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Intermittent Fasting (IF)
Intermittent fasting alternates fasting intervals with eating windows (for example 16:8). Evidence on weight and metabolic markers is mixed at the population level; adherence and safety depend on context.
Recent guideline & evidence context: Recent years highlight that fasting benefits vary by age, sex, muscle mass, medications, and mental health—professional guidance matters, especially with diabetes drugs or disordered-eating history.
📊 Macros targetDepends on foods chosen during the eating window—not inherently macro-defined.
Content last reviewed for general education:
Who it may suit
- Adults who prefer timing structure over constant macro tracking.
- Some people whose clinicians approve fasting windows alongside monitoring.
Use extra caution / often not ideal
- Disordered eating history or binge-restrict cycles.
- Medications or insulin requiring food at fixed times—must coordinate.
Clinical note: Pregnancy, breastfeeding, underweight, adolescence, and glucose-lowering drugs need individualized rules.
Foods to Eat
- Water, plain tea, black coffee during fasting windows if your clinician agrees
- Balanced meals in the eating window
Foods to Avoid
- Caloric drinks during fasting if you are doing a true fast window
- Compensatory bingeing on ultra-processed foods in the eating window
💡 Pro Tips for Success
- Start with modest windows; adjust with professional input.
- Break fasts with protein and fiber, not just sugar.
- Sleep and stress still drive outcomes—timing is only one lever.
🍽️ 1-Day Sample Menu
Breakfast
(If 16:8) Black coffee until your window opens.
Lunch
Large salad with beans, olive oil, protein.
Dinner
Fish, vegetables, whole grain if tolerated.
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