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Most guys getting lean reach straight for a fat burner and wonder why they stall, lose muscle, and feel like garbage. In Part 1 of this Round Table, Drew sits down with two of the most obsessive coaches in the enhancement space — Optimal Nathan and Anthony Castore — to build something very different: a no-stone-unturned protocol for getting shredded to the bone. This is the "money is no object, everything's been tested, leave nothing on the table" stack for advanced athletes, executives and high performers.

Key Takeaways

• Why 6–8 weeks of mitochondrial prep before a cut makes fat loss faster and protects muscle
• Nathan's 4-block prep sequence of cleanup, repair, redox, and biogenesis
• Why low insulin "takes the brakes off" stored fat, and why yohimbine is a day-one stubborn-fat tool, not a last resort
• How Nathan dropped 18 lbs in 4.5 weeks (ab folds 8mm → 3.5mm) without hunger or crashing
• Anthony's calorie-cycling model
• The cell-danger response that explains why a cut paradoxically stalls
• Why cell hydration (not just an electrolyte packet) makes peptides actually signal
• Clenbuterol vs. mirabegron, and keeping receptors sensitive instead of chasing dose
• How to build the ultimate shred stack for you

Connect with Optimal Nathan

• YouTube: https://www.youtube.com/@OptimalNathan
• Instagram: https://www.instagram.com/optimalnathan
• Bioregulators course: https://whop.com/the-optimization-lab

Connect with Anthony Castore

• Instagram: https://www.instagram.com/anthonycastore/
• Community: https://www.skool.com/castore-built-to-adapt-7414/

For education only — not medical advice. The compounds discussed are advanced and context-dependent; work with a qualified coach and physician.