Canola oil and vegetable oil: small differences, little support for the fears

Of the two names on the shelf, canola is the one with a trial record, and the effects in it are small. An umbrella review of 48 systematic reviews found that canola, virgin olive and rice bran oil lowered total cholesterol by between 4.3 and 33 mg/dL (0.11 and 0.86 mmol/L) compared with other vegetable oils, while coconut, olive and palm oil raised it by 7.3 to 15 mg/dL (0.19 to 0.40 mmol/L). That range is shared by three oils, so canola alone cannot be pinned to one number. A meta-analysis of 32 randomized trials found canola lowered BMI by 0.13 kg/m2 against other oils and moved waist-to-hip ratio up by 0.003, with no effect on other body measures. Neither change is one you would see in a mirror. Generic vegetable oil has no trials of its own in our material, and we found none comparing it with canola directly. The worry about seed oils has been looked at in a narrative review, without pooled numbers. A 2026 scoping review of clinical and observational studies found claims that linoleic acid raises inflammation, oxidative stress and therefore heart risk to be without foundation.

How much is actually in it

• UK data list average vegetable oil at 899 calories and 99.9 g fat per 3.5 oz (100 g), of which 59.3 g monounsaturated, 29.3 g polyunsaturated and 6.6 g saturated. — UK average vegetable oil Evidence E source
  Per 100 g: 899 calories; MUFA 59.3 g; PUFA 29.3 g; SFA 6.6 g

What a real portion looks like

• USDA survey data weigh one tablespoon of canola oil or generic vegetable oil at 14 g, the default portion when amount is not stated. — US dietary survey portion weights Evidence E source
  1 tablespoon 14 g; 1 cup 224 g (both oils)

What cooking and storage change

• A systematic review of 23 studies found no support for the idea that frying with vegetable oils generally raises heart disease risk, though eating fried foods often was probably linked to weight gain. — 23 publications on vegetable oil, frying and chronic disease (n = 23 studies) Evidence C source
  No general frying-CVD link; probable link of high fried food intake with weight gain
• A systematic review of canned fish found that packing in omega-6 rich oils such as sunflower or soybean lowered the omega-3 to omega-6 ratio of the fish flesh, while brine kept it better. — 20 food chemistry studies of canned fish, storage up to 5 years (n = 20 studies) Evidence D source
  N-3/n-6 ratio lowered by n-6 rich oils; brine and tomato sauce preserved it

What it does to your health

• According to a meta-analysis of 32 RCTs, canola oil compared with other dietary oils lowered BMI by 0.13 kg/m2 and raised waist-to-hip ratio by a negligible 0.003, with no effect on other body measures. — Adults in 32 randomized trials comparing canola oil with other oils, searched to September 2024 (n = 32 RCTs) Evidence A source
  BMI MD -0.127 kg/m2 (95% CI -0.231 to -0.024); WHR MD 0.003 (95% CI 0.001 to 0.005)
• According to an umbrella review of 48 systematic reviews, canola, virgin olive and rice bran oil lowered total cholesterol by between 4.3 and 33 mg/dL (0.11 and 0.86 mmol/L) compared with other vegetable oils, while coconut, olive and palm oil raised it. — Adults in meta-analyses of vegetable oil intake; 48 reviews, 206 meta-analyses (n = 48 reviews) Evidence A source
  TC lower by 0.11-0.86 mmol/L (canola, virgin olive, rice bran) vs other oils; coconut, olive, palm raised TC by 0.19-0.40 mmol/L

What people believe that the data does not support

• A 2026 scoping review of clinical and observational data found claims that linoleic acid raises inflammation and oxidative stress, and therefore heart risk, to be without foundation. — Human clinical and observational studies on seed oils and linoleic acid Evidence C source
  Harm claims about linoleic acid (inflammation, oxidative stress, CVD) found without foundation
• The EU refused to authorize the claim that replacing usual vegetable oil with DAG oil helps weight loss. — EU health claim assessment Evidence E source
  Claim non-authorized

Who this works differently for

• According to a meta-analysis of 2 RCTs with 514 participants, vegetable oils fortified with vitamin A made little to no difference to serum retinol. — General population in trials of vitamin A or D fortified vegetable oils and fats (n = 514) Evidence A source
  Serum retinol MD 0.35 umol/L (95% CI -0.43 to 1.12), low certainty
• Observational data from Iran link higher intake of liquid non-hydrogenated vegetable oil with 63% lower odds of premature coronary artery disease. — 2459 Iranian adults (men <55, women <65) referred for angiography, IPAD study (n = 2459) Evidence C source
  OR 0.37 (95% CI 0.29-0.46); no link for hydrogenated oil

