There is another reason to avoid palm oil and question the authenticity of extra-virgin olive oil.

The most commonly used vegetable oil in the world today is palm oil. Pick up any package of processed food in a box, bag, bottle, or jar, and the odds are it will have palm oil. Palm oil not only contains the primary cholesterol-raising saturated fat found mostly in meat and dairy, but concerns have been raised about its safety, given the finding that it may contain a potentially toxic chemical contaminant known as 3-monochloropropane-1,2-diol, otherwise known as 3-MCPD, which is formed during the heat treatment involved in the refining of vegetable oils. So, these contaminants end up being “widespread in refined vegetable oils and fats and have been detected in vegetable fat-containing products, including infant formulas.”

Although 3-MCPD has been found in all refined vegetable oils, some are worse than others. The lowest levels of the toxic contaminants were found in canola oil, and the highest levels were in palm oil. Based on the available data, this may result in “a significant amount of human exposure,” especially when used to deep-fry salty foods, like french fries. In fact, just five fries could blow through the tolerable daily intake set by the European Food Safety Authority. If you only eat such foods once in a while, it shouldn’t be a problem, but if you’re eating fries every day or so, this could definitely be a health concern.

Because the daily upper limit is based on body weight, particularly high exposure values were calculated for infants who were on formula rather than breast milk, since formula is made from refined oils, which—according to the European Food Safety Authority—may present a health risk. Estimated U.S. infant exposures may be three to four times worse.

If infants don’t get breast milk, “there is basically no alternative to industrially produced infant formula.” As such, the vegetable oil industry needs to find a way to reduce the levels of these contaminants. This is yet another reason that breastfeeding is best whenever possible.

What can adults do to avoid exposure? Since these chemicals are created in the refining process of oils, what about sticking to unrefined oils? Refined oils have up to 32 times the 3-MCPD compared to their unrefined counterparts, but there is an exception: toasted sesame oil. Sesame oil is unrefined; manufacturers just squeeze the sesame seeds. But, because they are squeezing toasted sesame seeds, the 3-MCPD may have come pre-formed.

Virgin oils are, by definition, unrefined. They haven’t been deodorized, the process by which most of the 3-MCPD is formed. In fact, that’s how you can discriminate between the various processing grades of olive oil. If your so-called extra virgin olive oil contains MCPD, then it must have been diluted with some refined olive oil. The ease of adulterating extra virgin olive oil, the difficulty of detection, the economic drivers, and the lack of control measures all contribute to extra virgin olive oil’s susceptibility to fraud. How widespread a problem is it?

Researchers tested 88 bottles labeled as extra virgin olive oil and found that only 33 were found to be authentic. Does it help to stick to the top-selling imported brands of extra virgin olive oil? In that case, 73% of those samples failed. Only about one in four appeared to be genuine, and not a single brand had even half its samples pass the test, as you can see here and at 3:32 in my video 3-MCPD in Refined Cooking Oils.

Doctor’s Note

If you missed the previous post where I introduced 3-MCPD, see The Side Effects of 3-MCPD in Bragg’s Liquid Aminos.

There is no substitute for human breast milk. We understand this may not be possible for adoptive families or those who use surrogates, though. In those cases, look for a nearby milk bank.

from NutritionFacts.org https://nutritionfacts.org/blog/3-mcpd-in-refined-cooking-oils/
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We had the pleasure of talking with Ronnie Penn about his military service, his work as a chef and a coach, and what Veterans Day means to him. We hope you enjoy this interview.

Thank you for your service, Ronnie. We’re honored to speak with you today. Can you start by sharing a bit about your background? What inspired you to enlist, and when did your military journey begin?

I grew up wanting to serve something bigger than myself, and the Marine Corps gave me that opportunity. I enlisted in 2004 and deployed to Iraq during Operation Iraqi Freedom and to Afghanistan from 2012 to 2014. Later, I served in the Coast Guard as a chef, which opened a whole new chapter in how I looked deeper into nutrition. Service taught me discipline, resilience, and the importance of teamwork—qualities I carry into everything I do today.

