Iron in Soya Chunks: Cheap, Dense and Overlooked
Last reviewed: · What changed: Answers to common questions added.
Soya chunks are bought for protein and almost never for iron, which is an oversight worth correcting. Defatted soya chunks carry roughly 8–10 mg of iron per 100 g dry, a 30 g serving gives about 2.5–3 mg, and they cost less per milligram of iron than almost anything else on the shelf. The catch is absorption, and it is manageable.
- Soya chunks have about 8–10 mg iron per 100 g dry, among the highest of common vegetarian foods.
- A 30 g dry serving, which swells to a katori, gives roughly 2.5–3 mg.
- Soy's phytate and protein both reduce iron absorption; a vitamin C source at the meal offsets much of it.
- They are the cheapest iron per rupee in the vegetarian kitchen by a wide margin.
- As with every plant food, a low ferritin needs a test and prescribed iron, not more chunks.
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Dense on paper
Soya chunks are defatted soy flour pressed and dried, which concentrates the protein and the minerals. The result is one of the richest plant iron sources that is also cheap, shelf-stable and already in most kitchens.
| Food | Iron per 100 g |
|---|---|
| Soya chunks, defatted (dry) | ~8–10 mg |
| Til (sesame), white | ~9–15 mg |
| Bajra (pearl millet), raw | ~6–8 mg |
| Masoor dal, raw | ~6–7 mg |
| Rajma (kidney beans), raw | ~5–8 mg |
| Kala chana, raw | ~5–6 mg |
| Moong dal, raw | ~3.5–4.5 mg |
| Palak (spinach), raw | ~2.5–3 mg |
| Paneer | ~0.3–0.6 mg |
Against paneer, the other protein vegetarians reach for, the difference is stark. Paneer brings calcium and almost no iron; soya chunks bring iron and almost no calcium. Protein in soya chunks covers the protein side, and the soya question deals with the worries people raise.
What a serving gives
| Serving | approximate iron |
|---|---|
| 30 g dry soya chunks (1 katori cooked) | ~2.5–3 mg |
| 50 g dry (a generous curry portion) | ~4–5 mg |
| Soya chunk pulao, 1 plate (~25 g dry) | ~2–2.5 mg |
| Same meal with lemon and tomato | same iron, markedly better absorbed |
| 1 katori paneer, for comparison | ~0.3–0.5 mg |
At roughly 2.5–3 mg per katori, soya chunks match or beat every dal per serving. Against an RDA of 29 mg for women and 19 mg for men they are still one contributor, not a solution, but a strong one.
The absorption problem, and the fix
Soy is known to inhibit non-haem iron absorption more than most legumes, through phytate and through its own proteins. Trials show the effect is substantially offset by vitamin C at the same meal and by the processing soy has already been through. Fermented soy absorbs best; defatted chunks sit in the middle.
| What you do | effect on non-haem iron absorption |
|---|---|
| Add a vitamin C source to the meal (lemon, amla, tomato, capsicum) | Increases, often two- to three-fold |
| Tea or coffee within an hour of the meal | Decreases sharply - tannins bind iron |
| Large calcium dose with the meal (milk, curd, supplement) | Decreases |
| Soaking, sprouting or fermenting the grain or dal | Increases - phytate is reduced |
| Eating it with a little meat, fish or egg | Increases - the 'meat factor' |
| Cooking in an iron kadhai | Small increase, variable |
Practically: cook the chunks in a tomato-onion base, finish with lemon, and keep tea and milk away from the meal. Soaking the chunks in hot water and squeezing them out, which most recipes already do, removes some of the inhibitors along with the beany taste.
Cost per milligram
This is where soya chunks win outright. A 200 g packet costs about the same as a cup of coffee and carries roughly 16–20 mg of iron and 100 g of protein. No other vegetarian food comes close on iron per rupee, and few come close on protein per rupee either.
That matters for the households where iron deficiency is most common, which are rarely the ones buying imported seeds. A weekly soya chunk curry is one of the cheapest and most effective dietary iron measures available in India.
