Bacon and Canadian bacon: salty, and the risk data is observational

No randomized trial here tests bacon on its own. The closest is a crossover trial of 25 healthy adults aged 21 to 39, who ate a fast-food meal of hamburger, bacon and cola or an energy-matched salmon burger meal. Rises in glucose and insulin were 44 percent lower after the salmon meal. Bacon was one part of that meal, so the result belongs to the meal as a whole. The long-term numbers come from observational studies. An umbrella review of cohort meta-analyses linked two slices of bacon a day with about twice the incidence of type 2 diabetes (HR 2.07, 95% CI 1.40 to 3.05), and lifestyle may account for part of it. A meta-analysis of 12 cohort and 30 case-control studies, most of them case-control, linked bacon with higher gastric cancer risk (RR 1.37, 95% CI 1.17 to 1.61). We found no study of Canadian bacon on its own, so none of these figures separates the two.

How much is actually in it

• Cooked restaurant bacon averaged 1830 mg of sodium per 3.5 oz (100 g) across 69 USDA samples, ranging from 1280 to 2590 mg. — Pork, cured, bacon, cooked, restaurant; 69 analyzed samples (n = 69) Evidence E source
  Sodium 1830 mg/100 g (1280-2590); total fat 36.5 g (25.8-47.9); protein 40.9 g (31.8-55.0)
• Grilling back bacon raises its values per 3.5 oz (100 g) from 215 to 287 calories and from 1140 to 1390 mg of sodium, as water cooks out. — CoFID codes 19-497 (Bacon rashers, back, raw) and 19-500 (Bacon rashers, back, grilled) (n = -) Evidence E source
  Raw: 215 calories, fat 16.5 g, protein 16.5 g, water 63.9 g, sodium 1140 mg; grilled: 287 calories, fat 21.6 g, protein 23.2 g, water 50.4 g, sodium 1390 mg

What a real portion looks like

• In the US survey database one slice of cooked Canadian bacon is counted as 23 g. — FNDDS 22501010 (Canadian bacon, cooked) (n = -) Evidence E source
  1 slice 23 g; 1 oz cooked 28 g; unspecified quantity 46 g

What your body absorbs

• In a randomized crossover trial of 12 volunteers, urinary syringol sulfates from wood smoke rose at 2 and 12 hours after eating smoked bacon or hot dog. — 12 volunteers eating bacon, salami and hot dog over 3 consecutive days each (n = 12) Evidence B source
  Syringol sulfates increased in urine at 2 h and 12 h after smoked meat

What cooking and storage change

• By the USDA retention table for Pork Products, broiling or frying bacon keeps about 45% of its thiamin and 90% of its sodium. — USDA R6 method 1456 BACON,BROILED/FRIED (Pork Products) (n = -) Evidence E source
  Retained: thiamin 45%, iron 80%, potassium 85%, sodium 90%, niacin 90%, B12 90%, zinc 100%
• In US processor data, five raw bacon samples exceeded 4-log CFU/g of Clostridium perfringens, while no cooked sample exceeded 2-log. — Raw chicken, not-ready-to-eat bacon and 3141 cooked products from three US processors (n = 3141) Evidence C source
  5 bacon samples >4-log CFU/g; cooked products all <=2-log CFU/g

What it does to your health

• In a crossover RCT of 25 young adults, rises in glucose and insulin were 44% lower after an energy-matched salmon burger meal than after a hamburger, bacon and cola meal. — 25 healthy normal-weight and overweight adults aged 21-39, single test meals (n = 25) Evidence B source
  Postprandial glucose and insulin increases 44% lower after the salmonburger meal (P<0.001, P=0.003)
• An umbrella review of cohort meta-analyses linked two slices of bacon a day with about twice the incidence of type 2 diabetes (HR 2.07). — Meta-analyses of prospective cohorts in adults, 53 publications (n = 53 publications) Evidence C source
  Bacon per two slices/day HR 2.07 (95% CI 1.40 to 3.05); processed meat per 50 g/day HR 1.37 (1.22 to 1.54)

