Fish curry: the only trials used one small fish in Bangladesh

The only randomized trials of fish curry gave 196 Bangladeshi children aged 3 to 7, all with marginal vitamin A status, 1.8 oz (50 g) of curry with rice six days a week for 9 weeks. Curry made from mola, a small local fish, did not raise their serum retinol (P = 0.52), while a rui curry with added retinyl palmitate did. Most of the vitamin A in mola is a form the children did not appear to convert, so the result belongs to that species. On iron, mola lowered serum transferrin receptor by 0.73 mg/L (95% CI 0.17 to 1.28) against the comparison group, and ferritin and hemoglobin did not change. One marker moved and the main ones did not. No trial has tested adults or the fish most curries use, such as salmon, tilapia or cod. What a bowl holds depends on the cook. UK data for a homemade recipe give 139 calories, 11.3 g protein, 9.6 g fat and 430 mg sodium per 3.5 oz (100 g), and the fish, the oil and any coconut milk change the fat and salt a lot.

As people eat it, per 3.5 oz (100 g)

How much is actually in it

• UK reference data put homemade fish curry at 139 calories, 11.3 g protein, 9.6 g fat and 430 mg sodium per 3.5 oz (100 g), with 1.4 mcg vitamin D. — CoFID 2021 record Curry, fish, homemade (16-364); a Bangladeshi homemade fish curry record (16-446) gives 125 calories, 12.4 g protein and 8.0 g fat (n = 2 records) Evidence E source
  Per 100 g: energy 139 calories, protein 11.3 g, fat 9.6 g (polyunsaturated 3.80 g), sodium 430 mg, vitamin D 1.4 mcg, vitamin B12 1.3 mcg, iron 1.05 mg
• Among ethnic dishes analyzed for South Asians in the UK, fish curry was the top source of vitamin D at 1.4 mcg per 3.5 oz (100 g). — Ethnic foods eaten by South Asian adults and children in the UK, analyzed for nutrient content Evidence D source
  Fish curry 1.4 mcg vitamin D per 3.5 oz (100 g), highest among the ethnic dishes analyzed

What a real portion looks like

• US survey coding treats a cup of fish curry as 240 g, which carries about 842 mg sodium. With rice a cup is 200 g and about 618 mg. — USDA FNDDS records Fish curry (FDC 2706460) and Fish curry with rice (FDC 2706461), used to code US dietary recalls Evidence E source
  Sodium 351 mg per 3.5 oz (100 g), 842.4 mg per 240 g cup; with rice 309 mg per 3.5 oz (100 g), 618.0 mg per 200 g cup; polyunsaturated fat 1.779 g per 3.5 oz (100 g), 4.3 g per cup

What your body absorbs

• In a randomized trial in 196 Bangladeshi children, 9 weeks of curry made from the small fish mola did not raise serum retinol, while rui curry with added retinyl palmitate did. — 196 children aged 3 to 7 with serum retinol 0.36 to 0.75 micromol/l, given 1.8 oz (50 g) fish curry with rice 6 days a week for 9 weeks (n = 196) Evidence B source
  No effect on serum retinol (P = 0.52) or retinol binding protein (P = 0.81) with mola curry versus negative control; positive control improved (P < 0.001)
• In the same 196 children, mola curry, with four times the iron of rui curry, lowered serum transferrin receptor by 0.73 mg/L over 9 weeks but did not change ferritin or hemoglobin. — 196 Bangladeshi children aged 3 to 7 with marginal vitamin A status, fish curry meals 6 days a week for 9 weeks (n = 196) Evidence B source
  Serum transferrin receptor down 0.73 mg/L (95% CI 0.17 to 1.28, p = 0.01) versus positive control; no difference in ferritin or hemoglobin

What cooking and storage change

• By USDA factors for simmered lean fish, the fish keeps 80 to 100% of its iron, zinc and calcium and 80 to 95% of its thiamin, folate and vitamin B12, with choline fully kept. — USDA retention factors for the group Finfish and Shellfish Products, lean fish (under 5% fat) simmered, with and without drippings Evidence E source
  Without drippings (2401): iron, zinc, calcium 100%, thiamin 80%, folate 80%, B12 85%; with drippings (2402): iron, zinc, calcium 80%, thiamin 90%, B12 95%

Safety, limits and interactions

• Nine people who ate one fish curry from a mobile canteen in Australia fell ill within hours from combined histamine and wax ester poisoning, traced to castor oil fish. — 9 people who ate fish curry from a mobile canteen, Australia (n = 9) Evidence C source
  Raised heart rate, flushing, headache, nausea and diarrhea lasting a mean of nine hours
• FDA and EPA advise people who are pregnant or breastfeeding to eat 8 to 12 ounces of lower mercury seafood a week, which sets how often a fish curry fits. — People who are pregnant or breastfeeding, United States Evidence E source
  8 to 12 ounces of lower mercury seafood per week

What is still unknown

• The only trials of fish curry tested one small Bangladeshi fish in 196 children over 9 weeks, and their authors call for more research on its functional effect in humans. — 196 Bangladeshi children aged 3 to 7, 9 weeks (n = 196) Evidence B source
  No conversion of 3,4-dehydroretinol to retinol shown; functional effect untested

