Flexible Dieting (IIFYM)
If It Fits Your Macros — a flexible approach where no food is off-limits as long as you hit your daily macro targets (protein, carbs, fat).
Goal of the plan
Source best-for note: Sustainability, body composition, athletes, people who dislike rigid diets.
Who it is for
The source category is Macro-Based, with difficulty marked Moderate.
Example meals and foods
The source plan does not prescribe a fixed macro split.
Meal timing: Flexible — any meal frequency that hits daily targets.
- Anything that fits your macros
- Emphasis on 80% whole foods
- Lean proteins
- Complex carbs
- Healthy fats
- Treats in moderation
Foods to limit or adapt
- Nothing strictly forbidden
- Minimize trans fats
- Limit excessive alcohol
Grocery guidance
Suggested additionBuild a simple list around the foods you already enjoy, then add one or two easy repeatable meals before trying to overhaul everything.
Hydration guidance
Suggested additionKeep water available through the day and adjust fluids around heat, sweat rate, long runs, and higher-fiber meals.
Flexibility and sustainability
Suggested additionRequires macro tracking (app recommended). Quality still matters — 80/20 rule. Most popular among fitness enthusiasts.
Individual nutrition note
Suggested additionNutrition advice should be adapted to the individual. Consider medical history, medications, preferences, budget, culture, and support from a qualified clinician or dietitian when needed.
