Diet Science - podcast cover

Diet Science

Dee and Michael McCaffreyblubrry.com
Diet Science is a fun 7 to 8 minute weekly program with insights and straight scoops on today's health and diet issues from Dee McCaffrey, CDC. Dee is an Organic Chemist who lost 100 pounds, nearly half her body weight, and has kept it off for 20 years by staying away from processed foods. She's the author of The Science of Skinny, released by Perseus June 2012, and The Science of Skinny Cookbook, which was released December 2014.
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Episodes

Berry Dirty: Why Blackberries Made the 2025 Dirty Dozen

This week, Dee dives into the ​recently released Environmental Working Group's (EWG) 2025 ​Shopper's Guide to Pesticides in Produce, commonly known as "The Dirty Dozen and Clean Fifteen ​List​s", with a spotlight on blackberries—a new addition to the Dirty Dozen​ list, coming in at number ten. Listen in as Dee explains why blackberries made the list for the first time this year, ​and delves into the other produce items on both the Dirty Dozen and Clean 15 Lists to help ​you make safer, cleaner d...

Aug 03, 202530 min

New Blood Test Can Reveal Your Ultra-Processed Food Intake

​In a groundbreaking new study, researchers have developed a blood and urine test capable of identifying how much ultra-processed food is in your diet. By analyzing metabolites—chemicals produced as the body breaks down food—researchers can now distinguish between individuals who consume high amounts of ultra-processed foods and those who eat little to none. Listen in this week as Dee discusses the details of this study and how the test works, what it means for the future of nutrition research a...

May 30, 202510 min

Sorghum: The Supergrain Hiding in Plain Sight

From its impressive nutritional profile to its role in blood sugar balance and gut health, sorghum just might be the next superfood you’ve never heard of. Listen in this week as Dee digs into the ancient grain that’s quietly stealing the spotlight in modern nutrition. Whether you're curious about how to cook it, bake with it, or just want to diversify your plate—Dee lays it all out for you. Reference: Stefoska-Needham A. (2024). Sorghum and health: An overview of potential protective health effe...

May 12, 202510 min

Methyl Adaptogens: Your New Anti-Aging Dream Team

The results of a new study shows that consumption of polyphenols in certain foods--known as methyl adaptogens--can turn back your biological clock. Listen in this week as Dee discusses the study and reveals the short list of common foods that literally help you age better from the inside out. Reference: Villanueva, J. L., Vita, A. A., Zwickey, H., Fitzgerald, K., Hodges, R., Zimmerman, B., & Bradley, R. (2025). Dietary associations with reduced epigenetic age: a secondary data analysis of th...

May 04, 20256 min

Cocoa and Carob: A Sweet Duo for Managing Diabetes

A new study shows that a specific blend of cocoa and carob powder improves metabolic health markers in people with Type 2 diabetes. Listen in this week as Dee discusses the study, the specific ratio of cocoa to carob used in the study, and how this delicious duo offers a new strategy for supporting blood sugar balance. Reference: Villalva, M., García-Díez, E., Del Carmen López De Las Hazas, M., Lo Iacono, O., Vicente-Díez, J. I., García-Cabrera, S., Alonso-Bernáldez, M., Dávalos, A., Martín, M. ...

Apr 27, 20257 min

Can You Be Healthy with High Cholesterol?

Groundbreaking new research challenges conventional beliefs about cholesterol and heart disease. A one-year prospective study of 100 metabolically healthy adults following a long-term ketogenic diet found no correlation between extremely high LDL cholesterol and the progression of coronary artery disease. Listen in this week as Dee explains the study, the importance of personalized risk assessment, why cardiac imaging might matter more than cholesterol levels alone, and what this means for patie...

Apr 20, 202513 min

Thyroid Signals: What Your Body’s Symptoms Are Really Saying

If you’re struggling with fatigue, chronic constipation, weight gain, or weight loss resistance, an underactive thyroid could be the hidden cause. Listen in this week as Dee explains how the thyroid gland plays a big part in regulating metabolism, digestion, and energy, and the role of diet and lifestyle in treating the root cause of thyroid hormone imbalance. Work with Dee: https://deemccaffrey.com/

Apr 13, 202511 min

Talkin’ Tallow: Is This Rendered Beef Fat Good for Your Health?

