---
product_id: 578954641
title: "FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack"
brand: "fast:rx"
price: "¥18606"
currency: JPY
in_stock: true
reviews_count: 8
category: "Fast:Rx"
url: https://www.desertcart.jp/products/578954641-fast-rx-fasting-hydration-drink-zero-sugar-zero-calorie-electrolyte
store_origin: JP
region: Japan
---

# Zero sugar, zero calories, zero carbs Vitamins, green tea & ginseng boost Electrolyte hydration blend FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack

**Brand:** fast:rx
**Price:** ¥18606
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your fast with flavor, focus, and flawless hydration!

## Quick Answers

- **What is this?** FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack by fast:rx
- **How much does it cost?** ¥18606 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/578954641-fast-rx-fasting-hydration-drink-zero-sugar-zero-calorie-electrolyte)

## Best For

- fast:rx enthusiasts

## Why This Product

- Trusted fast:rx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Fasting Fuel:** Stay sharp and satiated with a zero-calorie, zero-carb sparkling boost that crushes hunger without breaking your fast.
- • **Hydration Meets Wellness:** Recharge your body with a clean electrolyte formula designed to keep you energized and balanced all day long.
- • **Caffeine-Calibrated Energy:** Just the right caffeine kick to keep you alert and jitter-free during long fasting hours or busy workdays.
- • **Power-Packed Nutrient Blend:** Infused with magnesium, green tea, ginseng, and essential vitamins to support focus, digestion, and GLP-1 wellness.
- • **Deliciously Sparkling Blueberry Acai:** Enjoy a refreshing, guilt-free flavor experience that elevates your fasting routine with every sip.

## Overview

FAST:RX Blueberry Acai Sparkling Fasting Electrolytes is a sugar-free, zero-calorie, and zero-carb beverage designed to support intermittent fasting and keto lifestyles. It combines clean electrolytes with a powerful blend of vitamins, magnesium, green tea, and ginseng to promote hydration, satiety, energy, and mental clarity. Perfect for professionals seeking a refreshing, nutrient-rich drink that sustains focus and fullness without breaking their fast.

## Description

Two Flavors - Bubbles or Flat! Visit the Store Two Flavors - Bubbles or Flat! Visit the Store

Review: Great product!!! - This is great. Decided to give fasting another try but I was worried about feeling nauseous like I did the last time. Using Fastrx as my base, not only did I not feel nauseous, but I felt normal. This allowed me to fast but carry on with life as usual. Will definitely be buying it again - it tastes really good and I will be trying the other flavors so I can mix and match during my next fast.
Review: Mixed reviews from those that tried it - I shared this with my coworkers. One coworker didn't enjoy the flavor and passed on it. I tried a couple cans and while I didn't really like it the first time, it was better the second time. The flavor is just okay and tastes like fake sugar. It is not really a flavor I like in sparkling water. My other coworker LOVES this and thinks it is great for fasting like the product claims. So, hard to say if I recommend it because it's really not for me but someone else I shared it with liked it.

