A science-backed nutrition guide for adults over 70 — built around the leucine threshold that switches on muscle protein synthesis.

Includes the Leucine Meal Builder interactive app, delivered with your purchase.

🎁 Included Free: The Leucine Meal Builder

Your interactive companion to the book — included with every purchase.

Reading about leucine is one thing. Knowing whether your lunch actually hits the threshold is another.

The Leucine Meal Builder lets you find out in real time. Search 132 everyday foods, build your plate, and watch a live meter fill toward the 2.7g leucine trigger point that switches on muscle protein synthesis after 70. When it turns green — your meal is working for your muscles.

Inside the tool:

132 foods across 9 groups — including whey protein options
A live leucine threshold meter
Works on phone, tablet, or computer — no app store, no download

Your full access link is delivered with your book the moment you purchase.

The Leucine Factor