Habits beat plans. Always have.
Behavioral science is unambiguous: the diets that work are the ones people stay inside for years. Not weeks.
What separates a 90-day program from a 9-year practice is not willpower. It is the friction of the act itself — how easy it is to do the small thing, the next day, even when life is loud.
Habit formation is a logging problem before it is a nutrition problem. The graph keeps you honest. The streak keeps you brittle.
The science says
66 days
Average time for a new behavior to become automatic, per the Lally et al. study at University College London. The diet apps that disappear from your phone in week six are optimizing for the wrong window.