Beef tallow, aka rendered beef fat, was once a staple in American home cooking and fast-food kitchens throughout much of the 20th century. Though it declined in popularity due to concerns over its saturated fat content, it’s now making a comeback. Listen in this week as Dee breaks down the sizzling truth about beef tallow—its nutritional perks, potential pitfalls, and whether it earns a spot in a healthy diet. Reference: Limmatvapirat, C. (2020). Beef tallow consumption and health. The Journal o...

Apr 07, 202511 min

Longtime Efforts to Ban Artificial Food Dyes & Preservatives Finally Coming to Fruition!

In March 2011, Processed-Free America (aka Center for Processed-Free Living) submitted arguments against artificial food coloring to the United States Center for Food Safety and Applied Nutrition. Now, 14 years later, the country is starting to pay attention. Listen in this week as Dee discusses the recent ban on 7 food dyes in West Virginia, and similar proposed bans in 23 other states. She explores the science behind artificial colorings, the potential effects on behavior and health that led t...

Mar 30, 202511 min

Prickly Power: Unlocking the Health Benefits of Red Cactus Pears

A staple of the Native American diet for centuries, Red Cactus Pears are packed with incredible health benefits. Listen in this week as Dee discusses why this small, watermelon-like fruit is a true superfood, and how to incorporate it into your meals. Reference: Giraldo-Silva, L., Ferreira, B., Rosa, E., & Dias, A. C. P. (2023). Opuntia ficus-indica fruit: A systematic review of its phytochemicals and pharmacological activities. Plants, 12(3), 543. https://pmc.ncbi.nlm.nih.gov/articles/PMC99...

Mar 23, 20258 min

Alpha Lipoic Acid: The Universal Antioxidant

Known as the "universal antioxidant," alpha-lipoic acid (ALA) is a powerhouse for fighting oxidative stress and supporting overall health. Listen in this week as Dee explores how ALA helps combat diabetes, heart disease, Alzheimer’s, fatty liver, and more—plus, why it’s essential for your metabolism! Reference: Salehi, B., Berkay Yılmaz, Y., Antika, G., Boyunegmez Tumer, T., Fawzi Mahomoodally, M., Lobine, D., Akram, M., Riaz, M., Capanoglu, E., Sharopov, F., Martins, N., Cho, W. C., & Shari...

Mar 16, 202512 min

Stop the Microplastics Mayhem! Proactive Steps to Minimize Exposure

Microplastics are tiny plastic particles—smaller than a grain of sand—shed from bottles, bags, tires, synthetic fabrics, and even cosmetics. Linked to obesity, diabetes, heart disease, Alzheimer’s, and cancer, these invisible invaders are everywhere. Listen in this week as Dee shares nutrition and detox strategies to help clear them from your body. Reference: Marfella, R., Prattichizzo, F., Sardu, C., Fulgenzi, G., Graciotti, L., Spadoni, T., D’Onofrio, N., Scisciola, L., La Grotta, R., Frigé, C...

Mar 09, 202515 min

Can Eating Grapes Keep Your Muscles Strong as You Age?

Could eating a simple bowl of grapes be the key to stronger muscles? A groundbreaking study says yes—especially in aging women. Listen in this week as Dee discusses the findings of this new research ane explores how the 1,600 natural compounds in grapes work together to support lean muscle mass, why these findings matter for healthy aging, and what it could mean for yyour health. Reference: Dave, A., Park, E., Piya, S., & Pezzuto, J. M. (2025). Long-term dietary consumption of grapes alters ...

Mar 03, 20258 min

Boost Your Brainpower with Walnuts for Breakfast

Could your breakfast choice set the tone for sharper thinking all day long? A new study says yes, especially if your breakfast includes walnuts. Listen in this week as Dee breaks down the science behind this brain-boosting nut and how you can easily incorporate it into your diet for lasting cognitive benefits. Reference: Bell, L., Dodd, G. F., Jeavons, M., Fisher, D. R., Whyte, A. R., Shukitt-Hale, B., & Williams, C. M. (2025). The impact of a walnut-rich breakfast on cognitive performance a...