Safety, limits and interactions

• A meta-analysis of 12 cohort and 30 case-control studies linked bacon intake with a higher gastric cancer risk (RR 1.37). — 42 observational studies (n = 42 studies) Evidence C source
  Bacon RR 1.37 (95% CI 1.17-1.61); processed meat RR 1.45 (1.26-1.65)
• An umbrella analysis of 137 associations rated bacon as one of only 2 gastric cancer risk factors with strong epidemiologic evidence. — 76 meta-analyses of observational studies (n = 137 associations) Evidence C source
  Bacon among 10 associations with strong evidence (2 risk factors: waist circumference, bacon)

Who this works differently for

• In 582 hemodialysis patients, eating bacon predicted greater overhydration between sessions, independent of age, sex and diabetes. — 582 patients from 37 Portuguese hemodialysis centers (n = 582) Evidence C source
  Bacon intake predicted greater hyperhydration (direction only in abstract)

What is still unknown

• Researchers note that measuring intake of individual processed meats such as bacon in population studies remains hard, which led a 12-person crossover trial to seek urine biomarkers. — 12 volunteers in crossover trial; 474 EPIC participants (n = 12) Evidence B source
  Estimation of intake of specific processed meats remains challenging

The bottom line

Salt is the number to know. Across 69 USDA samples, cooked restaurant bacon averaged 1830 mg of sodium per 3.5 oz (100 g), ranging from 1280 to 2590 mg. Cooking concentrates it. In UK tables, grilling back bacon takes it from 215 to 287 calories and from 1140 to 1390 mg of sodium per 3.5 oz (100 g), because water cooks out and nothing is added. By USDA retention factors dating from the 1970s, broiled or fried bacon keeps about 90 percent of its sodium and 45 percent of its thiamin. The US survey counts a slice of cooked Canadian bacon as 23 g, and we have no composition card for Canadian bacon itself. Who should be careful. The gastric cancer link is the firmest point in the safety data. An umbrella analysis of 137 associations from 76 meta-analyses counted bacon as one of only 2 gastric cancer risk factors with strong epidemiologic evidence, without an effect size in its abstract. People on hemodialysis are a second group. Among 582 patients in 37 Portuguese centers, eating bacon predicted greater fluid overload between sessions, an observational link whose size the abstract does not report. Raw bacon needs cooking. Five raw bacon samples in US processor data carried more than 4-log CFU/g of Clostridium perfringens, and no cooked product in the same data exceeded 2-log. We have no card on pregnancy, children or drug interactions. Smoked bacon leaves a trace you can measure. In a crossover trial of 12 volunteers, sulfate compounds from wood smoke rose in urine 2 and 12 hours after smoked bacon or hot dog. That is a marker of having eaten it, with no health outcome attached. The researchers built the test because population studies still struggle to tell one processed meat from another.

