Fat adaptation means becoming efficient at burning fat rather than relying on glucose. Research by Volek shows it takes weeks to months: increased mitochondrial density, upregulated enzymes, improved ketone production. Once adapted, you experience stable energy, reduced hunger, easier fasting. Two paths: extended carbohydrate restriction or regular fasting — most combine both.
This companion covers the two fuel systems, physiological changes, timeline, how to get there, and signs of adaptation. (3 min read)
Written by AI, directed and approved by me. How this is made →