Episode 273: Dr. Jacob May | 🧠 How Ultra-Processed Foods Destroy Your Kids' Metabolism

·53 min·2 clips

Precision nutrition expert studies how diet patterns directly affect cellular mitochondrial function.

Vera Tarman hosts Dr. Jacob May for a discussion centered on ultra-processed foods and children. May is an associate professor at Pennington Biomedical Research Center and works in mitochondrial energetics and nutrient utilization, so he brings a metabolism-first lens to the issue. He frames precision nutrition as tailoring diets to optimize health. The conversation keeps circling back to the idea that the body is not reacting to food in just one place at a time, because the gut, the immune system, and mitochondria all sit in the same chain of consequences. May describes the microbiome as highly responsive to diet. He says that low and high ultra-processed-food diets produce different microbiome effects, while also noting that the larger downstream physiology question is still not fully settled. The discussion names dysbiosis as a shift that can become harmful when helpful bacteria diminish or harmful bacteria overgrow. From there, the hosts connect dysbiosis to leaky gut syndrome and the possibility that unwanted material enters the bloodstream and triggers immune response. That immune response is then linked to inflammation and reactive oxygen species. Those changes are presented as potentially affecting insulin sensitivity, susceptibility to obesity, and mitochondrial function. May is careful not to claim more certainty than the evidence allows. He says the field is still early, even though there is enough whole-body human data to say ultra-processed foods, some of their additives, and the absence of certain items in healthier foods are affecting the gut microbiome. The episode also acknowledges that this effect is generally assumed to be negative without claiming every downstream mechanism is settled. That makes the argument feel broader than a single nutrient scare story. The conversation then turns to a striking preclinical example involving fecal implants in mice. May explains that bacteria associated with obesity can make a mouse more obesogenic, which helps show how direct microbial effects can matter. He is explicit that this part of the work is preclinical. The point is not that every mechanism is closed, but that the pattern is serious enough to keep studying. Vera Tarman keeps the exchange oriented toward recovery and toward what listeners can do with the information. The result is a conversation that sits between warning and translation, making a complicated metabolic story feel practical without pretending the science is finished.

As heard by us

A practical look at how ultra-processed foods may affect children's health through metabolism and the microbiome.

Food Junkies treats ultra-processed foods and children's health as a serious recovery question, not a slogan. Vera Tarman talks with Dr. Jacob May, an associate professor at Pennington Biomedical Research Center, and the discussion stays grounded in metabolism and precision…

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For when you want the science behind ultra-processed food harm, without the usual shouting.

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