Feb 24, 20258 min

The Probiotic Shield: Yogurt’s Role in Colon Cancer Risk

A recent study suggests that long-term yogurt consumption, which typically contains a genus of probiotic Bifidobacterium, is associated with a 20% decreased incidence of colorectal cancer. Listen in this week as Dee explains how Bifidobacterium works in the gut, why it may protect against the formation of tumors, and how much yogurt you need to eat each week to get the same amount reported in the study. References: Ugai, S., Liu, L., Kosumi, K., Kawamura, H., Hamada, T., Mima, K., Arima, K., Oka...

Feb 15, 202512 min

Heart-Healthy Sips: How 3 Red Juices Can Lower Blood Pressure

February is Heart Health Month, making it the perfect time to explore the power of nutrition to naturally lower high blood pressure. Listen in this week as Dee discusses the research showing how adding one or more of three powerhouse red juices--beet juice, tomato juice, and pomegranate juice--to your diet can help keep your blood pressure in check and support overall cardiovascular health. References: Benjamim, C. J. R., Porto, A. A., Valenti, V. E., Sobrinho, A. C. D. S., Garner, D. M., Gualan...

Feb 09, 202513 min

Acetylcholine: Nature's Nootropic for Boosting Brain Function

Acetylcholine enhances memory, focus, and muscle function, earning its reputation as a natural nootropic. But, as we age, the body's ability to produce it declines, potentially impacting brain health and physical performance. Listen in this week as Dee explains how acetylcholine is made in the body, and practical ways to boost its production through diet and supplementation. Reference: Nakazaki, E., Mah, E., Sanoshy, K., Citrolo, D., & Watanabe, F. (2021). Citicoline and memory function in h...

Feb 02, 20259 min

Why Iodine Deficiency is Making a Comeback

A century ago, goiters resulting from iodine deficiency were rampant in people living in inland states from Appalachia and the Great Lakes to the northwest United States---an area that came to be known as the "goiter belt." Iodized salt solved that problem. But now iodine deficiency and goiters are making a comeback in the U.S. Listen in this week as Dee discusses why this is happening and how to ensure you get enough iodine in your diet without iodized salt. Reference: Hatch-McChesney, A., &amp...

Jan 26, 202510 min

A Win for Safer Foods: FDA Finally Bans Red Dye No. 3

In response to a 2022 color additive petition from consumer advocacy groups, the FDA has finally put a ban on the use of food dye no. 3, a synthetic food coloring linked to health risks like hyperactivity and cancer. Listen in this week as Dee discusses this long-overdue decision and what it means for your health. Reference: U.S. Food and Drug Administration. (2025, January 15). FDA to revoke authorization for the use of red no. 3 in food and ingested drugs. https://www.fda.gov/food/hfp-constitu...

Jan 19, 202511 min

Knobby but Nice: Why Celery Root Deserves a Spot on Your Plate

Celery root (aka celeriac) is an underrated vegetable with big health benefits Listen in this week as Dee explores what makes celery root special, from how it grows and what it tastes like to its impressive nutrition profile. She'll also share the best ways to prepare it, how it differs from celery stalks, and why it deserves a spot in your kitchen. Link to Celery Root Mash Recipe: https://www.simplyrecipes.com/recipes/celery_root_mash/ Reference: Varotariya, K., & Selvakumar, R. (2023). Cel...

Jan 12, 20256 min

The Power of Zinc: Immune Health and Beyond

In the midst of cold and flu season, zinc is a powerhouse mineral essential for a strong immune system. It is also important for wound healing, testosterone production, and even your sense of taste and smell. Listen in this week as Dee dives into everything you need to know to harness the benefits of zinc, from the top food sources, best types of zinc supplements, and strategies to boost absorption. Reference: Kiouri, D. P., Tsoupra, E., Peana, M., Perlepes, S. P., Stefanidou, M. E., & Chasa...

Jan 05, 20257 min

The Cancer Connection: Seed Oils vs. Omega-3s

Two studies published in the same week reveal how seed oils like canola, corn, soy and cottonseed may increase inflammation, creating a pathway for cancer to thrive. On the flip side, omega-3-rich fish oils show promise in reducing inflammation and bolstering the immune system. Listen in this week as Dee discusses the science behind these findings and their potential impact on your health. References: Aronson, W. J., Grogan, T., Liang, P., Jardack, P., Liddell, A. R., Perez, C., Elashoff, D., Sa...

