Last reviewed on 11 September 2026.
NNWA publishes the name and qualifications of everyone who writes and checks its material. You can see the full teaching team on the faculty page.
That number is correct, but it describes a dry, defatted product that nobody eats dry. This guide explains what 100 g means on the plate, how good the protein is, how much is sensible, and what the evidence says about hormones, the thyroid and cancer.
What are soya chunks made of?
Defatted soy flour. Soybeans are pressed or solvent-extracted to remove their oil, and the protein-rich flour left behind is cooked under pressure and pushed through an extruder, which puffs it into spongy chunks, granules or mini chunks. Food technologists call the result textured soy protein. Removing the oil is what lifts the protein: whole soybeans have about 35 to 40 g of protein and around 20 g of fat per 100 g, while chunks carry roughly 50 g of protein and usually under 1 g of fat.
How much protein is in 100 g of dry soya chunks?
About 50 to 54 g, with 330 to 350 kcal, on most Indian pack labels. The rest is mainly carbohydrate, a good share of it fibre, along with minerals such as iron and calcium. Differences between brands reflect the flour used and how it was processed, so the panel on your own pack is the figure to trust. USDA FoodData Central values for defatted soy flour sit in the same neighbourhood, which is a useful sanity check on any label that looks too good.
How much protein do soya chunks have after cooking?
About 15 to 18 g per 100 g of soaked or cooked chunks. Soya chunks soak up roughly twice their own weight in water, so 100 g dry becomes around 300 g once rehydrated and lightly squeezed. The protein does not change; it is simply spread across more weight. Comparing dry soya with cooked chicken or fresh paneer is what makes soya look like a miracle food. On the plate, cooked chunks carry protein close to the figure in the protein in paneer guide, with far less fat.
| Protein | |
|---|---|
| 100 g dry | 50 to 54 g |
| 100 g soaked or cooked | 15 to 18 g |
| One serving, 25 to 30 g dry | 13 to 16 g |
The protein does not change. Soaking simply spreads it across about three times the weight. A serving comes to 85 to 105 kcal before any oil or gravy.
How much protein is in one serving of soya chunks?
A typical serving of 25 to 30 g dry gives roughly 13 to 16 g of protein and 85 to 105 kcal before any oil or gravy is added. Once soaked it fills a generous katori. That is a little more protein than two eggs provide, which makes one serving a useful part of a meal rather than a whole day's supply. Dry chunks are light and bulky, so weigh your usual scoop once on a kitchen scale. Soya pulao, soya curry and soya bhurji all start from about this amount.
Is soy protein as good as animal protein?
Very nearly. Soy is one of the few plant foods whose protein is complete, supplying all nine essential amino acids in useful amounts, and it is well digested once processed and cooked. On PDCAAS, the protein quality score adopted by FAO and WHO, soy protein scores close to 1.0, the ceiling it shares with milk and egg protein. Methionine is its relatively limiting amino acid, which cereals help to cover, so soya with rice or roti is a well-matched pair.
How much soya chunks can you eat in a day?
For most healthy adults, one serving of 25 to 30 g dry a day is a sensible habit, and there is no need to push much further. Soy is a food, not a supplement, and amounts of this order are broadly comparable to what many people in Japan and China eat as tofu, soy milk and similar foods. Eating large bowls every day to chase a protein number tends to push out dal, curd, nuts and vegetables, which bring nutrients soy does not. Variety across the week beats volume on any one day.
Do soya chunks affect male hormones?
At normal food amounts, the evidence says no. Soy contains isoflavones, plant compounds with a weak oestrogen-like structure, and that is where the worry starts. Meta-analyses of clinical trials in men have found that soy foods and isoflavone intakes typical of Asian diets do not meaningfully change testosterone or oestrogen levels. Trials comparing soy with whey during strength training have found broadly similar muscle gains. The rare case reports of breast tissue changes in men involved very large daily intakes over long periods, far beyond a katori of chunks.
Should people with thyroid problems avoid soya chunks?
