Vegetable oil: modest cholesterol drops, and no support for the seed oil scare

In a meta-analysis of 27 randomized trials with 1359 people, canola oil lowered total cholesterol by 7.2 mg/dl and LDL by 6.4 mg/dl, with no effect on HDL or triglycerides. Canola stands in here for one kind of vegetable oil, and the trials compared it against different fats. An umbrella review of 206 meta-analyses found the same direction for canola, virgin olive and rice bran oil. It also found coconut and palm oil raised total and LDL cholesterol, and it rated all of this moderate to very low certainty. UK tables put an average vegetable oil at 899 calories per 3.5 oz (100 g), with 59.3 g monounsaturated and 6.6 g saturated fat. That is one averaged figure across very different oils. The USDA records in the table below are three specific oils, canola, soybean and palm kernel, and none of them is an average. A tablespoon weighs 14 g.

The numbers, per 3.5 oz (100 g)

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

How much is actually in it

• UK composition tables list average vegetable oil at 99.9 g fat and 899 calories per 3.5 oz (100 g), with 59.3 g monounsaturated, 29.3 g polyunsaturated and 6.6 g saturated fat. — food composition record, UK retail average Evidence E source
  Per 100 g: fat 99.9 g; MUFA 59.3 g; PUFA 29.3 g; SFA 6.6 g; trans trace

What a real portion looks like

• The US dietary survey database counts one tablespoon of vegetable oil as 14 g and one cup as 224 g. — FNDDS portion weights, US Evidence E source
  1 tbsp = 14 g; 1 cup = 224 g; quantity not specified = 14 g

What your body absorbs

• In a randomized crossover trial in 12 women, salad absorption of carotenoids and fat-soluble vitamins rose with soybean oil in the dressing and was highest at 32 g oil. — 12 women, 5 salads with 0, 2, 4, 8 or 32 g soybean oil (n = 12) Evidence B source
  Linear dose response for alpha-carotene, lycopene, phylloquinone and retinyl palmitate across 0-32 g; highest absorption with 32 g (P < 0.002); some individuals showed negligible response

What cooking and storage change

• A systematic review of 23 publications found the idea that frying foods is generally linked to higher cardiovascular risk is not supported, though high fried-food intake probably relates to weight gain. — 23 publications on vegetable oil and fried food intake (n = 23 publications) Evidence C source
  No general association of frying with CVD; probable link of high fried-food intake with weight gain
• A systematic review found processing contaminants MCPD esters and glycidyl esters in infant formula come from the vegetable oils used, with high levels when much palm oil is used. — infant formulas Evidence C source
  Occurrence depends fully on the oil; highest with palm oils or fats; mitigation must happen at oil refining

What it does to your health

• A meta-analysis of 27 randomized trials with 1359 people found canola oil lowered total cholesterol by about 7.2 mg/dl and LDL by about 6.4 mg/dl, with no effect on HDL or triglycerides. — 27 RCTs, 1359 participants (n = 1359) Evidence A source
  TC -7.24 mg/dl (95% CI -12.1 to -2.7); LDL -6.4 mg/dl (95% CI -10.8 to -2); no effect on HDL, TG, Apo B, Apo A1
• An umbrella review of 48 reviews covering 206 meta-analyses found oils rich in unsaturated fat lowered total and LDL cholesterol, while coconut and palm oil raised them, at moderate to very low certainty. — adults; 48 systematic reviews, 206 meta-analyses (n = 206 meta-analyses) Evidence A source
  Canola, virgin olive and rice bran oil lower TC and LDL; coconut and palm oil raise TC, LDL and HDL; GRADE moderate to very low

Safety, limits and interactions

• A meta-analysis of peanut oil samples found aflatoxins in about half of them, with a margin of exposure below 10,000 for US children. — peanut oil samples, studies 2005-2022; exposure modeled for adults and children Evidence C source
  Overall aflatoxin prevalence 49.30% (95% CI 35.80-62.84%); pooled AFB1 2.30 ug/kg; MOE < 10,000 for adults in Ethiopia, Sudan, USA and children in USA

What people believe that the data does not support

• The EU refused a claim that swapping usual vegetable oil for DAG oil helps weight loss. — EU health claim register Evidence E source
  Status Non-authorized
• US rules allow a heart disease claim only for foods adding at least 1.3 g per day of vegetable oil sterol esters, not for vegetable oil itself. — US food labeling Evidence E source
  Authorized model claim threshold 1.3 g/day sterol esters in two meals
• A 2026 scoping review of human studies found claims that seed oils and linoleic acid harm the heart or raise inflammation lack scientific foundation. — human clinical and observational literature Evidence C source
  Harm claims about linoleic acid, inflammation, oxidative stress and manufacturing by-products not supported

What is still unknown

• A systematic review of fortified vegetable oils found vitamin A fortification made little to no difference to serum retinol in two trials with 514 people. — general population, any age; 2 RCTs, 514 participants (n = 514) Evidence A source
  MD 0.35 umol/L (95% CI -0.43 to 1.12), low-certainty evidence

