Q

What is the primary factor that determines muscle retention during a caloric deficit?

From 5 years of verified research · Vassili Sandqvist
A

Natural cutting is predominantly influenced by your testosterone levels. When you create a caloric deficit, your body perceives it as a threat, triggering catabolic hormones like cortisol that can break down muscle tissue. The effectiveness of testosterone in protecting muscle fibers varies significantly among individuals, largely due to genetics.

This is one answer. The complete system — the psychology, the biology, and the method — is in the book.

Read The Willpower Lie →
Found an error? Let me know →