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Dr. Ruscio Radio, DC: Health, Nutrition and Functional Healthcare

951 - The Science of Seed Oils: Are They Really Harmful?

Dr. Ruscio Radio, DC: Health, Nutrition and Functional Healthcare

Dr. Michael Ruscio, DC

Medical, Health, Functionalmedicine, Alternative Health, Health & Fitness

4.5774 Ratings

🗓️ 27 January 2025

⏱️ 38 minutes

🧾️ Download transcript

Summary

Seed oils have been a controversial topic as of late.  But, are they all harmful? In this episode, I’ll present extensive research on seed oils, how they’re affecting your body, and suggest the best ways to consume them.  

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Read next 👇

What Seed Oils Are & Why You Don’t Need to Be Afraid

https://drruscio.com/what-are-seed-oils/  

Timestamps

00:00 Intro 

01:24 Linoleic acid

01:51 Do they cause inflammation?

09:07 Increased risk of heart disease?

15:06 Key heart disease studies

17:17 Omega-3 & omega-6

19:08 Processing, chemical solvents & hexane

21:24 Is refinement/hexane harmful? 

25:10 Best heating uses

29:23 Hydrogenated/trans fats

32:03 Key takeaways 

Featured Studies 

📉Omega-6 vegetable oils & heart disease

https://pubmed.ncbi.nlm.nih.gov/30364556/

📉Increasing linoleic acid & tissue arachidonic acid content

https://pubmed.ncbi.nlm.nih.gov/21663641/

📉Long-chain conversion of [13C]linoleic acid & alpha-linolenic acid

https://pubmed.ncbi.nlm.nih.gov/15576848/

📉Omega-6 fatty acids &  risk for cardiovascular disease

https://pubmed.ncbi.nlm.nih.gov/19171857/

📉Linoleic acid intake &  blood inflammatory markers https://pubmed.ncbi.nlm.nih.gov/28752873/

📉A diet containing grapeseed oil-based fats does not increase lipid peroxidation in humans https://pubmed.ncbi.nlm.nih.gov/11641740/

📉Linoleic acid & heart disease https://pubmed.ncbi.nlm.nih.gov/25161045/

📉Linoleic Acid & Type 2 Diabetes https://pubmed.ncbi.nlm.nih.gov/34417277/

📉Linoleic acid & mortality

https://pubmed.ncbi.nlm.nih.gov/32020162/

📉Foods &  LDL cholesterol

https://pubmed.ncbi.nlm.nih.gov/33762150/

📉Oils & solid fats on  blood lipids https://pubmed.ncbi.nlm.nih.gov/30006369/

📉Canola oil & cardiovascular risk factors

https://pubmed.ncbi.nlm.nih.gov/33127255/

📉Fats & cardiometabolic risk during weight gain

https://pubmed.ncbi.nlm.nih.gov/25319187/

📉Saturated Fat Promotes Fatty Liver& Ceramides

https://pubmed.ncbi.nlm.nih.gov/31369090/

📉Replacing saturated fat with n-6 polyunsaturated fat

https://pubmed.ncbi.nlm.nih.gov/28526025/

📉Reduction in saturated fat for cardiovascular disease

https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011737.pub3/full

📉The Omega-6:Omega-3 ratio

https://pubmed.ncbi.nlm.nih.gov/29599053/

📉Cognitive Impairment & Low Omega-3 Index

https://pubmed.ncbi.nlm.nih.gov/27701160/

📉Blood Omega-3 Index & Cognition

https://pubmed.ncbi.nlm.nih.gov/26729157/

📉Omega-3 Index & risk for coronary heart disease mortality

https://pubmed.ncbi.nlm.nih.gov/28511049/

📉Omega-3 index &  type 2 diabetes

https://pubmed.ncbi.nlm.nih.gov/34740031/

📉Hexane Content in Vegetable Oils

https://openaccesspub.org/experimental-and-clinical-toxicology/article/622

📉Pressed & extracted vegetable oils

https://pubmed.ncbi.nlm.nih.gov/37576238/

📉 Cooking oils in nonalcoholic fatty liver disease

https://pubmed.ncbi.nlm.nih.gov/24625239/

📉Grapeseed/canola-oil supplementation reduces serum lipids & liver enzymes in adipose tissuehttps://pubmed.ncbi.nlm.nih.gov/25403327/

