Fajita: the meat helps iron, the sodium adds up by the tortilla

The firmest numbers about fajitas come from trials on the meat in them, and those trials used pork in a plain rice meal. In a randomized trial of 45 healthy young women, adding 1.8 oz (50 g) of meat to a phytate-rich meal raised absorption of non-heme iron by 44 percent and 75 g raised it by 57 percent, while 25 g made no significant difference. These were single test meals, and they had no peppers, whose vitamin C would also change the result. The US food survey counts one fajita as 95 g. By its recipe estimates a chicken fajita comes to about 196 calories and 430 mg of sodium, and three of them bring roughly 1,300 mg. Restaurant platters with cheese and sour cream will differ from those figures. Per 100 g, the survey versions run from 166 calories for vegetable to 231 calories for beef or pork.

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

How much is actually in it

• Per 100 g, US survey fajitas range from 166 calories for vegetable to 231 calories for beef or pork, with about 450 mg sodium in the meat and shrimp versions and 24 mg vitamin C in the unspecified fajita. — USDA FNDDS records: Fajita NFS 58104990, chicken 58105000, beef or pork, shrimp, vegetable (n = 5 FNDDS records) Evidence E source
  Per 100 g: energy 166 (vegetable) to 231 calories (beef or pork); protein 3.2 to 12.1 g; fat 7.8 to 12.2 g; sodium 343 (vegetable) to 459 mg; vitamin C 23.9 mg (Fajita NFS) and 47.8 mg (vegetable); fiber 1.5 to 2 g
• The chicken filling of a UK takeaway fajita, without wrap, carries 125 calories, 16.8 g protein and 6.3 g fat per 3.5 oz (100 g). — CoFID 2021 record 19-464, Fajita, chicken, meat only, takeaway and restaurant (n = 1 CoFID record) Evidence E source
  Per 100 g: energy 125 calories, protein 16.8 g, fat 6.3 g, saturated fat 2.12 g, carbohydrate 0.3 g, water 72.6 g

What a real portion looks like

• The US food survey counts one fajita as 95 g, so a chicken fajita supplies about 196 calories and 430 mg sodium, and three make roughly 1,300 mg. — USDA FNDDS household measures, Fajita, chicken, food code 58105000 (n = 1 FNDDS record) Evidence E source
  1 fajita 95 g, 1 cup 120 g; chicken fajita per piece about 195.7 calories and 428.5 mg sodium, recalculated from per-100 g values

What your body absorbs

• In an RCT of 45 women, adding 50 g or 2.6 oz (75 g) of meat to a phytate-rich meal raised non-heme iron absorption by 44% and 57%, while 25 g had no significant effect. — 45 healthy women, mean age 24, basic meal of rice, tomato sauce, pea puree and wheat roll with 0, 25, 50 or 75 g pork, radio-labeled iron (n = 45) Evidence B source
  Non-heme iron absorption +44% with 50 g and +57% with 75 g meat (both P < 0.001); 25 g not significant (P = 0.13)
• In an RCT of 21 women, meat cooked at 248 °F (120 degrees C) still raised non-heme iron absorption from a meal by 2.0 percentage points, no less than meat cooked at 158 °F (70 degrees C). — 21 women aged about 25, basic phytate-rich meal with or without 75 g pork cooked at 70, 95 or 248 °F (120 degrees C) (n = 21) Evidence B source
  Extra non-heme iron absorption 0.9% (70 C), 0.7% (95 C), 2.0% (120 C, P < 0.001); higher cooking temperature did not impair the meat effect

What cooking and storage change

• In a small Mexican case-control study, intense frying, meat grilling and poultry cooking was associated with about five times the odds of breast cancer. — 120 women in northwest Mexico, 60 biopsy-confirmed breast cancer cases and 60 controls (n = 120) Evidence C source
  Intense cooking OR 5.54 (95% CI 2.13 to 14.41), adjusted
• In a US registry of 3,364 colorectal cancer cases, pan-fried beefsteak was linked to higher odds of the cancer while total red meat was not, and grilled hamburgers showed an inverse link. — 3364 colorectal cancer cases vs siblings, spouses and 1620 population controls, Colon Cancer Family Registry (n = 3364 cases) Evidence C source
  Positive trend for pan-fried beefsteak (P trend < 0.001); no association for total red or processed meat; inverse for grilled hamburgers (P trend 0.002)

