fasting drink

The very first fast

Recently, someone left an Amazon testimonial for FAST:RX about how it helped them feel less groggy and irritable while fasting. It's hilarious to look back on how far our fasting hydration drink FAST:RX has come. It all started with the very first fast that the founders did, who were very groggy and irritable! Here's what happened in their own words:

1. Physical fatigue

We had a plan. We did the research. It still SUCKED. We weened down for 4 weeks. Slowly eating less and less amounts of heavy foods. We practiced increasing our hydration. We knew it would be hard, but the first 24 hours were brutal. Our stomachs ached, and we felt nauseous. While trying to find a way to feel a little better, the experts told us to "drink more water". 

2. Energy level

We felt winded climbing a flight of stairs. We actually thought we might have to call an ambulance (not kidding!). We tried to find a way to boost energy, and the experts to us to "drink more water".

3. Mental state

Every day was like Monday morning. It was difficult to focus. It was almost impossible to work. We tried to find a solution to the brain fog, and the experts to us to "drink more water".

"Drink More Water" they all said. Impossible, we said! We hydrated, and hydrated, and hydrated. However, we still felt incredibly sick when fasting. So, we took our experience and our beverage making chops and told ourselves to get to work. To make a beverage that would hydrate during fasting and target the main challenges we experienced. FAST:RX helps us feel better when fasting as our go to fasting / keto drink, and we hope it helps you, too. Let us know!

 

Use code FAST20OFF for 20% off your first order. Try it. Drink it. Fast with it, and then let us know how we did for YOU.

 

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Frequently Asked Questions

Does FAST:RX break a fast? 

No — FAST:RX is completely fasting-safe. It contains zero sugar, zero calories, and no ingredients that trigger an insulin response,
so you can drink it throughout your entire fasting window without interrupting
fat burning or ketosis.




What can I drink during intermittent fasting? 

Water, black coffee, plain tea, and fasting-safe electrolyte drinks are all compatible with intermittent fasting. FAST:RX is
specifically formulated for fasting — it replenishes your electrolytes without
any sugar or calories that would break your fast.

Why do I feel tired and hungry while fasting? 

Fatigue and hunger during fasting are most often caused by electrolyte depletion, not true caloric need. When sodium, magnesium, and potassium drop, your body sends hunger and fatigue signals. Replenishing electrolytes with FAST:RX can dramatically reduce these symptoms without breaking your fast.

Do electrolytes break a fast? 

No — electrolytes in their pure form contain no calories and do not trigger insulin. FAST:RX delivers sodium, potassium, and
magnesium in a completely fasting-safe formula, making it the ideal companion
for any fasting protocol.

What is the best electrolyte drink for fasting? 

The best electrolyte drink for fasting is one with no sugar, no artificial sweeteners, and no calories — formulated specifically for
the fasting state. FAST:RX was built from the ground up for fasters, with the
exact electrolyte balance your body needs during a fasting window.

How do I stop feeling dizzy when fasting? 

Dizziness during fasting is almost always a sign of low sodium or magnesium. Drinking plain water can actually make this worse by
further diluting your electrolytes. The fix is to add electrolytes — FAST:RX is
designed to restore balance quickly so you can get through your fast feeling
clear and energized.

Is intermittent fasting safe? 

Intermittent fasting is safe for most healthy adults and is backed by a growing body of research showing benefits for metabolic
health, weight management, and longevity. Always consult your doctor if you
have underlying health conditions. Supporting your fast with proper hydration
and electrolytes like FAST:RX makes it safer and more sustainable.