The Fasting Lifestyle

Whether you want to boost energy, reduce markers of inflammation, accelerate cellular repair, or improve body composition, we’re here to help you tap into your potential.  

Dozens of peer-reviewed studies indicate that fasting can be an effective tool to mitigate risk for metabolic disease.

Our Fasting Experts

Dr. Peter Attia

Leading the applied science of longevity

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Our Fasting Experts

Dr. Rhonda Patrick

Translating complex scientific topics

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Our Fasting Experts

Nicole Grant, RD

Guiding our community's nutritional needs

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Our Fasting Experts

Kristi Storoschuk

Educating audiences on metabolic health

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Your body is built to fast

Three Meals a Day is a Modern Accident

Our metabolisms are programmed for periods of feast and famine. Unlike constantly-grazing cows with four stomachs, we aren’t built to maintain a constant drip of food.


Our Responsible Fasting Pillars

We’re committed to making fasting accessible to all who stand to benefit by providing education, guidance, and support.

This includes looking out for our fellow fasters to make sure we’re all developing safe and responsible fasting practices.


Consult with your physician before fasting

It’s always a good idea to speak to a healthcare professional before making significant changes to your diet and lifestyle. If you have a preexisting health condition, fasting may not be right for you.


Clarify your ‘Why’ for fasting

What do you hope to accomplish by fasting? Having a clear goal will help you make safe and informed choices about what type of fasting is right for you. When you’re conscious of the result you’re looking to achieve, you can find a practice that best aligns with these goals.


Treat fasting as a lifestyle, not a quick fix

Fasting may provide immediate physical and cognitive benefits, but a responsible fasting practice is sustainable, meaning the duration and frequency can be maintained over the long-term. Rather than using fasting as a one-time diet, think of it as a tool for lifelong health.


Start slow, and listen to your body

Fasting isn’t a competition. If you’re new to fasting, start slow and incrementally increase your duration and frequency over time. If you end a fast early, that’s okay too.


If you experience negative side effects, stop fasting

It’s natural to feel a bit of discomfort during a fast. If you have any concerns about irregular physical sensations or side effects during a fast, it’s time to end your fast and consult with your physician.


Drink plenty of water and ensure proper supplementation

Hydration is essential for a safe fasting practice. Make sure you’re consuming adequate water, and consider supplementing with sodium and magnesium to avoid mild side effects such as headaches and cramps.


Consume adequate calories when you’re not fasting

Always consume a healthy amount of nutritious food when you’re not fasting. If you’re fasting regularly and often have a compressed feeding window, this may require consuming higher calorie meals than usual.


Eat mindfully and enjoy food without guilt

Food is delicious, and it should be! Celebrate the nourishment and comfort that good food provides. Shared food experiences are part of our social fabric—when you’re not fasting, fully enjoy your meals with friends and loved ones.


Treat fasting as one part of a healthy lifestyle, not a cure-all

Fasting responsibly will help you take charge of your health, but there are other components that contribute to a healthy lifestyle. Quality sleep, nutritious food, adequate exercise, and stress reduction practices are equally important for your emotional, cognitive, and physical health.


Fast with intention, not emotion

Fasting should emanate from self-love and thoughtful intention. Fast for yourself, not to satisfy the expectations or pressure of others. If you’re in a place of emotional distress or vulnerability, it’s not the right time to develop a fasting practice.


Make sure you’re fasting for the right reason

We recognize that relationships with food, nutrition, and weight can be complicated, and Zero should not be used to: achieve extreme or rapid weight loss, abstain from eating for psychological reasons, facilitate recurring episodes of under- or overeating, or to create persistent distress regarding your weight or body measurements.

If you, or someone you know, is struggling with their relationship with food, nutrition, or weight, please seek help from your physician, a mental health professional, or the National Eating Disorder Association (NEDA)


We're all here to help

Don’t let fasting be an isolated experience. When the going gets tough, know you’re not alone. There are hundreds of thousands of people fasting with Zero everyday, and you can find many of them in the #FastingwithZero Facebook group, on our blog and on Instagram sharing their experiences and answering questions. You can also reach us anytime at [email protected] and we’ll do everything in our power to help.

The simple truth is every body responds to fasting a little differently.

Genetics, health, lifestyle…all these things play a part. But for a healthy person embarking on a fasting journey, there’s a general timeline of events—a predictable set of metabolic responses as your fast stretches from hours into days.

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