Restrictive diets produce short-term weight loss and long-term weight regain in 95%+ of users. The pattern is consistent across approaches — calorie restriction, keto, paleo, intermittent fasting all produce similar outcomes once followed long enough. The mechanism of failure is similar: restriction triggers compensatory behaviours over time.
Why restriction fails
Metabolic adaptation (body reduces energy expenditure to match lower intake). Hormonal changes (leptin drops, ghrelin rises — drives hunger). Psychological depletion (willpower is finite). Social and cultural friction (eating differently from peers).
What works instead long-term
Modest sustainable changes (not 'cut 500 calories' but 'eat protein at each meal'). Habits over rules. Movement that you enjoy. Sleep adequacy. Patience with slow changes.
If you've tried multiple restrictive diets, the issue isn't your willpower — it's the approach. Sustainable change is slower and less dramatic than diet marketing promises, and it works.