How did your time in the military shape who you are today? Is there anything in particular about your service that you would like to share?

The military taught me to stay calm under pressure and adapt quickly. Whether it was on deployment overseas or working with my shipmates in the galley, I learned how much impact food, mindset, and discipline can have on performance and morale. Those lessons shaped who I am now—not only as a veteran, but also as a coach who helps others take control of their health.

Were there any habits or disciplines from your military experience that helped in your transition to plant-based living or in your work today as a coach?

Two habits stuck with me: structure and accountability. In the Marines, every detail mattered. That same mindset helps me stick to meal prep, training schedules, and coaching clients. It also made the transition to plant-based eating easier because I was already used to planning ahead and being intentional about what I put into my body.

You’ve spoken about health issues that arose during competition prep, which ultimately led you to switch to a plant-based diet. What symptoms were you experiencing at the time, and what physical or medical changes did you notice after the transition?

When I was competing in bodybuilding, I pushed my body hard—lots of animal protein, supplements, and restrictive dieting. Over time, I developed digestive issues and constant fatigue. Switching to a whole food, plant-based diet changed everything. My digestion improved, and my energy came back. It was eye-opening to see how quickly the body can heal when you give it the right fuel.

Did you encounter any challenges accessing or preparing plant-based foods during active service? How did you make it work in that environment?

Back then, plant-based options were limited, especially on deployment. I loaded up on oatmeal, beans, rice, fruits, and vegetables whenever I could, and I had to get creative, too. I learned how to make simple meals with what was available, and that creativity carried into my role as a chef in the Coast Guard.

Were there any particularly memorable reactions from your shipmates or peers when you introduced them to plant-based meals as a chef in the Coast Guard?

At first, my shipmates were skeptical. But once I started cooking hearty meals, like lentil stews, veggie burritos, or black bean burgers, they were surprised by how satisfying plant-based food could be. I still remember one crew member saying, “I didn’t even miss the meat.” Moments like that showed me how powerful food can be in changing perceptions.

You’ve become a vocal advocate for plant-based eating in high-performance settings. Are there any particular studies or sources that informed or reinforced your choices?

The work of Dr. Greger and NutritionFacts.org has had a huge impact on me. I also leaned on research from the Physicians Committee for Responsible Medicine (PCRM) and books like The China Study. Seeing the science laid out gave me confidence that a plant-based diet wasn’t just personal preference; it was evidence-based. Also, the Netflix documentaries What the Health and Forks Over Knives were also extremely effective influences.

In your opinion, how can education about preparing whole plant foods be a path forward for people to achieve better health?

Education is the key. When people learn how to prepare whole plant foods in simple, tasty ways, it removes the intimidation factor. Once they see how it can lower blood pressure, improve energy, and even prevent chronic disease, it clicks. Food literacy is one of the most powerful tools we have for better health.

Please tell us about your online personal training program and app. What inspired you to start these projects, and how do they help you reach more people with your message?

I started my online fitness coaching because I wanted to reach people beyond the gym. Not everyone can afford a trainer, but most people have a smartphone. Through my training app, I provide meal plans, workout routines, and a grocery list with accountability check-ins. It’s a way to scale what I do—helping people take small, daily steps toward a healthier life.

Lastly, what does Veterans Day mean to you? Is there anything you would like to share with your fellow veterans?

Veterans Day is a moment of reflection for me. It’s about honoring the sacrifices of those who served, as well as reminding myself to live in a way that makes that service meaningful. I want to encourage other veterans to take care of themselves, not just physically, but mentally and emotionally, too. We served our country; now it’s time to serve ourselves by living healthy and purposeful lives.

To learn more about Ronnie, visit his website: https://www.ronniepenn.com/

from NutritionFacts.org https://nutritionfacts.org/blog/celebrating-veterans-day-with-ronnie-penn/
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