The bottom line

A little oil on a salad changes what you absorb from it. In a small crossover trial in 12 women, absorption of carotenoids and fat-soluble vitamins from salad rose with the soybean oil in the dressing, from none up to 32 g, and some women barely responded. A 2015 systematic review of 23 mostly observational publications found the idea that frying is generally tied to heart disease unsupported. It judged that eating a lot of fried food is probably linked to weight gain. The claim that seed oils and their linoleic acid inflame the body and harm the heart was checked in a 2026 scoping review of human studies. The review found those harm claims without foundation, and the same for worries about by-products of manufacturing. It was a narrative review with no pooled numbers. Two label rules are narrower than they sound. The US heart disease claim applies to foods adding at least 1.3 g a day of vegetable oil sterol esters across two meals, it does not cover plain oil, and a permitted claim says nothing about the size of any effect. The EU refused a weight loss claim for swapping your usual oil for DAG oil. The cautions we have are about contamination in particular oils. A meta-analysis of peanut oil samples from studies between 2005 and 2022 found aflatoxins in about half of them (49%, 95% CI 36 to 63%), and the abstract did not separate refined from unrefined oil. The margin of exposure fell below 10,000 for adults in Ethiopia, Sudan and the United States and for US children, which the authors read as a considerable health risk. In infant formula, a systematic review traced the processing contaminants MCPD esters and glycidyl esters to the vegetable oils in the recipe, with high levels when much palm oil is used. That review did not assess what those levels do to babies. We have no card on allergy or on medicines. Adding vitamin A to cooking oil made little or no difference to blood retinol in two trials with 514 people, at low certainty.

Compared with other foods

Sources

1. vgo-r6-01 · food composition dataset
   CoFID 17-686 Oil, vegetable, average (group OC): Fat 99.9 g; Energy 899 kcal; Mono FA /100g food 59.30 g; Poly FA /100g food 29.30 g; Satd FA /100g fd 6.60 g; Trans FAs /100g food Tr
   CoFID 2021 (Public Health England), code 17-686 Oil, vegetable, average · checked 2026-09-29
2. vgo-r6-02 · portion dataset
   Vegetable oil, NFS | FNDDS 82101000 | fdc_id 2710180 | 1 cup 224 g | 1 tablespoon 14 g | Quantity not specified 14 g
   USDA FNDDS, Vegetable oil, NFS, food code 82101000 (fdc_id 2710180) · checked 2026-09-29
3. vgo-r6-03 · randomized crossover trial
   Women (n = 12) each consumed 5 vegetable salads with salad dressings containing 0, 2, 4, 8, or 32 g soybean oil. ... Absorption of all carotenoids and fat-soluble vitamins was highest with 32 g oil (P < 0.002).
   Am J Clin Nutr, 2017 · checked 2026-09-29
4. vgo-r6-06 · systematic review
   we conclude that (1) the myth that frying foods is generally associated with a higher risk of CVD is not supported by the available evidence; ... (3) high consumption of fried foods is probably related to a higher risk of weight gain, though the type of oil may perhaps modify this association.
   Br J Nutr, 2015 · checked 2026-09-29
5. vgo-r6-08 · systematic review
   The occurrence of MCPDEs and GEs in infant formula fully depends on the vegetable oils used in the recipe. High levels of these contaminants can be found when relatively high amounts of palm oils or fats are used.
   Compr Rev Food Sci Food Saf, 2021 · checked 2026-09-29
6. vgo-r6-04 · meta-analysis of RCTs
   Twenty-seven trials, comprising 1359 participants, met the eligibility criteria. Results of this study showed that CO consumption significantly reduced TC (-7.24 mg/dl, 95% CI, -12.1 to -2.7), and LDL (-6.4 mg/dl, 95% CI, -10.8 to -2), although it had no effects on HDL, TG, Apo B, and Apo A1.
   J Am Coll Nutr, 2019 · checked 2026-09-29
7. vgo-r6-05 · umbrella review
   A total of 48 studies, including 206 meta-analyses, were included. Moderate to very low certainty evidence showed that monounsaturated and polyunsaturated fatty acids such as canola oil, virgin olive oil, and rice bran oil are beneficial in reducing serum total cholesterol and low-density lipoprotein (LDL) concentrations. Conversely, low to very low certainty evidence suggests that oils high in saturated fats, such as coconut oil and palm oil, increase total cholesterol and LDL concentrations but also raise high-density lipoprotein concentrations.
   Adv Nutr, 2024 · checked 2026-09-29
8. vgo-r6-07 · meta-analysis of occurrence data
   The Overall prevalence of AFTs was 49.30%, 95%CI (35.80-62.84%). ... Therefore, adults consumers were in considerable health risk in Ethiopia, Sudan and USA and for children in USA (MOE < 10,000).
   Rev Environ Health, 2023 · checked 2026-09-29
9. vgo-r6-10 · regulatory decision
   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 2026-09-29
10. vgo-r6-11 · regulation
    Diets low in saturated fat and cholesterol that include two servings of foods that provide a daily total of at least 1.3 g of vegetable oil sterol esters in two meals may reduce the risk of heart disease.
    21 CFR 101.83, Health claims: plant sterol/stanol esters and CHD · checked 2026-09-29
11. vgo-r6-12 · 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. Concerns that the manufacture of seed oils leads to the creation of harmful substances, were also found to lack support.
    Crit Rev Food Sci Nutr, 2026 · checked 2026-09-29
12. vgo-r6-09 · systematic review and 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 2026-09-29