• FAST:RX Sparking Blueberry Acai Zero Sugar Keto drink Hydrating fasting water transparent
  • FAST:RX Sparking Blueberry Acai Zero Sugar Keto drink Hydrating fasting water transparent
  • FAST:RX Sparking Blueberry Acai Zero Sugar Keto drink Hydrating fasting water transparent
  • FAST:Rx Bluebery sparking Supplement fasting drink
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Blueberry Acai - Sparkling (12 pack)

Blueberry Acai - Sparkling (12 pack)

Nutrient-infused hydration for fasting and keto. Formulated to provide essential nutrients and electrolytes while keeping your body in a fasting state (and yes, ketosis too!), FAST:RX is the convenient ready-to-drink sidekick that helps you stay hydrated, healthy, and focused while you strive to be your best self.

Sparkling Still
1 case
12 x 16oz
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Details

FAST:RX supports intermittent and prolonged fasting, and will not break your fast, spike insulin, or interfere with autophagy. FAST:RX is not recommended for gut-rest fasting - a future formula for gut-rest fasting is in the works. FAST:RX is also keto-friendly, helps limit the effects of the "keto flu", relieves dry mouth, and provides natural energy to help you fight fatigue and find focus.

Shipping & Delivery

Shipping Policy:

FAST:RX offers free standard ground shipping through FedEx and/or UPS for orders with most FAST:RX products. Our goal is to ship within 2 days, but sometimes due to sales or holidays it may take up to 3-4 business days. Transit times are typically 2-5 business days. Once your item has been shipped you will receive an email with the tracking number. This will update every 24 hours. Please note: your order may arrive in multiple boxes.


Refund Policy:

We do not accept returns or exchanges for products purchased through our store. If you have any questions prior to placing an order, please reach out to us at hello@drinkfastrx.com and we will be happy to help!

Assistance

Oopsie Policy:

If we messed up and shipped the order incorrectly or if your order got damaged in-transit, please let us know within 5 days of receiving your order by sending an email to hello@drinkfastrx.com and we’ll make it right. Please provide as much detail as possible and photos.

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FAQs

What can I drink while intermittent fasting?

Water, black coffee, plain tea, and fasting-safe electrolyte drinks are all compatible with intermittent fasting. Avoid anything with sugar, juice, or milk — these spike insulin and break your fast. FAST:RX was built specifically for fasting windows — clean electrolytes, zero sugar, zero calories.

Do electrolytes break a fast?

No — pure electrolytes contain no calories and don't trigger an insulin response. The key is making sure your electrolyte drink has no added sugar or sweeteners. FAST:RX is formulated with exactly that in mind — fasting-safe sodium, potassium, and magnesium.

What breaks a fast?

Anything that triggers an insulin response breaks a fast — sugar, calories, and certain sweeteners are the main culprits. Water, black coffee, plain tea, and zero-calorie electrolyte drinks are safe. FAST:RX contains none of the ingredients that break a fast, making it the go-to drink for fasting windows.

How do I avoid hunger during a fast?

Fasting hunger is usually driven by electrolyte depletion and dehydration, not true caloric need. When sodium and magnesium drop, your body sends false hunger signals. Replenishing electrolytes with a fasting-safe drink like FAST:RX can significantly reduce cravings without breaking your fast.

What are the best electrolytes for fasting?

Sodium, potassium, and magnesium are the three electrolytes most depleted during fasting and the most important for energy, focus, and avoiding cramps. The key is getting them without sugar or calories that would break your fast. FAST:RX was formulated specifically around these three for exactly that reason.