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August 28, 2025 61 mins

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What if the sugar diet isn’t working because of sugar, but because of protein restriction?

FGF-21 is similar to a metabolic reset switch, powerful when used occasionally, but risky if left on all the time. Chronic activation often comes with trade-offs such as muscle loss, hormonal changes, and nutrient deficiencies. Robert Sikes and I talk about how the Sugar Diet may leverage FGF-21 but that there are ways to leverage FGF-21 without using sugar. 

Robert Sikes is the founder of Keto Brick. He has been following a ketogenic lifestyle for over a decade and turned professional in bodybuilding in 2023. Through his work, Robert coaches athletes and everyday people to optimize performance, build muscle, and achieve sustainable health without extreme dieting or performance-enhancing drugs.

In this episode, I sit down with Robert Sikes (aka Keto Savage) to unpack his latest self-experiment: eating 4,000 calories per day with 400g of fat and minimal protein, and doubling his testosterone in just 2 weeks.

We discuss the following: 

  • Why the sugar diet became popular
  • Robert’s diet experiment
  • Are some not built for low carb?
  • Recommended protein macros
  • What is VO2 max testing
  • How long to get fat adapted
  • Robert’s keto bodybuilding program
  • Optimal testosterone range
  • Lessons from 11 years of keto
  • Robert’s cacao sourcing journey
  • Where to find Robert Sikes
  • Judy's pull-up journey (bonus)

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*DISCLAIMER: This content is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. It should not replace professional medical advice.

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