Usually not, but timing matters for anyone on thyroid tablets. Soy can reduce the absorption of levothyroxine when eaten close to the dose, so the tablet should go down on an empty stomach and soy should wait a few hours. For people with a healthy thyroid and enough iodine, which iodised salt provides, moderate soy has not been shown to cause hypothyroidism. If you plan a large change in how much soy you eat while on levothyroxine, tell your doctor, who may recheck TSH after some weeks. The hypothyroidism foods guide covers the rest of the diet.
Does soy increase the risk of breast cancer?
Moderate soy from food has not been linked to harm, and large cohort studies from China and Japan suggest it may be associated with lower risk. Women with a history of breast cancer were once told to avoid soy altogether; major cancer research bodies now regard soy foods in normal amounts as safe for them. All of this concerns foods such as soya chunks, tofu and soy milk. Concentrated isoflavone supplements are a different product with far thinner evidence, and nothing here applies to them.
Why do soya chunks cause gas and bloating?
Soy contains oligosaccharides, mainly raffinose and stachyose, which human enzymes cannot break down and gut bacteria ferment, producing gas. Some people also react to a sudden jump in fibre. Soaking the chunks in hot water, squeezing them out and discarding that water removes some of these sugars, and starting with a smaller portion lets the gut adjust over a couple of weeks. Cooking with ginger, hing or jeera is traditional and pleasant, though the evidence for their effect on gas is thin. Hives, swelling or vomiting after soy suggest allergy rather than ordinary wind.
Introducing soya without the wind
The gas comes from oligosaccharides that human enzymes cannot break down and gut bacteria ferment.
Soak in hot water and throw that water away
Squeezing the chunks out and discarding the soaking water takes some of the responsible sugars with it.
Start below a full serving
A smaller portion lets the gut adjust over a couple of weeks before you move up to the usual 25 to 30 g dry.
Cook it the way it is usually cooked
Ginger, hing and jeera alongside soy are traditional and pleasant, though the evidence that they do much for the gas itself is thin.
Keep it to about a serving a day
One serving suits most healthy adults, and large bowls every day tend to push out dal, curd, nuts and vegetables, which bring what soy does not.
Tell the difference from an allergy
Hives, swelling or vomiting after soy point to allergy rather than ordinary wind, and that needs a doctor rather than a smaller portion.
Are soya chunks a good choice for vegetarians and vegans?
They are among the most efficient, particularly for people who eat no eggs and little dairy. Chunks are inexpensive, keep for months in a dry tin and take on whatever masala they meet. They should sit alongside, not replace, the other foods covered in the vegetarian protein sources guide. For a vegan, soya chunks, soy milk, tofu and a range of dals together make daily protein targets far easier to reach than any single food.
Who should be cautious with soya?
People with a soy allergy, one of the commoner food allergies in young children, should avoid it entirely. Anyone told to restrict protein or phosphorus for kidney disease needs to count soya chunks carefully, since a small dry weight carries a lot of both. People with irritable bowel symptoms may find the fermentable sugars troublesome. For everyone else, the main caution is the gravy, because soya chunks behave like sponges and a restaurant soya curry can soak up a startling amount of oil.
How can nutrition professionals use soy well?
By treating it as a practical food rather than a superfood or a threat. Vegetarian and vegan clients often need help building complete, varied plates, and soy is one of the most flexible tools for that job. NNWA's Plant-Based Nutrition course covers plant proteins, key micronutrients and balanced vegan plates for Indian diets over six weeks, at 10,999 rupees, reduced from 15,999, and leads to an NNWA certificate.
The honest summary
Dry soya chunks give about 50 to 54 g of protein per 100 g, but a real serving of 25 to 30 g dry gives 13 to 16 g once soaked and cooked. The protein is complete and well used by the body. A serving a day is reasonable for most people, the hormone and cancer fears are not supported at food amounts, and anyone on levothyroxine simply needs to keep soy a few hours away from the tablet.