When to test
If tiredness, pallor or breathlessness is the reason for reading, ask for haemoglobin and ferritin. Iron for vegetarians explains why plant-only diets run short, and what to do about it.
| Group | ICMR-NIN RDA for iron (2020) |
|---|---|
| Adult women, 19–50 | 29 mg/day |
| Adult men | 19 mg/day |
| Pregnancy | 27 mg/day |
| Lactation | 23 mg/day |
| Women after menopause | 19 mg/day |
A low ferritin is corrected with prescribed iron over months; soya chunks then help keep it corrected. Do not self-supplement, because iron overload is harmful and thalassaemia trait is common enough in India to make a result essential first.
Using them for iron
- Soak in hot water, squeeze out, then cook in a tomato-onion base.
- Finish with lemon or add capsicum; the vitamin C is the lever.
- Serve with rice or roti, not with curd or a glass of milk.
- Keep chai an hour away.
- Alternate with chana and moong so the week's iron and protein come from more than one source.
Where KABO fits in
Soya chunks are the cheapest vegetarian iron on the shelf, and they still do not treat a diagnosed deficiency. Test first; if ferritin is low, prescribed iron is the treatment and the chunks are the maintenance.
A KABO serving provides 25 g of complete plant protein, 26 vitamins and minerals and 60+ real ingredients, with no soy at all, which matters to the people who cannot or will not eat it. The vitamin C in the formula helps plant iron absorb, and the protein is what haemoglobin is made from.
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25 g complete plant protein, 60+ superfoods, 26 vitamins & minerals, probiotics & digestive enzymes — in one 90-second shake.
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Frequently asked questions
How much iron is in soya chunks?
About 8 to 10 mg per 100 g dry, which puts defatted soya chunks among the richest common vegetarian iron sources. A 30 g dry serving, which swells to roughly a katori when cooked, gives about 2.5 to 3 mg.
Is soya chunk iron absorbed well?
Less well than iron from most dals, because soy's phytate and proteins inhibit non-haem iron absorption. The effect is largely offset by a vitamin C source at the same meal, such as lemon, tomato or capsicum, and by keeping tea and dairy away from that meal.
Are soya chunks good for anaemia?
They are one of the best everyday vegetarian iron sources and useful during and after recovery, but diagnosed anaemia needs a blood test and usually prescribed iron for several months. Food maintains the result; it does not produce it quickly.
Soya chunks or paneer for iron?
Soya chunks, by a wide margin: roughly 8 to 10 mg per 100 g dry against well under 1 mg for paneer. Paneer is a calcium food. Many vegetarian diets lean on paneer for protein and end up short of iron as a result.
How much soya chunks can I eat in a day?
A katori, around 30 g dry, a few times a week is a reasonable amount for most adults, and a daily serving is fine for many. The usual cautions about soy apply to very large intakes rather than ordinary ones; anyone with thyroid disease should ask their doctor.
How much iron is in 100 g of soya chunks?
Defatted soya chunks (dry) have about 8–10 mg of iron per 100 g. Values vary with variety and preparation.
How much iron is in 30 g dry soya chunks (1 katori cooked)?
About 2.5–3 mg of iron, according to the serving table on this page.
How much iron is in 50 g dry (a generous curry portion) of soya chunks?
About 4–5 mg of iron, according to the serving table on this page.
Are soya chunks a good source of iron?
Defatted soya chunks carry roughly 8–10 mg of iron per 100 g dry, a 30 g serving gives about 2.5–3 mg, and they cost less per milligram of iron than almost anything else on the shelf.
Soya chunks me kitna iron hota hai?
Defatted soya chunks (dry) have about 8–10 mg of iron per 100 g, according to the table on this page.
Sources
- ICMR-NIN, Indian Food Composition Tables (2017). nin.res.in
- ICMR-NIN, Nutrient Requirements for Indians (RDA 2020) and Dietary Guidelines for Indians, 2024. nin.res.in
- Hurrell R, Egli I, "Iron bioavailability and dietary reference values", American Journal of Clinical Nutrition, 2010;91(5):1461S-1467S.