Sources

1. bcb-daily-r7-01 · Food composition dataset
   Pork, cured, bacon, cooked, restaurant | Sodium, Na 1830.0 mg (range 1280.0-2590.0, 69 samples) | Total lipid (fat) 36.5 g (range 25.8-47.9, 69 samples) | Protein 40.9 g (range 31.8-55.0)
   USDA FoodData Central, Foundation Foods, release 2026-04-30 · checked 2026-10-02
2. bcb-daily-r7-02 · Food composition dataset
   Bacon rashers, back, raw | CoFID 19-497 | per 100 g: energy 215 kcal, fat 16.5 g, protein 16.5 g, water 63.9 g, sodium 1140 mg | Bacon rashers, back, grilled | CoFID 19-500 | per 100 g: energy 287 kcal, fat 21.6 g, protein 23.2 g, water 50.4 g, sodium 1390 mg
   CoFID 2021, Public Health England (OGL v3.0) · checked 2026-10-02
3. bcb-daily-r7-04 · Food composition dataset
   Canadian bacon, cooked | FNDDS 22501010 | 1 slice: 23 g | 1 oz, cooked: 28 g | Quantity not specified: 46 g
   USDA FNDDS 2021-2023 (FoodData Central survey foods) · checked 2026-10-02
4. bcb-daily-r7-05 · Randomized crossover trial
   An untargeted, multi-tiered metabolomics approach based on LC-MS was applied to 33 meat products digested in vitro and secondly to urine and plasma samples from a randomized crossover dietary intervention in which 12 volunteers consumed successively 3 processed meat products (bacon, salami, and hot dog) and 2 other foods used as controls, over 3 consecutive days. ... The same compounds present as sulfate esters in urine increased at 2 and 12 h after consumption of smoked meat products (hot dog, bacon) in the intervention study.
   Am J Clin Nutr, 2019 · checked 2026-10-02
5. bcb-daily-r7-03 · Food composition dataset
   BACON,BROILED/FRIED | Pork Products | USDA-RETN-R6:1456 | thiamin 45% | iron 80% | potassium 85% | sodium 90% | niacin 90% | vitamin B12 90% | zinc 100%
   USDA Table of Nutrient Retention Factors, Release 6 (2007), code 1456 · checked 2026-10-02
6. bcb-daily-r7-10 · Prevalence survey
   Although five bacon (not RTE) samples exceeded 4-log CFU/g C. perfringens, none of the cooked samples (regardless of process deviations association) exceeded 2-log CFU/g, suggesting that the high initial levels in the raw product were vegetative cells which were eliminated during the cooking process and therefore would not grow during cooling.
   J Food Prot, 2026 · checked 2026-10-02
7. bcb-daily-r7-06 · Randomized crossover trial
   Twenty-five healthy normal (n = 12) and overweight (n = 13) volunteers (21-39 years) participated in this randomized, dietary cross-over study and received two test meals (matched in energy and energy giving nutrients) after an overnight fast with 1 week between test days. The conventional fast-food meal was a hamburger meal (hamburger, bacon, cola drink, calculated glycemic load = 48.7) ... RESULTS: Postprandial increases in glucose and insulin were 44% lower after the unconventional meal (P<0.001 and P = 0.003, respectively).
   Eur J Clin Nutr, 2012 · checked 2026-10-02
8. bcb-daily-r7-07 · Umbrella review (observational)
   Quality of evidence was also high for the association for increased incidence of type 2 diabetes with higher intake of red meat (for an increment of 100 g/day, 1.17 (1.08 to 1.26)), processed meat (for an increment of 50 g/day, 1.37 (1.22 to 1.54)), bacon (per two slices/day, 2.07 (1.40 to 3.05)), and sugar sweetened beverages (for an increase of one serving/day, 1.26 (1.11 to 1.43)).
   BMJ, 2019 · checked 2026-10-02
9. bcb-daily-r7-08 · Meta-analysis (observational)
   Twelve cohort and thirty case-control studies were included in the meta-analysis. ... Positive findings were also existed in the items of beef (RR: 1.28, 95% CI: 1.04-1.57), bacon (RR: 1.37, 95% CI: 1.17-1.61), ham (RR: 1.44, 95% CI: 1.00-2.06), and sausage (RR: 1.33, 95% CI: 1.16-1.52).
   PLoS One, 2013 · checked 2026-10-02
10. bcb-daily-r7-09 · Umbrella review (observational)
    A total of 137 associations were examined in 76 articles. ... Only 10 associations had strong epidemiologic evidence, including 2 risk factors (waist circumference and bacon), and 8 protective factors
    Front Public Health, 2022 · checked 2026-10-02
11. bcb-daily-r7-11 · Observational cohort
    This observational, longitudinal study includes 582 patients from 37 Portuguese HD centers. ... Consumption of bacon, savory snacks, carrots, bell peppers, cherries, and soup predicted greater hyperhydration, while rice, cookies, and grapes show the opposite effect, regardless of age, sex, diabetes, and HD duration.
    Clin Nutr ESPEN, 2026 · checked 2026-10-02
12. bcb-daily-r7-12 · Randomized crossover trial
    Processed meat intake is associated with a higher risk of colorectal and stomach cancers, coronary artery disease, and type 2 diabetes and with higher mortality, but the estimation of intake of different processed meat products in this heterogeneous food group in epidemiological studies remains challenging.
    Am J Clin Nutr, 2019 · checked 2026-10-02