Rajma Flour (Kidney Bean Flour)

About

What it is and where it shows up.

Rajma flour is a whole-food ingredient made by grinding dried kidney beans (Phaseolus vulgaris L.) into a fine powder. It is used in food formulations as a high-protein, high-fibre, gluten-free flour substitute in products such as noodles, baked goods, and traditional Indian dishes.

Safety summary

The regulatory and scientific consensus.

Rajma flour is broadly safe for the general adult population and is a nutritionally dense food with established consumption history. Raw or inadequately processed kidney bean flour contains anti-nutritional factors—including lectins (haemagglutinins), trypsin inhibitors, and phytates—that must be reduced by appropriate moist heat, prolonged boiling, or soaking before consumption; failure to do so can cause gastrointestinal distress. No ADI (Acceptable Daily Intake) has been established, as it is a whole food rather than an additive.

Regulatory landscape

What food-safety regulators have decided.

Jurisdiction	Status	Note
FSSAI (Food Safety and Standards Authority of India) (India)	Approved	FSSAI Nutraceuticals Compendium (Schedule, Regulation 27) permits cereal grains and legumes listed in Indian Food Composition Tables (NIN/ICMR), including kidney beans, to be used as processed food ingredients or supplements; specific health benefit claims require prior Food Authority approval.source
FDA (Food and Drug Administration) (United States)	Approved	Kidney beans and their derived flours are whole foods with a long history of safe use and are not food additives requiring separate GRAS notification under 21 CFR 170.30. Kidney bean flour is thus implicitly permitted as a conventional food ingredient under FDA's food safety framework (FD&C Act sections 201(s) and 409).source

Who should approach with care

Whose guidance would steer them away.

Ibs — Kidney beans are high in fermentable oligosaccharides (FODMAPs) and dietary fibre that can exacerbate bloating, gas, and abdominal discomfort in individuals with irritable bowel syndrome.

Ibd — High lectin and fibre content in kidney bean flour may aggravate intestinal inflammation during active flares of inflammatory bowel disease; cooking reduces but does not fully eliminate lectin activity.

Kidney Disease — Kidney beans are relatively high in potassium and phosphorus, which may need to be restricted in individuals with chronic kidney disease to avoid electrolyte imbalances.

Gout — Legumes including kidney beans contain moderate levels of purines, and regular high intake may raise uric acid levels, potentially worsening gout symptoms.

Infants — FSSAI regulations and nutritional guidance indicate that legume flours must be thoroughly processed to reduce anti-nutritional factors before use in infant or young-child foods, as immature digestive systems are more sensitive to lectins and trypsin inhibitors.

Research citations

The sources behind this verdict.

1PubMed. Effect of solid-state fermentation on kidney bean flour: Functional properties, mineral bioavailability, and product formulation, 2025. pmc.ncbi.nlm.nih.gov
2FSSAI. FSSAI Food Product Standards — Chapter 2.4: Cereals and Cereal Products (Version 1, 01.09.2023), 2023. fssai.gov.in
3PubMed. Functional components profile and glycemic index of kidney beans, 2022. pmc.ncbi.nlm.nih.gov
4PubMed. Physical and Dynamic Oscillatory Shear Properties of Gluten-Free Red Kidney Bean Batter and Cupcakes Affected by Rice Flour Addition, 2020. pmc.ncbi.nlm.nih.gov
5PubMed. A study on starch profile of rajma bean (Phaseolus vulgaris) incorporated noodle dough and its functional characteristics, 2015. pubmed.ncbi.nlm.nih.gov

Independently researched5 citations