Intermittent Fasting (16:8)

An eating pattern that cycles between 16 hours of fasting and an 8-hour eating window. Not a diet per se — it dictates when you eat, not what you eat.

In this guide8 sections
  1. 01Goal of the plan
  2. 02Who it is for
  3. 03Example meals and foods
  4. 04Foods to limit or adapt
  5. 05Grocery guidance
  6. 06Hydration guidance
  7. 07Flexibility and sustainability
  8. 08Individual nutrition note
Real person preparing a salad in a kitchen
Real person preparing a salad in a kitchen. Source: https://commons.wikimedia.org/wiki/File:20111025-FNS-RBN-1967_-_Flickr_-_USDAgov.jpg. 20111025-FNS-RBN-1967 - Flickr - USDAgov by U.S. Department of Agriculture, Public domain. Sourced from Wikimedia Commons.

Goal of the plan

Source best-for note: Weight loss, simplicity, metabolic health, autophagy.

Who it is for

The source category is Time-Restricted, with difficulty marked Easy.

Example meals and foods

The source plan does not prescribe a fixed macro split.

Meal timing: All food consumed within 8-hour window (e.g., 12pm-8pm).

  • Any whole foods during eating window
  • Water during fasting
  • Black coffee
  • Unsweetened tea
  • Focus on nutrient-dense meals

Foods to limit or adapt

  • Anything with calories during fasting window
  • Excessive junk during eating window

Grocery guidance

Suggested addition

Build 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 addition

Keep water available through the day and adjust fluids around heat, sweat rate, long runs, and higher-fiber meals.

Flexibility and sustainability

Suggested addition

May not suit people with blood sugar issues. Can be combined with any diet style. Skip breakfast approach is most common.

Individual nutrition note

Suggested addition

Nutrition advice should be adapted to the individual. Consider medical history, medications, preferences, budget, culture, and support from a qualified clinician or dietitian when needed.