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Summary
In episode 703 of the 40+ Fitness Podcast, Coach Allan welcomes Dr. Raphael Cuomo, a professor at the University of California, San Diego School of Medicine and an epidemiologist and public health scientist whose research spans cancer prevention and addiction. They discuss his book about the hidden biology of addiction and cancer and how everyday cravings shape long-term health.
Dr. Cuomo argues that cravings are not merely psychological flashes but can become biological programs that alter inflammation, metabolism, and cancer risk. He explains how repeated stimuli, such as a daily soda or thousands of lattes over years, rewire cells and habits alike, turning small “micro patterns” into a lasting “macrobiology” that raises disease risk.
The conversation covers craving loops, metabolic flexibility, chronic inflammation, and its links to autoimmune disease, along with practical steps for recognizing and breaking harmful patterns. Dr. Cuomo emphasizes prevention that works upstream from behavior, addressing how people cope with and respond to daily life.
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Key Takeaways
- Cravings become habits, habits become patterns, and patterns sculpt your internal biology; repetition can substitute for intensity, so many small repeated exposures over years can do measurable cellular harm.
- Dr. Cuomo describes three everyday craving loop categories: stimulant loops (caffeine, energy drinks, nicotine, breaking news), comfort loops (ultra-processed food, alcohol, scrolling), and achievement loops (overwork and sleep sacrifice), and notes they reinforce one another.
- Metabolic flexibility, the ability of healthy cells to switch between glucose and fat for fuel, is undermined by constant grazing, which keeps insulin high and locks fat stores; he says weight alone is not a reliable indicator, and a triglyceride-to-HDL ratio above 2 often signals insulin resistance.
- He explains a “double hit” for cancer: excess insulin-like growth factor (IGF-1) encourages cell proliferation while mitochondrial distress raises reactive oxygen species that damage DNA.
- Chronic inflammation differs from helpful acute inflammation; it releases pro-carcinogenic cytokines like interleukin-6 and tumor necrosis factor, and he cites a Karolinska Institute study of over 100,000 adults, followed up to 17 years, linking elevated C-reactive protein to increased risk of cancers, particularly lung and colorectal.
- As at-home inflammation checks, he suggests watching resting heart rate (keeping it below 70) and looking for bleeding gums, while noting blood tests for CRP or homocysteine are more precise.
- Breaking a cycle requires three ingredients: awareness (including a 72-hour “craving diary,” noting that a craving surge often peaks around 90 seconds), friction (designing your environment to slow impulses), and replacement (swapping a habit for something like deep breathing, a sunlit walk, or Greek yogurt with berries).
- He recommends building up to a seven-day reset that removes caffeine, alcohol, added sugar, and nicotine (the first 48 hours are hardest), and for wellness offers three tactics: guard the first 90 minutes of each morning with light, movement, and protein; schedule a weekly stimulus fast; and keep a strict shutdown ritual before sleep.
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Episode Notes
Podcast: 40+ Fitness
Episode: 703
Published: 2025-07-15
Host: Allan Misner (aka Coach Allan), author of The Wellness Roadmap
Guest(s): Dr. Raphel Cuomo, professor of science at the University of California, San Diego School of Medicine, whose research spans cancer prevention and addiction, author of Crave: The Hidden Biology of Addiction and Cancer
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