How to Personalize your Health Using Genetics with Justin Harris
From The Smart Nutrition Made Simple Show with Ben Brown by Benjamin Brown
January 27, 2026 · 42 min · Episode 301
About this episode
In this episode, Ben Brown and Justin Harris discuss how genetics can personalize health and nutrition plans.
Genetics provide the context most training and nutrition plans are missing. In this episode, I sit down with Justin Harris to explain why starting with genetics removes so much of the guesswork. The body has a built-in hardware that shapes how your body responds to food, training, stress, and supplements long before habits come into play. Once you understand that framework, your decisions stop feeling random. We walk through real examples, including why some people struggle with caffeine, vitamin D, high-fat diets, or recovery even when they are doing the right things. These patterns are not random, and they are rarely about effort. We also cover when genetic testing actually makes sense and why it works best once the basics are already in place. If you want fewer guesses and better decisions around training, nutrition, and long-term health, this episode is for you. Tune in now. Timestamp: 00:00 – Episode Preview 01:06 – Podcast Intro 02:14 – One Plan Doesn’t Fit Everyone 04:39 – What Genetics Control 07:58 – Who Genetic Testing Is For 10:25 – Inflammation Has a Source 12:42 – Why Vitamin D Isn’t Absorbing 15:35 – Alcohol and Caffeine Hit Differently 18:54 – When High Fat Diets…
People in this episode
Host: Benjamin Brown
Guest: Justin Harris
Topics covered
- genetics
- nutrition
- personalized health
- training
- caffeine sensitivity
- vitamin D absorption
Keywords
- genetics
- nutrition
- training
- caffeine
- vitamin D
- high-fat diets
- genetic testing
Mentioned in this episode
Organizations: DNA 360
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