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The Kris Gethin Podcast

Dec 17, 2019

On this episode of Knowledge and Mileage, Kris talks with Matt Maruca, extreme biohacker and expert on the circadian rhythm. Matt has used his struggles as a teenager with his health to develop his signature program The Light Diet which focuses on optimizing your circadian rhythm and biological processes through sun exposure and limiting blue light.

Tune in to hear how light exposure is being found to be a root cause of a healthy lifestyle.

Time Stamps

  • Why Matt started to focus on holistic health at the age of 13 [4:00]
  • The beginnings of Matt’s idea of a Light Diet [8:45]
  • Managing allergies through dietary and lifestyle changes [12:15]
  • Sun Exposure vs Red Light Therapy and seasonal affective disorder [18:45]
  • Does sunlight cause cancer? The history of the research on sunlight [28:30]
  • Optimizing circadian rhythm with a sun exposure protocol [33:45]
  • How does your circadian rhythm effect your body composition? [43:30]
  • Should you move your training outside? [51:00]
  • Is the increase of blue light devices contributing to childhood obesity? [54:30]
  • Matt simplifies ATP [1:02:30]
  • How Matt manages his light exposure while traveling [1:06:00]
  • Why Matt follows a seafood ketogenic diet [1:08:00]

Featured Guest: Matt Maruca

Related Links/Products Mentioned

People Mentioned

Episode Sponsors

  • This episode is brought to you by Laird's Superfood. If you are on the go like Kris is and need a pick-me-up use Laird's InstaFuel because it goes beyond just coffee and includes their amazing superfood creamer. Use code GETHIN20 for 20% off your first purchase.
  • Want to upgrade your digestion? Check out MassZymes by BioOptimizers, the most powerful protein-digesting enzyme on the planet. Use code KRIS20 for 20% off your order at
  • BioOptimizers not only has the best solution for assistance in protein digestion, their brand new supplement Kapex is now here to help with fat digestion! Use code KRIS20 at for 20% a bottle of BioOptimizers Kapex today!
  • Big thanks to Organifi, the makers of one of my favorite nighttime drinks, the Organifi Gold. Most people usually crave something soothing and nurturing before bed. Of course, a dairy such as yogurt or ice cream is out, but ingredients such as coconut milk, turmeric, cinnamon, lemon balm and ginger in a warm beverage can help reduce stress and induce a nice calming effect to quantify a better sleep cycle of Deep and REM. go to and enter code GETHIN at checkout to receive 20% off your order.

Connect with Kris
Instagram: @krisgethin