📉Whey - From waste to a valuable resource

https://www.sciencedirect.com/science/article/pii/S266615432400317X

📉Sustainable Protein Powders

https://www.foodunfolded.com/article/sustainable-protein-powders-whey-vs-plant-based

📉Protein & resistance training-induced gains https://pubmed.ncbi.nlm.nih.gov/28698222/

📉Whey Protein & Resistance Exercise Training https://pubmed.ncbi.nlm.nih.gov/37571361/

📉Ultra-processed food consumption & cardiovascular mortality

https://pubmed.ncbi.nlm.nih.gov/33536027/

📉Trans Fat https://www.fda.gov/food/food-additives-petitions/trans-fat

📉Fat hydrogenation https://en.wikipedia.org/wiki/Fat_hydrogenation

📉Heating & Trans Fatty Acid Content of Edible Oils

https://pubmed.ncbi.nlm.nih.gov/35406103/

📉Heating & Fatty Acid Composition of Plant-Based Cooking Oils

https://pubmed.ncbi.nlm.nih.gov/35053923/#:~:text=The%20present%20data%20indicate%20that,the%20number%20of%20heating%20sequences.

📉How Long to Fry Every Food https://www.tasteofhome.com/article/deep-frying-temperature-chart/#:~:text=What%20is%20the%20normal%20temperature,right%20type%20of%20cooking%20fat.

📉Lean red meat & human evolution https://pubmed.ncbi.nlm.nih.gov/10918988/

📉Fatty acid &  wild ruminant tissues https://pubmed.ncbi.nlm.nih.gov/11960292/ 

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Music featured in this video "Modern Technology" by Andrew G https://audiojungle.net/user/andrew_g 

Full transcript available on YouTube by clicking the “Show transcript” button on the bottom right of the video.

Transcript

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0:00.0

Welcome to Dr. Rucho Radio, providing practical and science-based solutions to feeling your best.

0:14.8

To stay up to date on the latest topics, as well as all of our prior episodes, make sure to subscribe in your podcast player.

0:22.2

For weekly updates, visit Dr. Russo.com.

0:25.4

Hey, everyone. Welcome back. Let's discuss seed oils.

0:28.4

I was quite keen to do a deep dive on seed oils and inflammation, heart disease, processing chemical

0:35.8

solvents, and hexane, heating, overheating, reheating,

0:40.0

and their use in processed foods.

0:43.2

So today, we'll summarize what was over 75 hours of research amongst our research team

0:50.4

and myself, distilling over 50 studies down into a few really important conclusions

0:57.0

regarding seed oils, some of which are positions I've changed my mind on in light of the research

1:04.5

that we've gone through. So just as a quick recap and a few points of nomenclature, seed oils are rich in omega-6, especially

1:15.5

linoleic acid. And many of the papers that we'll discuss, you'll hear this term

1:20.7

linoleic acid come up. It's kind of a stand-in for seed oils, again, because seed oils

1:26.2

are very rich in linoleic acid. And conversely, seed oils, again, because seed oils are very rich in the in olayic acid.

1:29.0

And conversely, seed oils are low in saturated fat.

1:34.5

Soybean, canola, safflower, sunflower, cotton seed, grape seed, peanut, sesame, these are all

1:41.1

seed oils.

1:42.2

And olive oil and avocado oil are not seed oils.

1:49.2

Regarding linoleic acid, it is considered an essential fatty acid that the body can't synthesize.

1:56.8

It needs to obtain through diet.

1:59.5

Deficiencies can lead to dry skin, hair loss, metabolic,

2:03.3

problems of various sorts, and it does function as an important component of the inner mitochondrial

...

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