cowpea is a staple pulse eaten daily by millions, with no toxicity documented in the reviewed literature. As with other legumes, people with known legume allergy should be cautious: legume allergies (including pea, a close relative) are documented, with cross-reactivity between legumes reported (legume-allergen review). Like other pulses it contains anti-nutritional factors (phytates, trypsin inhibitors) that normal soaking and cooking substantially reduce. No specific drug interactions or pregnancy contraindications were documented in the reviewed literature.

FAQs

Is rajamasha the same as rajma?

No. Rajamasha in the Ayurvedic sense is cowpea (Vigna unguiculata); the kidney bean sold in markets as "rajma" is a different species. Both are nutritious pulses, but their nutritional profiles and traditional classifications differ, so claims about one should not be transferred to the other.

Is cowpea high in protein?

Yes, for a plant food: a peer-reviewed review reports about 23% protein in the seeds, along with 56% carbohydrate and meaningful potassium, calcium, magnesium, and iron (Gupta et al., WJPR review). It is a nutritious staple, not a protein supplement.

Can cowpea help with diabetes or cholesterol?

We located no published human trials testing this. Animal and laboratory studies of cowpea extracts report blood-sugar- and lipid-related activity, and a 2018 review calls for long-term epidemiological studies before any disease claim can be made (Jayathilake et al., 2018). Do not use cowpeas to treat either condition.

Is the seed decoction for kidney stones proven?

No. The practice of drinking cowpea seed decoction for kidney stones is recorded in folk-medicine reviews but has no clinical-trial backing (Vigna unguiculata medicinal-uses review). Kidney stones can be serious: see a clinician rather than self-treating.

Is rajamasha safe to eat daily?

As food, yes: it is a widely eaten staple pulse. People with legume allergies should avoid it, and as with all dried pulses, soak and cook it properly. There is no evidence-based medicinal dose, so do not consume large "therapeutic" quantities expecting a drug-like effect.

Sources

Disclaimer

This article is for educational purposes only and is not medical advice. Herbal products can interact with medications and are not suitable for everyone. Talk to a qualified healthcare practitioner before use — especially if you are pregnant, breastfeeding, managing a medical condition, or taking prescription medicines.

Related herbs

Herbs with overlapping classical actions and dosha effects in the Swastik herb library.