What it does to your health

• A 2025 meta-analysis of 27 studies linked beef eating with 30% higher colorectal cancer risk and pork with 17% higher, mostly from observational data. — 27 studies, 1993-2024, over 1 million participants (n = 27 studies) Evidence C source
  Beef RR 1.30 (95% CI 1.10 to 1.54); pork 1.17 (1.09 to 1.25); lamb 1.11 (1.02 to 1.21)

Safety, limits and interactions

• FDA says beef steak should reach 145 F with a 3 minute rest, poultry 165 F and shrimp until the flesh is pearly and opaque, and a marinade used on raw meat should not be reused unless boiled first. — home cooks, US consumer food safety guidance Evidence E source
  Steak strips 145 F plus 3 minute rest; chicken 165 F; shrimp flesh pearly and opaque; do not reuse raw-meat marinade unless boiled; color and texture are unreliable

Who this works differently for

• In an 8-week RCT of 52 iron-deficient women taking a daily iron supplement with lunch, a lunch with 4 oz (113 g) of beef or a plant-based meat gave the same gain in ferritin of about 11 ug/L. — 52 non-pregnant women of reproductive age with serum ferritin below 25 ug/L, 8 weeks, iron supplement with lunch containing 113 g beef or Beyond Meat (n = 52) Evidence B source
  Ferritin +10.7 ug/L, hemoglobin +0.5 g/dL over 8 weeks in both groups; no treatment-by-time difference (P > 0.05)

The bottom line

The worry about high-heat cooking rests on observational data, and it is mixed. In a small case-control study of 120 women in northwest Mexico, intense frying, meat grilling and poultry cooking came with about five times the odds of breast cancer (odds ratio 5.54, 95% CI 2.13 to 14.41), an exploratory result with a very wide interval. In a US registry of 3,364 colorectal cancer cases, pan-fried beefsteak was linked to higher odds of the cancer and total red meat was not, in an analysis that tested many cooking methods at once. A 2025 meta-analysis of 27 mostly observational studies linked eating beef with 30 percent higher colorectal cancer risk (95% CI 10 to 54 percent). Case-control studies in it gave stronger associations than cohorts. None of these studies measured fajitas. Heat did not cancel the iron effect in a second trial. In 21 women, pork cooked at 248 °F (120 degrees C) still raised non-heme iron absorption from a meal by 2.0 percentage points, though only oven temperatures were compared and searing on a griddle was not tested. For women who are already iron deficient the type of protein made no significant difference. In an 8-week randomized trial of 52 of them taking an iron supplement with lunch, meals with 4 oz (113 g) of beef or a plant-based meat gave the same rise in ferritin, about 11 ug/L. For safety the one card is FDA cooking guidance. It gives 145 F with a 3 minute rest for beef steak, 165 F for poultry, and shrimp until the flesh is pearly and opaque. FDA also says color and texture are unreliable signs that meat is safe. Thin fajita strips reach temperature fast, but their color is no proof they are done. A marinade that held raw meat should not be reused unless you boil it first. We have no card on allergies, pregnancy or medicines for fajitas, and that silence is a gap in our search that says nothing either way about risk. The vegetable fajita is the lighter one in the survey data, at 343 mg of sodium per 3.5 oz (100 g) against about 450 mg for the meat and shrimp versions.

