# Canola Seed Oil (Brassica napus)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/canola-seed-oil
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-04
**Evidence Score:** 2 / 10
**Category:** Seed Oils
**Also Known As:** rapeseed oil (low erucic acid), LEAR oil, double-zero rapeseed oil, 00-rapeseed oil, Canadian oil, low erucic acid rapeseed oil, Brassica napus oil, double-low rapeseed oil

## Overview

Canola seed oil (Brassica napus) is a vegetable oil rich in oleic acid (approximately 60%) and linoleic acid (approximately 20%), alongside alpha-linolenic acid (ALA), an omega-3 fatty acid. Its proposed health effects center on these unsaturated fatty acids modulating [inflammatory pathway](/ingredients/condition/inflammation)s and lipid [metabolism](/ingredients/condition/weight-management), though direct clinical trials on canola oil as a supplement remain limited.

## Health Benefits

• No clinical evidence available - research focuses only on extraction methods and composition
• Potential [anti-inflammatory](/ingredients/condition/inflammation) effects suggested by unsaturated fatty acid content (60-70% oleic and linoleic acids) but not clinically studied
• Possible [antioxidant](/ingredients/condition/antioxidant) properties from tocopherols and phenolic compounds (sinapic acid, canolol) remain theoretical
• May support [cardiovascular health](/ingredients/condition/heart-health) through lipid modulation based on fatty acid profile, but lacks human trials
• Food-grade safety established for low-erucic varieties (<2%), unlike traditional high-erucic rapeseed

## Mechanism of Action

Oleic acid in canola oil activates peroxisome proliferator-activated receptor alpha (PPAR-α), which downregulates NF-κB-mediated [inflammatory](/ingredients/condition/inflammation) gene expression and supports fatty acid oxidation. Alpha-linolenic acid (ALA, 18:3n-3) serves as a precursor to eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are incorporated into cell membrane phospholipids and compete with arachidonic acid for COX and LOX enzyme activity, reducing pro-inflammatory eicosanoid synthesis. Tocopherols (vitamin E isomers) and polyphenolic compounds present in unrefined canola oil act as [free radical scaveng](/ingredients/condition/antioxidant)ers, inhibiting lipid peroxidation via hydrogen atom transfer to peroxyl radicals.

## Clinical Summary

Clinical research on canola oil has focused primarily on dietary substitution studies rather than supplementation trials; a 2011 randomized controlled trial (n=121) published in Nutrition, [Metabolism](/ingredients/condition/weight-management) and Cardiovascular Diseases found that replacing saturated fats with canola oil reduced LDL cholesterol by approximately 7% over 4 weeks. A meta-analysis of plant-based oils suggested ALA-rich oils like canola modestly reduce [cardiovascular risk](/ingredients/condition/heart-health) markers, but effect sizes were small and confounded by overall dietary patterns. No dedicated clinical trials have examined canola seed oil in encapsulated supplement form with standardized dosing, and evidence for [anti-inflammatory](/ingredients/condition/inflammation) or [antioxidant](/ingredients/condition/antioxidant) outcomes in humans specifically from canola oil is largely inferential. Overall, the evidence base is rated as weak-to-moderate for cardiovascular lipid effects and insufficient for all other purported benefits.

## Nutritional Profile

Per 100 mL of refined canola seed oil: ~884 kcal, 100 g total fat, 0 g protein, 0 g carbohydrates, 0 g fiber. Fatty acid composition: oleic acid (C18:1 ω-9) 56–65%, linoleic acid (C18:2 ω-6) 18–22%, α-linolenic acid (C18:3 ω-3) 8–12%, palmitic acid (C16:0) 3.5–5%, stearic acid (C18:0) 1–2.5%, erucic acid (C22:1) <2% (low-erucic cultivars). Favorable ω-6:ω-3 ratio of approximately 2:1. Tocopherols (vitamin E family): total 60–120 mg/100 g, predominantly α-tocopherol (~20–35 mg/100 g) and γ-tocopherol (~30–60 mg/100 g), with minor δ-tocopherol (~1–3 mg/100 g). Vitamin K₁ (phylloquinone): ~70–75 µg/100 g. Phytosterols: total 500–900 mg/100 g, primarily β-sitosterol (~350–500 mg), campesterol (~150–300 mg), and brassicasterol (~50–100 mg); phytosterols have relatively low bioavailability (~0.5–5% absorption) but competitively inhibit intestinal cholesterol absorption. Phenolic compounds (in cold-pressed/virgin canola oil): sinapic acid (~5–20 mg/100 g), canolol (vinyl syringol, a sinapic acid decarboxylation product, ~20–80 mg/100 g in roasted-seed pressed oil, negligible in fully refined oil), sinapine traces. Carotenoids: minor amounts of lutein and β-carotene (~1–3 mg/100 g in crude oil, largely removed during refining). Chlorophyll pigments: up to 5–35 ppm in crude oil, reduced to <0.025 ppm after refining. Contains no cholesterol. Trace minerals are negligible after refining. Phospholipids (lecithin): ~1–3% in crude oil, removed during degumming. Bioavailability notes: fat-soluble vitamins (E, K₁) are highly bioavailable when consumed with the oil matrix; α-linolenic acid conversion to EPA is limited (~5–10%) and to DHA is very low (<1%) in humans; oleic acid is well absorbed (>95%). Smoke point of refined canola oil: ~204–230 °C (400–446 °F), supporting stability for moderate- to high-heat cooking with minimal degradation of tocopherols at typical culinary temperatures.

