Diet Science

Diet Science

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.

Episodes

May 4, 2025 6 mins

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 associati...

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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., Ga...

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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 ...

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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/

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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:

Limmatvapira...

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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 c...

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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. ...

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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., Ca...

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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., Spa...

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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...

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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). T...

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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.,...

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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. ...

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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....

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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 you...

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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...

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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...

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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,...

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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., Lian...

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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 ...

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