Question/input: How are commercially produced oils produced and how do they differ from the best quality cold pressed oils?
Commercially produced vegetable oils—often called industrial seed oils (soybean, canola, corn, cottonseed, sunflower, and safflower)—are made through a highly industrialized process designed for maximum yield and shelf stability. These oils, which were not part of the human diet until the 20th century, are often refined, bleached, and deodorized, a process that strips them of nutrients and can create harmful byproducts
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How Commercially Produced Vegetable Oils Are Made
The production of industrial seed oils is an unnatural, multi-step process:
- Seed Gathering & Heating: Seeds (soy, corn, etc.) are gathered and heated to extremely high temperatures, causing the unsaturated fatty acids inside to oxidize and create harmful byproducts.
- Chemical Solvent Extraction: To maximize oil yield, manufacturers mix the heated seeds with a petroleum-based solvent, usually hexane. This dissolves the oil, which is then separated from the mixture.
- Refining & Degumming: The crude oil is refined with water or acids to remove “gums” (phospholipids) and other compounds.
- Bleaching: The oil is treated with bleaching clays (such as bentonite) to remove undesirable colours and pigments.
- Deodorization: Because extracted oil has an unpleasant smell, it is subjected to steam at high temperatures (up to 240°C/460°F) to remove odour. This step often results in the formation of trans fats.
- Additives: Synthetic antioxidants (like TBHQ, BHT, BHA) are sometimes added to preserve the oil’s shelf life, as it is highly unstable.
Why They Are Considered Harmful
Critics and researchers argue that the consumption of these processed oils contributes to chronic diseases through several mechanisms:
- Imbalanced Omega-6 to Omega-3 Ratio: Industrial seed oils are extremely high in omega-6 polyunsaturated fats (linoleic acid). While essential in small amounts, modern diets have massive surpluses of omega-6, which is linked to a pro-inflammatory state.
- Oxidation and Toxic Byproducts: Because these oils contain polyunsaturated fats, they are highly unstable and oxidize easily upon exposure to light, heat, or chemical processing. This produces lipid peroxides and trans fats, which damage cells and are linked to cardiovascular diseases and cancer.
- Repeated Heating (Rancidity): When vegetable oils are heated repeatedly, such as in restaurant deep-fryers, the amount of toxic aldehydes—compounds linked to Alzheimer’s and liver disease—increases significantly.
- Genetically Modified (GMO) Sources: In the U.S., the vast majority of soy, corn, and canola are genetically modified.
- High Presence in Ultra-Processed Foods: Vegetable oils are often considered a marker of ultra-processed food consumption, which is associated with weight gain, diabetes, and heart disease.
This is a powerful addition to your site. While “industrial seed oils” are often stripped of their benefits through chemical extraction and high heat,
cold-pressed oils are essentially “fresh fruit/seed juices” that retain their full biological integrity.
Here is a comprehensive breakdown for your new page on the benefits of cold-pressed oils.
- Cold-Pressed Rapeseed Oil: The “Gold Standard” for Balance
Often called “the olive oil of the North,” British cold-pressed rapeseed oil is one of the most balanced fats you can use.
- Near-Perfect Omega Ratio: It has a natural 2:1 ratio of Omega-6 to Omega-3. Most modern diets are dangerously high in Omega-6 (promoting inflammation); this oil helps pull that ratio back into a healthy, anti-inflammatory range.
- Lowest Saturated Fat: It contains roughly half the saturated fat of olive oil and the lowest of any culinary oil (around 6–7%).
- High Smoke Point (230°C): Unlike many unrefined oils, cold-pressed rapeseed is stable at high temperatures, making it safer for roasting and frying without the oil breaking down into harmful compounds.
- Vitamin E Powerhouse: It is naturally rich in Vitamin E, a major antioxidant that protects your cells from oxidative stress.
- Extra Virgin Olive Oil (EVOO): The Polyphenol King
If rapeseed oil is about balance, olive oil is about protection.
- Polyphenol Rich: EVOO contains unique compounds like oleocanthal and hydroxytyrosol that are powerful anti-inflammatories. These are largely destroyed in refined “light” olive oils.
- Monounsaturated Fats (MUFAs): It is roughly 75% oleic acid, which is highly resistant to oxidation and is the cornerstone of the heart-healthy Mediterranean diet.
- Gut Health: Research shows the polyphenols in EVOO act as a “prebiotic” for your gut microbiome, supporting beneficial bacteria.
- Extra Virgin Avocado Oil: The High-Heat Specialist
A relative newcomer but nutritionally excellent, especially for high-heat cooking.
- Extreme Heat Stability: With a smoke point of up to 255°C, it is arguably the safest choice for searing or high-temperature stir-frying.
- Lutein Content: It is one of the few oils rich in lutein, a carotenoid that is essential for eye health and protecting against macular degeneration.
- Nutrient Absorption: Adding avocado oil to salads can increase the absorption of alpha-carotene, beta-carotene, and lutein from the vegetables by up to 15 times.
Summary Comparison Table for Your Website
| Oil Type | Smoke Point | Primary Benefit | Best Usage |
| Cold-Pressed Rapeseed | 230°C (High) | Ideal Omega 3:6 ratio (Anti-inflammatory) | All-purpose: Roasting, baking, dressings |
| Extra Virgin Olive | 190-210°C (Med) | High in protective Polyphenols | Drizzling, low-medium heat sautéing |
| Extra Virgin Avocado | 255°C (v. High) | High in Oleic acid & Lutein (Eye health) | Searing, high-heat frying, grilling |
Why “Cold-Pressed” Matters:
You can remind your readers that Refined/Industrial oils go through “RBD” (Refining, Bleaching, Deodorising), which often uses hexane (a petroleum solvent) to extract every last drop. This process strips away the vitamins and antioxidants that make these oils “live” foods.
By choosing cold-pressed, you are opting for a mechanical process that keeps the oil’s nutrients, colour, and flavour exactly as nature intended.
Recommended Products for your site:
: British grown and cold-pressed.
: Award-winning nutty flavour.
- Hunter & Gather Avocado Oil
: 100% natural and high-heat stable.