The bottom line

UK data put an average vegetable oil at 899 calories and 99.9 g fat per 3.5 oz (100 g), of which 59.3 g is monounsaturated, 29.3 g polyunsaturated and 6.6 g saturated. That is a British average, and we have no matching figure for canola alone. USDA weighs a tablespoon of either oil at 14 g. Frying gets its own myth. A systematic review of 23 studies, mostly observational and without pooled numbers, concluded that the idea of frying generally raising heart disease risk is not supported by the evidence. The same review judged that eating fried foods often was probably linked to weight gain. In a case-control study of 2,459 Iranian adults sent for angiography, a higher intake of liquid non-hydrogenated vegetable oil went with lower odds of early coronary artery disease (OR 0.37, 95% CI 0.29 to 0.46). Diet came from a questionnaire, and odds in a case-control design are not a measured fall in risk. Oil sold with added vitamin A did not raise blood retinol in a meta-analysis of 2 randomized trials with 514 participants (0.35 umol/L, 95% CI -0.43 to 1.12), at low certainty. Fish canned in sunflower or soybean oil ends up with a lower omega-3 to omega-6 ratio in the flesh than fish canned in brine, according to a review of 20 food chemistry studies that measured the product and not the people eating it. The EU refused a claim that replacing your usual vegetable oil with diacylglycerol oil helps weight loss. We found no evidence on allergy, pregnancy, children or medicines for either oil, so this page has no safety section.

Sources

1. cvo-daily-r2-08 · dataset
   Oil, vegetable, average (17-686): Energy 899 kcal; Fat 99.9 g; Mono FA 59.30 g; Poly FA 29.30 g; Satd FA 6.60 g per 100 g food
   CoFID 2021 (Public Health England), code 17-686 Oil, vegetable, average · checked 2026-10-01
2. cvo-daily-r2-09 · dataset
   Canola oil: 1 tablespoon 14 g; 1 cup 224 g. Vegetable oil, NFS: 1 tablespoon 14 g; 1 cup 224 g
   USDA FNDDS 2021-2023, food codes 82105500 (Canola oil) and 82101000 (Vegetable oil, NFS) · checked 2026-10-01
3. cvo-daily-r2-04 · systematic review
   the myth that frying foods is generally associated with a higher risk of CVD is not supported by the available evidence
   Br J Nutr, 2015 · checked 2026-10-01
4. cvo-daily-r2-07 · systematic review
   The use of n-6 FA-rich oils (sunflower, soybean) lowered the n-3/n-6 ratio in flesh. Conversely, aqueous media (brine) and tomato sauce maintained better ratios.
   Mar Drugs, 2026 · checked 2026-10-01
5. cvo-daily-r2-01 · meta-analysis of RCTs
   CO consumption significantly increased WHR (MD: 0.003 cm, 95% CI: 0.001, 0.005, P value: 0.003) and significantly decreased BMI (mean difference (MD): -0.127 kg/m2, 95% C: -0.231, -0.024, P value: 0.016) However, it did not significantly affect other anthropometric measures (P > 0.05).
   Nutr J, 2025 · checked 2026-10-01
6. cvo-daily-r2-02 · umbrella review
   Canola oil, virgin olive oil, and rice bran oil were found to significantly reduce serum TC between 0.86 mmol/L and 0.11 mmol/L compared to other vegetable oils (Table 2). Conversely, the use of coconut oil, olive oil, and palm oil increased serum TC significantly between 0.19 mmol/L and 0.40 mmol/L.
   Adv Nutr, 2024 · checked 2026-10-01
7. cvo-daily-r2-05 · scoping review
   Conversely, claims about harm, such as LA increases inflammation and oxidative stress, and therefore raises CVD risk, were found to be without foundation.
   Crit Rev Food Sci Nutr, 2026 · checked 2026-10-01
8. cvo-daily-r2-10 · regulatory register
   POL-HC-6223 Diacylglycerol (DAG) oil Substituting your usual vegetable oil with DAG oil helps in the management of body weight through weight loss -/- Non-authorised
   EU Register on nutrition and health claims, claim POL-HC-6223, snapshot 2026-09-21 · checked 2026-10-01
9. cvo-daily-r2-03 · meta-analysis
   Available evidence showed no significant effect of fortification with vitamin A on serum retinol levels (RCTs: MD 0.35 µmol/L, 95% CI -0.43 to 1.12; two trials; 514 participants; low-certainty evidence
   Nutrients, 2023 · checked 2026-10-01
10. cvo-daily-r2-06 · case-control
    A higher non-HVO intake was associated with a lower risk of PCAD in the fully adjusted model (odds ratio [OR]: 0.37; 95 % confidence interval [CI]: 0.29, 0.46).
    Nutr Metab Cardiovasc Dis, 2026 · checked 2026-10-01