TeraiFarmsIron in Kalanamak Rice: A Heritage Grain for Anaemia
Kalanamak rice contains approximately 3.1 mg of iron per 100 g (dry weight) — significantly more than most polished white rice (0.4-1.0 mg/100g) and higher than typical brown rice (1.5-2.0 mg/100g). The iron is held in the aleurone layer, preserved by Kalanamak's low-heat milling process. Paired with vitamin C, absorption improves markedly.
Iron deficiency affects an estimated 50-60% of Indian women and is one of the leading causes of anaemia in India. The food we eat daily shapes our iron intake over years, and for households where rice is the centrepiece of every meal, the iron content of that rice matters. Kalanamak's ~3.1 mg per 100g is not a therapeutic dose, but as a daily staple eaten two or three times a day it represents a consistent, meaningful contribution — one that most polished white rice simply cannot match.
- ~3.1 mg iron per 100g — several times higher than most polished white rice.
- Aleurone layer: the iron source; preserved by low-heat milling, stripped by heavy polishing.
- Non-haem iron: plant-based iron that absorbs best alongside vitamin C.
- Not a treatment: Kalanamak is a food that supports iron intake, not a clinical intervention for anaemia.
- Soaking helps: reduces phytic acid, which can inhibit iron absorption.
Why does Kalanamak contain more iron than white rice?
Iron in rice grain is not distributed evenly. It is concentrated in the aleurone layer — the thin, nutritionally dense coating that sits between the fibrous husk and the starchy white endosperm. The endosperm itself (the white part you see when you look at milled rice) contains very little iron.
When rice is conventionally milled, friction and heat remove the outer husk and, in the process, most or all of the aleurone. The result is polished white rice with iron values of 0.4-1.0 mg per 100g. Brown rice, which retains its bran and most of the aleurone, does better at 1.5-2.0 mg/100g, but the milling applied to commercially sold brown rice still removes some of the aleurone.
Kalanamak at TeraiFarms is milled using a low-heat, low-friction process designed specifically to remove the outer husk without abrading the aleurone. This is a deliberate quality decision that costs more in processing time but preserves the grain's nutritional density. The resulting iron content of ~3.1 mg per 100g reflects how much the aleurone holds when it is kept intact.
The second factor is genetic. Kalanamak is a heritage landrace, not a modern hybrid. Heritage varieties were shaped by centuries of traditional cultivation rather than high-yield selection. Their aleurone layers are typically denser and more mineral-rich than modern varieties bred purely for yield and whiteness.
Iron in Kalanamak vs other rice: the comparison
| Rice variety | Iron (mg per 100g, dry) | Milling type |
|---|---|---|
| Kalanamak | ~3.1 | Low-heat; aleurone preserved |
| Brown rice | ~1.5-2.0 | Hull removed; bran retained |
| White basmati | ~0.6-1.0 | Conventionally polished |
| Sona Masuri (white) | ~0.6 | Conventionally polished |
| Standard white rice | ~0.4-0.8 | Heavily polished; aleurone removed |
Source: ICMR-NIN Indian Food Composition Tables (IFCT) 2017; ICAR-NRRI Kalanamak grain quality studies.
What does 3.1 mg iron per 100g mean for daily intake?
The Indian Council of Medical Research (ICMR) recommends the following daily iron intakes:
- Adult men: ~17 mg/day
- Non-pregnant women (19-50 years): ~21 mg/day
- Pregnant women: ~35 mg/day
A typical 80 g dry serving of Kalanamak (approximately one cup uncooked, serving one adult) provides approximately 2.5 mg of iron before absorption adjustments. With two rice meals a day, that amounts to ~5 mg iron from rice alone — roughly 25-30% of the adult male requirement and about 24% of the non-pregnant women's requirement, before factoring in absorption rates.
Iron from plant sources (non-haem iron) absorbs at roughly 5-15% efficiency, compared to 20-30% for haem iron from meat. Absorption improves when paired with vitamin C. Assuming a 10% absorption rate — a reasonable middle estimate for a mixed vegetarian meal — the effective iron absorbed from one 80g dry serving is approximately 0.25 mg. That is a small but consistent daily contribution across a population where rice is eaten twice daily.
How to improve iron absorption from Kalanamak
Non-haem iron absorption is strongly influenced by what else is eaten in the same meal. Two practices improve it significantly.
1. Pair with vitamin C. Vitamin C reduces ferric iron (Fe³⁺, poorly absorbed) to ferrous iron (Fe²⁺, well absorbed). Even a modest amount of vitamin C — the juice of half a lemon, a tomato-based curry, a fresh salad with bell pepper or amla — can increase non-haem iron absorption by 2-4 times. The traditional Indian practice of squeezing lemon over dal-chawal is nutritionally well-founded.
2. Soak before cooking. Kalanamak, like all grains, contains phytic acid (phytate) — a natural compound that binds minerals and reduces their absorption. Soaking the grain for 20-30 minutes and discarding the soaking water before cooking reduces phytic acid content, improving the bioavailability of iron and other minerals.
3. Avoid tea and coffee with meals. Tannins in tea and coffee (and some spices) bind non-haem iron strongly, inhibiting absorption. Drinking tea or coffee 1-2 hours before or after an iron-containing meal, rather than during it, helps preserve iron absorption.
The heritage grain with the aleurone intact
Low-heat milled Kalanamak from Siddharthnagar — aleurone preserved, iron retained. GI-tagged, vacuum-packed, ships pan-India.
Shop Kalanamak · Rs 449Frequently asked questions
How much iron does Kalanamak rice contain?
Why does Kalanamak have more iron than white rice?
Is Kalanamak rice good for iron deficiency anaemia?
How can I improve iron absorption from Kalanamak rice?
How does the iron in Kalanamak compare to brown rice?
- ICMR–National Institute of Nutrition, Indian Food Composition Tables (IFCT) 2017 — iron values for rice varieties.
- ICAR–National Rice Research Institute — Kalanamak phytochemistry and grain quality studies.
- Indian Council of Medical Research — Recommended Dietary Allowances and Estimated Average Requirements for Indians (2020).
- Hallberg L, Hulthen L. “Prediction of dietary iron absorption.” American Journal of Clinical Nutrition, 2000.