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Choosing Your Fasting Window: 16:8 vs. 18:6

Written by Khris
Updated this week

At Reverse Health, we believe the most effective fasting schedule isn't the one that’s "hardest," but the one that fits seamlessly into your life as a woman. Both 16:8 and 18:6 are popular protocols, but choosing between them depends on your unique lifestyle and how your body responds to metabolic shifts.


Understanding the Methods

  • The 16:8 Method: You enjoy your meals within an 8-hour window and fast for the remaining 16 hours. This is often the "sweet spot" for many women starting their journey.

  • The 18:6 Method: This narrows your eating window to 6 hours, extending the fast to 18 hours. This deeper fast can further encourage the body to tap into stored fat for energy.

Which One Is Right for You?

There is no "perfect" protocol—only the one that makes you feel empowered and energized. Here are the key factors to consider when selecting your path in the app:

1. Your Experience Level

If you are new to intermittent fasting, start with 16:8. At Reverse Health, we prioritize consistency over intensity. It’s better to be 100% successful with a shorter fast than to struggle with a longer one. You can always shorten your window later as your body adapts.

2. Sustaining Your Energy

Fasting should make you feel "zestful," not drained.

  • Try 16:8 if you find you need a bit more fuel to get through a busy morning or a late-afternoon workout.

  • Try 18:6 if you notice that you feel sharper and more focused during a fasted state.

3. Lifestyle Integration

The best nutrition strategy is one that doesn't feel like a chore. Consider your daily routine:

  • Does a shorter window (18:6) help you stay productive at work?

  • Does a wider window (16:8) allow you to enjoy dinner with your family without stress? Tip: Tailor your fasting to your life, not your life to your fasting.

4. Weight Loss & SMART Goals

While a longer fast (18:6) can sometimes accelerate weight loss by making it easier to maintain a calorie deficit, both methods work effectively when paired with our meal plans. Focus on SMART goals:

  • Specific

  • Measurable

  • Achievable

  • Relevant

  • Time-bound


The Reverse Health Takeaway: Success comes from what you can sustain long-term. Whether you choose 16:8 or 18:6, the goal is to create a healthy relationship with food that supports your metabolic health and helps you feel your best every day.

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