## Features

- READY TO DRINK FASTING HYDRATION — No mixing, no powder, no measuring. FAST:RX is a full 16oz can of smooth, great-tasting electrolyte hydration made specifically for fasting — just open and drink anytime during your fast window.
- FASTING SAFE — ZERO SUGAR, ZERO CALORIES, ZERO CARBS — FAST:RX will not break your fast, spike insulin, or interfere with autophagy. Safe for intermittent fasting, prolonged fasting, OMAD, keto, and water fasting protocols — drink freely throughout your entire fast window without compromising your results.
- ELECTROLYTES + VITAMINS + MINERALS + GREEN TEA + GINSENG — More than basic sodium and potassium. FAST:RX combines essential electrolytes, magnesium, key vitamins and minerals, green tea, and ginseng to support natural energy, mental focus, and hydration — everything your body needs to get through a fast feeling strong.
- FEEL BETTER WHILE FASTING — Fasting doesn't have to mean feeling drained or foggy. FAST:RX is formulated to help you feel satisfied, refreshed, and focused during your fast — supporting your energy and wellness so you can stay on track with your goals without white-knuckling through hunger and fatigue.
- THE ONLY READY-TO-DRINK CAN BUILT FOR FASTING — While everyone else is mixing powder packets into water, FAST:RX is already in a can and ready when you are. Perfect for your morning fast, workday hydration, gym sessions, keto lifestyle, or anywhere you need clean electrolyte support without the hassle — grab a case and make fasting your superpower.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CKTZP5GR |
| Age Range Description | Adult |
| Best Sellers Rank | #122,660 in Health & Household ( See Top 100 in Health & Household ) #659 in Sports Nutrition Electrolyte Replacement Drinks |
| Brand | FAST:RX |
| Brand Name | FAST:RX |
| Caffeine Content Description | Caffeinated |
| Caffeine Content Per Serving | 30 Milligrams |
| Color | Blueberry Acai |
| Container Type | Can |
| Customer Reviews | 3.9 out of 5 stars 56 Reviews |
| Each Unit Count | 12 |
| Flavor | Sparkling - Blueberry Acai |
| Flavored Drink Type | Carbonated Flavored Drink |
| Item Form | Liquid |
| Item Package Quantity | 12 |
| Item Package Weight | 5.81 Kilograms |
| Item Type Name | Beverage |
| Item Volume | 16 Fluid Ounces |
| Liquid Contents Description | Nutrient Enhanced Water Beverage |
| Manufacturer | GIVN Goods |
| Net Content Volume | 16 Fluid Ounces |
| Number of Items | 12 |
| Number of Pieces | 12 |
| Package Information | Can |
| Package Size Name | 12-Pack |
| Package Type | Custom |
| Package Type Name | Can |
| Product Shelf Life | 365 Days |
| Special Ingredients | De-sugared Lemon Juice, Green Tea Extract, Panax Ginseng, Apple Cider Vinegar, Trace Minerals |
| Specialty | Gluten Free |
| Specific Uses For Product | Hydration |
| Sweetness Description | Not Sweet |
| Tea Variety | Green |
| UPC | 855778006415 |
| Unit Count | 192.00 Fluid Ounces |

## Product Details

- **Brand:** FAST:RX
- **Flavor:** Sparkling - Blueberry Acai
- **Item Form:** Liquid
- **Number of Items:** 12
- **Package Information:** Can

## Images

![FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack - Image 1](https://m.media-amazon.com/images/I/71nwGQ9BQiL.jpg)
![FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack - Image 2](https://m.media-amazon.com/images/I/61aS9TBq-UL.jpg)
![FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack - Image 3](https://m.media-amazon.com/images/I/71Zbd+nrG8L.jpg)
![FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack - Image 4](https://m.media-amazon.com/images/I/71+2wF9o3dL.jpg)
![FAST:RX Fasting Hydration Drink | Zero Sugar Zero Calorie Electrolyte Drink with Vitamins & Minerals | Keto & Intermittent Fasting | Blueberry Acai | Sparkling | 16oz 12-Pack - Image 5](https://m.media-amazon.com/images/I/71EPnDJdcuL.jpg)

## Available Options

This product comes in different **Flavor** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product!!!
*by M***W on May 14, 2026*

This is great. Decided to give fasting another try but I was worried about feeling nauseous like I did the last time. Using Fastrx as my base, not only did I not feel nauseous, but I felt normal. This allowed me to fast but carry on with life as usual. Will definitely be buying it again - it tastes really good and I will be trying the other flavors so I can mix and match during my next fast.

### ⭐⭐⭐⭐ Mixed reviews from those that tried it
*by A***F on May 4, 2024*

I shared this with my coworkers. One coworker didn't enjoy the flavor and passed on it. I tried a couple cans and while I didn't really like it the first time, it was better the second time. The flavor is just okay and tastes like fake sugar. It is not really a flavor I like in sparkling water. My other coworker LOVES this and thinks it is great for fasting like the product claims. So, hard to say if I recommend it because it's really not for me but someone else I shared it with liked it.

### ⭐ Sweetener is on the really bad list.
*by B***S on July 16, 2025*

I please ask to stop using erythritol as the sweetener. All I see is it can cause stroke all over the news. Kills all the great other ingredients.

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**Shop now:** [https://www.desertcart.jp/products/578954641-fast-rx-fasting-hydration-drink-zero-sugar-zero-calorie-electrolyte](https://www.desertcart.jp/products/578954641-fast-rx-fasting-hydration-drink-zero-sugar-zero-calorie-electrolyte)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-05-23*