Let's talk about Erythritol, Please

Let's talk about Erythritol, Please

Let's be clear, there hasn't been any comprehensive study indicating significant health risks associated with erythritol when consumed in moderate amounts. Erythritol has undergone extensive safety evaluations by regulatory agencies such as the U.S. Food and Drug Administration (FDA), the European Food Safety Authority (EFSA), and others, which have generally affirmed its safety for human consumption. Thomas DeLauer has a great explanation here.

Erythritol, the ingredient in our fasting drink FAST:RX, typically does not spike insulin levels. Unlike sugar (sucrose) or other carbohydrates, erythritol is a sugar alcohol that is not metabolized in the same way by the body. When consumed, erythritol is absorbed into the bloodstream from the small intestine and then excreted unchanged in the urine. It does not significantly affect blood sugar or insulin levels, making it a suitable sweetener for individuals with diabetes or those following a low-carbohydrate or ketogenic diet. Learn more on VeryWellFit.

So, it's really about this:
1. Erythritol is a type of carbohydrate called a sugar alcohol.
2. Erythritol is not fully absorbed by the body. Instead, it passes through the digestive system mostly unchanged. Because of this, erythritol has an insignificant effect on blood sugar and insulin levels. When erythritol is consumed, it doesn't spike insulin levels like carbs usually do. Therefore, in the context of calculating net carbs, the grams of erythritol are subtracted from the total carbohydrates.
3. FAST:RX contains 7 grams of total carbohydrates per serving from Erythritol. 
4. 7g total carbs - 7g Erythritol = 0g Net Carbs in FAST:RX

 

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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.