Nutrition

What to Eat During Intermittent Fasting: Complete Nutrition Guide

Learn what to eat during your intermittent fasting eating window. Complete guide to foods, meal planning, and nutrition for optimal fasting results.

16 min readUpdated January 2, 2026

While intermittent fasting doesn't have strict food rules, what you eat during your eating window significantly impacts your results. This guide covers optimal foods, meal planning, and nutrition strategies for fasting success.

Best Foods for Intermittent Fasting

Focus on nutrient-dense whole foods that provide sustained energy, keep you satiated, and support your health goals.

Protein Sources

  • Lean meats: chicken, turkey, lean beef
  • Fish: salmon, tuna, mackerel (omega-3 rich)
  • Eggs: whole eggs are excellent for fasting
  • Legumes: lentils, chickpeas, black beans
  • Greek yogurt and cottage cheese
  • Plant proteins: tofu, tempeh, seitan

Healthy Fats

  • Avocados
  • Olive oil and coconut oil
  • Nuts: almonds, walnuts, macadamia
  • Seeds: chia, flax, pumpkin seeds
  • Fatty fish
  • Nut butters (natural, no added sugar)

Complex Carbohydrates

  • Quinoa and brown rice
  • Sweet potatoes
  • Oats (steel-cut or rolled)
  • Whole grain bread and pasta
  • Vegetables: broccoli, spinach, kale
  • Fruits: berries, apples, citrus
Meal Planning TipPrepare meals in advance to ensure you have healthy options available when your eating window opens. This prevents impulsive poor food choices.

Foods to Limit or Avoid

  • Processed foods and fast food
  • Sugary snacks and desserts
  • Refined carbohydrates (white bread, pastries)
  • Sugary beverages and sodas
  • Excessive alcohol
  • Trans fats and fried foods

Sample Meal Plan

For a 16:8 schedule with a 12 PM - 8 PM eating window:

  • 12 PM - First meal: Eggs with vegetables and avocado, or Greek yogurt with berries and nuts
  • 3 PM - Snack (optional): Handful of almonds, apple with nut butter, or hummus with veggies
  • 7 PM - Dinner: Grilled protein (salmon, chicken) with roasted vegetables and quinoa or sweet potato
  • After dinner: Herbal tea if desired as you approach your fasting window

Related Topics

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Medical Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult with a qualified healthcare provider before starting any fasting regimen.

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