Rubin on Point
What if your DNA isn’t your destiny? In Part 1 of this conversation, Dr. Dan Rubin sits down with molecular diagnostics expert Dr. Brandon Guida to break down epigenomics—the system that controls how your genes are actually expressed. This is the layer above your DNA… the one that decides what gets turned on, turned off, and when. If genetics are the blueprint, epigenomics is the operating system. And it’s constantly changing. In this episode, we unpack: * What epigenomics actually is (without the jargon) * Why DNA methylation is only part of the story * The difference between genetic testing vs. epigenetic insight * How lifestyle, environment, and exposures shape your biology * Why two people with the same genes can have completely different outcomes This is foundational. And it sets the stage for how we think about cancer, resilience, and personalized medicine. ⏱️ CHAPTERS 00:00 – Welcome to Rubin On Point 00:42 – Introducing Dr. Brandon Guida 01:23 – What is epigenomics (really)? 02:23 – Why DNA methylation is oversimplified 03:17 – MTHFR vs. epigenomics (key distinction) 05:04 – Genotype vs. phenotype explained 06:30 – The origin of epigenetics (Waddington’s model) 09:07 – How methylation actually turns genes on/off 10:31 – The “iPhone” analogy for your biology 13:42 – Genes vs. epigenome: who’s in control? 14:59 – Can your epigenome be changed? 18:02 – Epigenetic “memory” and environmental impact 19:55 – What happens in cancer (epigenetically) 22:28 – Tumor suppressor genes + methylation 23:41 – Why this matters clinically (Part 2 preview)
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