Dec 29, 202410 min

Peeling Back the Benefits: The Wonders of Banana Peel Flour

Peeling Back the Benefits: The Wonders of Banana Peel Flour Most people discard banana peels and only eat the fruit inside. However, research shows that the peels of bananas have many health benefits when dried and ground into flour. Listen in this week as Dee discusses this sustainable, nutrient-rich flour and some creative ways to incorporate banana peel flour into your recipes while reducing food waste and supporting a healthier lifestyle. Reference: Shafi, A., Ahmad, F., & Mohammad, Z. H...

Dec 22, 20247 min

Cocoa Science: A Surprising Health Hack

It is widely known that episodes of high stress, even short ones, temporarily impair artery function. To make things worse, people often eat high-fat foods in times of stress, which puts more stress on the cardiovascular system. Listen in this week as Dee discusses a study showing how drinking a special kind of cacao drink may be the antidote to the cardio impacts of high stress and high fat meals. Reference: Baynham, R., Veldhuijzen van Zanten, J. J. C. S. V., & Rendeiro, C. (2024). Cocoa f...

Dec 15, 202411 min

Fat Cell Recall: Why Losing Weight Isn’t the End of the Story

Why do people regain weight more quickly than expected after successfully losing it? Research shows that once someone has been overweight or obese, the genes in their fat cells undergo changes, creating a "memory" of the overweight state. This makes it easier for the body to return to that state. Listen in this week as Dee discusses this fascinating research, and what it means for long term weight loss maintenance. Reference: Hinte, L. C., Castellano-Castillo, D., Ghosh, A., Melrose, K., Gasser,...

Dec 08, 20249 min

Cutting Out Sugar Can Positively Change Your Health Within Days or Weeks--Not Months or Years

Reducing sugar intake not only protects you from the negative effects of overconsumption but also offers surprising benefits that you can experience quickly. Listen in this week as Dee discusses which conditions can be improved by reducing sugar—and what you can do to start limiting your sugar intake today. Reference: Austin, D. (2024, November 18). Giving up sugar can change your body for the better—within days. National Geographic. https://www.nationalgeographic.com/science/article/health-bene...

Dec 02, 20249 min

Why the 2025 Dietary Guidelines for Americans Likely Won't Take a Stance Against Ultra-Processed Foods

A promising change for the USDA's 2025 Dietary Guidelines to suggest limiting or avoiding ultra-processed foods has been dashed. A scientific advisory committee has declared there is not enough evidence to recommend avoiding them. Listen in this week as Dee discusses how they came to their conclusion, and why she and many experts disagree with it. Reference: Callahan, A. (2024, November 14). Why the next dietary guidelines might not tackle ultraprocessed foods. The New York Times. https://www.ny...

Nov 24, 202410 min

The Science Behind Your Morning Cup: Health Benefits of Coffee

While its caffeine content is known for improving cognitive function, the true heroes of coffee are its antioxidants and polyphenols. These compounds may help to ward off or reverse many chronic conditions, proving coffee to be more than just an energizing beverage.Listen in this week as Dee discusses how your morning brew might be contributing to your health in surprising ways! Reference: Kolb, H., Kempf, K., & Martin, S. (2020). Health effects of coffee: Mechanism unraveled?. Nutrients, 12...

Nov 17, 202410 min

Hops & Health: The Surprising Benefits of Beer’s Key Ingredient

Does beer have a secret superpower? Research shows that moderate, mindful beer enjoyment might be a little healthier than you think. Listen in this week as Dee discusses the research showing the health benefits of the bitter acids and polyphenols found in the compounds that also give beer its flavor and aroma. Reference: Carbone, K., & Gervasi, F. (2022). An updated review of the genus Humulus: A valuable source of bioactive compounds for health and disease prevention. Plants, 11(24), 3434. ...

Nov 10, 202410 min

Air Fryers: Healthy Hack or Just Hype?

Air fryers have become a popular kitchen tool, and they're generally considered a safer way to create a crispy texture to foods than deep frying, but they do still pose some health risks. Listen in this week as Dee offers valuable insights on the pros and cons of preparing food in an air fryer. Reference: De Oliveira, V. S., Viana, D. S. B., Keller, L. M., De Melo, M. T. T., Mulandeza, O. F., Barbosa, M. I. M. J., Júnior, J. L. B., & Saldanha, T. (2024). Impact of air frying on food lipids: ...

Nov 03, 202414 min
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