The bottom line

Sodium is the number that adds up. US survey coding counts a cup of fish curry as 240 g with about 842 mg sodium, and a cup of fish curry with rice as 200 g with about 618 mg, both recalculated from 100 g values, so home and restaurant bowls will vary. Fish curry carries 1.4 mcg vitamin D per 3.5 oz (100 g), which put it first among the ethnic dishes analyzed for South Asians in the UK. That is still a small share of a daily need of 10 to 15 mcg. Simmering lean fish keeps most of what the fish brings. By USDA factors for that cooking method, iron, zinc and calcium stay at 80 to 100 percent and vitamin B12 at 85 to 95 percent, with thiamin and folate at 80 percent or more. These factors are set for the food group, date back decades and do not model spices, coconut milk or long simmering. They also say nothing about vitamin D or omega-3. The real hazards sit with the fish. Nine people who ate one curry from a mobile canteen in Australia developed flushing, a fast heart rate, headache, nausea and diarrhea within hours, lasting about nine hours on average, from histamine and wax esters in castor oil fish. That was a single outbreak and it points at the species and its freshness. If you are pregnant or breastfeeding, the FDA and EPA advise 8 to 12 ounces a week of a variety of lower mercury seafood, and the mercury in a curry depends on which fish went into it. We have no card on fish allergy or on medicines for this dish.

Sources

1. fcur-r5-01 · CoFID 2021, dataset
   CoFID 16-364 Curry, fish, homemade: Energy 139 kcal, Protein 11.3 g, Fat 9.6 g, Poly FA 3.80 g, Satd FA 1.72 g, Sodium 430 mg, Vitamin D 1.4 µg, Vitamin B12 1.3 µg, Iron 1.05 mg per 100 g. CoFID 16-446 Curry, fish, Bangladeshi, homemade: Energy 125 kcal, Protein 12.4 g, Fat 8.0 g, Iron 1.14 mg per 100 g
   CoFID 2021 (Public Health England), Curry, fish, homemade, code 16-364; Curry, fish, Bangladeshi, homemade, code 16-446 · checked 2026-10-02
2. fcur-r5-08 · food composition study
   The top five ethnic foods containing highest levels of selected nutrients were lamb balti (3mg/100g iron), lamb kebab (3.2mg/100g zinc), mixed dhal (62μg/100g folate), fish curry (1.4μg/100g vitamin D), ghee (968μg/100g retinol) and toor dhal (9.1g/100g dietary fibre).
   Food Chem, 2013 · checked 2026-10-02
3. fcur-r5-02 · USDA FNDDS 2021-2023, dataset
   FNDDS 2706460 Fish curry: Sodium, Na 351 mg per 100 g; 1 cup 240 g = 842.4 mg; Fatty acids, total polyunsaturated 1.779 g per 100 g, 1 cup 240 g = 4.3 g. FNDDS 2706461 Fish curry with rice: Sodium, Na 309 mg per 100 g; 1 cup 200 g = 618.0 mg
   USDA FNDDS 2021-2023, Fish curry (FDC 2706460) and Fish curry with rice (FDC 2706461) · checked 2026-10-02
4. fcur-r5-04 · randomized controlled trial
   After 9 weeks, no significant treatment effects were observed for serum retinol (P = 0.52) and retinol-binding protein (P = 0.81) in the experimental group compared with the negative control, whereas the positive control improved significantly (P < 0.001).
   Br J Nutr, 2008 · checked 2026-10-02
5. fcur-r5-05 · randomized controlled trial
   In the experimental group receiving mola, serum transferrin receptor concentration declined 0.73 mg/L (95% CI 0.17, 1.28, p=0.01) compared to the positive control group, while there were no differences between groups in ferritin or haemoglobin.
   Asia Pac J Clin Nutr, 2016 · checked 2026-10-02
6. fcur-r5-03 · USDA Table of Nutrient Retention Factors, dataset
   USDA-RETN-R6:2401 FINFISH,<5%FAT,SIMMERED,WO/DRIPPING, group Finfish and Shellfish Products: calcium_mg 100%, iron_mg 100%, zinc_mg 100%, thiamin_mg 80%, folate_total_ug 80%, vitamin_b12_ug 85%, riboflavin_mg 90%, choline_mg 100%; USDA-RETN-R6:2402 FINFISH,<5%FAT,SIMMERED,W/DRIPPINGS: calcium_mg 80%, iron_mg 80%, zinc_mg 80%, thiamin_mg 90%, vitamin_b12_ug 95%, riboflavin_mg 100%, choline_mg 100%
   USDA Table of Nutrient Retention Factors, Release 6, 2007, Retn_Codes 2401 and 2402 · checked 2026-10-02
7. fcur-r5-06 · case-control study
   Nine people who ate a fish curry from a mobile canteen experienced increased heart rate, flushed skin, headache, nausea and diarrhoea shortly afterwards.
   Commun Dis Intell Q Rep, 2004 · checked 2026-10-02
8. fcur-r5-07 · government dietary advice
   Those who are pregnant or breastfeeding consume between 8 and 12 ounces per week of a variety of seafood from choices that are lower in mercury.
   FDA and EPA, Advice about Eating Fish, updated 2024 · checked 2026-10-02
9. fcur-r5-09 · randomized controlled trial
   The present results do not suggest conversion of the large amount of 3,4-dehydroretinol in mola curry to retinol. Further research on the functional effect of mola in humans is needed.
   Br J Nutr, 2008 · checked 2026-10-02