## Dosage & Preparation

No clinically studied dosage ranges are available as no human trials have been conducted. Commercial canola oil is typically unstandardized for bioactive compounds beyond fatty acid profiles. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Canola oil is generally recognized as safe (GRAS) by the FDA at typical dietary consumption levels, and adverse effects are rare; individuals with Brassica family (cruciferous vegetable) allergies should exercise caution due to potential cross-reactivity. Erucic acid, a fatty acid historically present in rapeseed oil, has been reduced to less than 2% in modern canola cultivars through selective breeding, minimizing myocardial lipidosis risk observed in animal studies. Canola oil may have an additive effect with anticoagulant medications such as warfarin due to its vitamin K and omega-3 content, potentially altering INR values, though this interaction is theoretical at supplemental doses. Pregnant and breastfeeding women consuming canola oil at dietary levels face no established risk, but high-dose supplementation lacks safety data and is not recommended.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses on canola seed oil for biomedical applications were found in the research. The available literature focuses exclusively on extraction methods and chemical composition rather than clinical outcomes.

## Historical & Cultural Context

No historical or traditional medicinal uses of canola seed oil are documented. Canola itself emerged in the 1970s through Canadian breeding programs to develop low-erucic acid varieties from traditional rapeseed, lacking any pre-modern traditional context.

## Synergistic Combinations

Omega-3 fatty acids, vitamin E, plant sterols, olive oil, flaxseed oil

## Frequently Asked Questions

### How much omega-3 does canola oil contain?

Canola oil contains approximately 9-11% alpha-linolenic acid (ALA, 18:3n-3) by weight, making it one of the richer plant-based sources of omega-3 fatty acids among common cooking oils. However, the conversion of ALA to the more biologically active EPA and DHA in the human body is inefficient, estimated at less than 5-10% for EPA and under 1% for DHA, so canola oil is not a reliable substitute for marine omega-3 sources.

### Is canola oil anti-inflammatory?

Canola oil's high unsaturated fatty acid content — particularly oleic acid and ALA — theoretically supports anti-inflammatory pathways by reducing arachidonic acid competition at COX and LOX enzymes and activating PPAR-α to suppress NF-κB signaling. However, no clinical trials have directly measured inflammatory biomarkers such as CRP, IL-6, or TNF-α in response to canola oil supplementation specifically, so its anti-inflammatory effect in humans remains unconfirmed.

### Does canola oil lower cholesterol?

Dietary intervention studies suggest canola oil can reduce LDL cholesterol by approximately 5-10% when substituted for saturated fat sources, an effect attributed primarily to its high oleic acid content (≈60%) which reduces hepatic VLDL synthesis and upregulates LDL receptor expression. These findings come from short-term trials of 4-8 weeks with sample sizes generally under 200 participants, so long-term effects and effects in supplemental (non-dietary) form are not established.

### What is the difference between canola oil and rapeseed oil?

Canola oil is derived from specially bred low-erucic-acid varieties of Brassica napus (rapeseed), with erucic acid content legally required to be below 2% in Canada and the EU, compared to 20-50% in traditional rapeseed oil. High erucic acid intake was associated with myocardial lipidosis and heart lesions in animal studies, which led to the development of modern canola cultivars through selective breeding in the 1970s; the name 'canola' is derived from 'Canadian oil, low acid.'

### Are there any drug interactions with canola oil supplements?

Canola oil contains both vitamin K and omega-3 fatty acids (ALA), which can theoretically interact with anticoagulant drugs like warfarin (Coumadin) — vitamin K promotes clotting factor synthesis while omega-3s have mild antiplatelet effects, creating opposing and unpredictable influences on INR levels. Additionally, high-dose omega-3 intake from any source may potentiate the effects of antiplatelet medications such as aspirin or clopidogrel; individuals on these medications should consult a healthcare provider before taking canola oil in supplement quantities above standard dietary intake.

### What is the best form of canola oil supplement — liquid, softgel, or capsule?

Canola oil is most commonly available as a liquid oil or in softgel capsules, with softgels offering convenient dosing and reduced oxidation compared to liquid storage. The liquid form may have better bioavailability since it doesn't require the capsule to dissolve, though softgels provide easier portion control and shelf stability. Both forms should be stored in cool, dark conditions to preserve the heat-sensitive tocopherols and phenolic compounds present in the oil.

### Is canola oil safe for children and pregnant women to take as a supplement?

While canola oil is generally recognized as safe in food amounts, clinical safety data for supplement use during pregnancy and in children is not available. Pregnant women and parents should consult healthcare providers before giving canola oil supplements, as adequate omega-3 and omega-6 intake can typically be met through dietary sources like fish, flaxseeds, and nuts. Whole food sources are typically recommended over supplements for these populations.

### Can I get enough canola oil benefits from eating canola-based foods instead of taking supplements?

Canola oil is widely used in cooking oils, margarine, and processed foods, making it easy to obtain adequate amounts through diet alone in most Western populations. However, supplement forms may provide concentrated doses of the phytochemical compounds like sinapic acid and canolol that are studied for potential antioxidant effects, though these benefits remain theoretical without clinical evidence. For most people seeking cardiovascular support, incorporating canola oil in cooking or consuming other omega-3 rich sources like fatty fish is a more evidence-based approach than supplementation.

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