Sources

1. fajt-daily-r4-01 · reference dataset
   FNDDS 2708603 Fajita, NFS: Energy 219 kcal, Sodium 455 mg, Vitamin C 23.9 mg; 2708604 Fajita, chicken: Energy 206 kcal, Protein 11.33 g, Total lipid (fat) 9.8 g, Sodium 451 mg; 2708605 Fajita, beef or pork: Energy 231 kcal, Protein 12.07 g, Total lipid (fat) 12.24 g, Sodium 459 mg; 2708606 Fajita, shrimp: Energy 189 kcal, Sodium 456 mg; 2708607 Fajita, vegetable: Energy 166 kcal, Protein 3.22 g, Sodium 343 mg, Vitamin C 47.8 mg per 100 g
   USDA FNDDS via FoodData Central, release 2026-04-30, food codes 58104990-58105000 and related · checked 2026-09-28
2. fajt-daily-r4-02 · reference dataset
   CoFID 19-464 Fajita, chicken, meat only, takeaway and restaurant: Energy 125 kcal, Protein 16.8 g, Fat 6.3 g, Satd FA 2.12 g, Carbohydrate 0.3 g, Water 72.6 g per 100 g
   CoFID 2021, Public Health England / OGL v3.0 · checked 2026-09-28
3. fajt-daily-r4-03 · reference dataset
   FNDDS 2708604 Fajita, chicken, FNDDS code 58105000 - 1 fajita 95 g; 1 cup 120 g; Quantity not specified 95 g; Energy 206 kcal/100 g; Sodium, Na 451 mg/100 g
   USDA FNDDS via FoodData Central, release 2026-04-30, food code 58105000 · checked 2026-09-28
4. fajt-daily-r4-04 · randomized controlled trial
   Twenty-five grams meat did not increase nonheme-iron absorption significantly (P = 0.13), whereas absorption increased 44% (P < 0.001) and 57% (P < 0.001), respectively, when 50 and 75 g meat were added to the basic meal.
   Am J Clin Nutr, 2003 · checked 2026-09-28
5. fajt-daily-r4-05 · randomized controlled trial
   Nonheme iron absorptions were 0.9 (0.5-4.0)% (P = 0.06), 0.7 (0.4-3.9)% (P = 0.1) and 2.0 (1.3-3.1)% (P < 0.001) greater when meat cooked at 70, 95 or 120 degrees C, respectively, was added to the basic meal. Increasing the cooking temperature of meat did not impair nonheme iron absorption compared with cooking at 70 degrees C.
   J Nutr, 2003 · checked 2026-09-28
6. fajt-daily-r4-07 · case-control study
   Intense frying, meat grilling and poultry resulted in a significant BC risk (Model 1: ORadj: 5.54,95%CI: 2.13-14.41), p < 0.001; Model 2: ORadj: 5.12, 95%CI: 1.83-14.31, p = 0.002).
   Nutr Health, 2024 · checked 2026-09-28
7. fajt-daily-r4-08 · case-control study
   We found no evidence of an association between total nonprocessed red meat or total processed meat and CRC risk. Our main finding was a positive association with CRC for pan-fried beefsteak (P(trend) < 0.001), which was stronger among MMR deficient cases (heterogeneity P = 0.059).
   Cancer Med, 2015 · checked 2026-09-28
8. fajt-daily-r4-09 · meta-analysis
   Beef consumption was significantly associated with increased CRC risk, with a 30% overall risk increase (95% CI: 1.10-1.54).
   J Gastrointest Cancer, 2025 · checked 2026-09-28
9. fajt-daily-r4-10 · agency guidance
   Don’t reuse marinades used on raw foods unless you bring them to a boil first. ... Color and texture are unreliable indicators of safety. ... 145oF with a 3 minute rest time ... 165oF ... Flesh pearly & opaque
   FDA, Safe Food Handling, consumer guidance, updated 2024-03-05 · checked 2026-09-29
10. fajt-daily-r4-06 · randomized controlled trial
    Daily consumption of an iron supplement with a lunch meal for 8 wk improved serum ferritin concentrations (main time effect: +10.7 ± 9.6 μg/L, P < 0.0001), transferrin saturation (main time effect: +5.1% ± 18.7%, P = 0.048), soluble transferrin receptor (main time effect: -0.6 ± 1.0 mg/L, P < 0.001), body iron stores (main time effect: +2.8 ± 3.1 mg/kg, P < 0.0001), and hemoglobin (main time effect: +0.5 ± 0.9 g/dL, P = 0.0002) regardless of whether the meals contained Animal or Plant (treatment-by-time interaction: P > 0.05 for all indicators).
    Am J Clin Nutr, 2025 · checked 2026-09-28