Frequently Asked Questions

About Fastful

Fastful bars are nutrition bars designed to optimize your macronutrients and control your appetite.

Fastful is a pre-fasting nutrition product to be used prior to the start of an intermittent fast (those typically ranging from 12 to 24 hours). These innovative bars work by optimizing your macronutrients, thus keeping you fuller, longer. Simply enjoy Fastful following a meal, and then begin your fast. Your fast should be easier, and longer fasting periods should be attainable.

Yes. You can enjoy a Fastful bar each day, assuming you're fasting daily. There's nothing artificial, so it's a great addition to your fasting routine.

Fastful makes intermittent fasting easier. Intermittent fasting is known to help people achieve their weight loss goals.

Fastful is manufactured at a state-of-the-art facility in Illinois (United States).

You can purchase the pre-fasting nutrition bars on our website at and select retailers

No. Fastful bars are meant to complement your final meal before beginning a fast.

Pre-Fasting™ is how we define the act of preparing your body for a fast. Satiety, or the feeling of being full, is achieved by maximizing certain macronutrients such as protein and fiber. By leveraging many natural superfoods, Fastful bars deliver the ideal blend of macronutrients while keeping the calories as low as possible.

About The Bars

Fastful bars are delicious and sweet, but not overly sweet like other bars. They're chewy, but not too chewy. Additionally, they're very natural tasting because there aren't any artificial ingredients.

Micellar casein is the slowest digesting protein found in dairy. It's added to Fastful to keep you fuller, longer. For many people, this simply means getting from dinnertime to bedtime without feeling the need to snack. Whey protein isolate is also included in Fastful, which is the fastest digesting protein found in dairy. This is added to satisfy hunger quickly following a meal.

Yes. All Fastful bars are certified Gluten Free.

No, Fastful does not contain GMO's, added sugar, eggs or soy.

Fastful bars are best stored at room temperature, in a dry environment. They are perfect for the gym bag or handbag, and are great when on the go.

Yes. All fastful bars contain tree nuts (almonds) and our Chocolate Peanut Butter flavor also contains peanuts.

There is a small amount of sugar alcohols in our bars, all of which are easy to digest.

No. Fastful bars are not manufactured in a Kosher facility so Kosher certification is not possible at this time.

Although Fastful is derived from dairy, the amount of lactose contained is actually very small. Most people who are lactose intolerant are able to enjoy Fastful without concern. However, if you have an actual dairy allergy, or you're extremely lactose intolerant and are not able to handle trace amounts of lactose, then it's best to not consume Fastful.

Intermittent Fasting

We've put together an ultimate fasting guide to help you with your fasting journey. However, we always recommend consulting with your physician before starting a fasting lifestyle.

Nobody! We are the only brand in the world to offer an easier, more convenient way to intermittent fast through pre-fasting nutrition™.

We always recommend consulting a physician before beginning a fasting lifestyle.

There are numerous benefits of intermittent fasting, including increased energy, fat loss, improved cardiovascular function, and much more. Fastful does not endorse intermittent fasting for everyone, please consult a physician to find out if intermittent fasting is right for you.

Always consult your physician before beginning an intermittent fasting routine. Also, consider starting with smaller fasting periods and gradually extending them as you gain comfort.

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