---
product_id: 11979895
title: "21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count"
brand: "21st century"
price: "$17.92"
currency: USD
in_stock: true
reviews_count: 13
category: "21st Century"
url: https://www.desertcart.us/products/11979895-21st-century-vitamin-b-12-1000-mcg-prolonged-release-tablets
store_origin: US
region: United States of America
---

# Prolonged release for sustained support 1000 mcg B12 for all-day energy Compact, easy-to-swallow tablet 21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count

**Brand:** 21st century
**Price:** $17.92
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your energy, focus, and wellness—one tablet at a time!

## Quick Answers

- **What is this?** 21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count by 21st century
- **How much does it cost?** $17.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/11979895-21st-century-vitamin-b-12-1000-mcg-prolonged-release-tablets)

## Best For

- 21st century enthusiasts

## Why This Product

- Trusted 21st century brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **One Tablet, All Day:** Prolonged release formula delivers steady B12 absorption without multiple doses.
- • **Stay Sharp & Focused:** Supports neurological function and mental clarity for peak productivity.
- • **Power Through Your Day:** 1000 mcg B12 fuels natural energy production to crush afternoon slumps.
- • **Pure & Clean Confidence:** Gluten-free, no artificial additives—just trusted, clean B12 support for your health.
- • **Effortless Daily Routine:** Tiny, easy-to-swallow tablets make consistency a breeze—no more pill struggles.

## Overview

21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets provide a potent, sustained dose of B12 to support energy metabolism, neurological health, and red blood cell formation. With 110 compact, gluten-free tablets designed for easy daily use, this supplement ensures over three months of consistent, clean B12 support to keep you sharp, energized, and thriving.

## Description

Promote healthy tissues and blood cells with 21st Century Vitamin B-12. This member of the B complex, also known as cyanocobalamin, promotes the grown and maintenance of tissue and is essential for red blood cell formation.

Review: Value + - The 21st Century B12 1000 mcg Prolonged Release Tablets are a real bargain. I’ve noticed a difference in my energy levels, and the prolonged-release formula makes them easy on the system. Good quality, effective, and very affordable—definitely recommend if you need a reliable B12 supplement.
Review: Helped me - Love them. They did the trick. My levels are back up.

## Features

- [Feel the difference in your energy] 1000 mcg B12 supports your body's natural energy production so you can power through your day without the afternoon slump
- [Your brain and nerves depend on B12] this essential vitamin supports neurological function, mental clarity, and mood so you stay sharp and focused daily
- [No more remembering to take vitamins twice] the prolonged release design means one tablet works all day, slowly releasing B12 for hours of sustained support
- [Tiny tablet, big results] the compact, easy-to-swallow size means no struggling with large capsules, making your daily health routine effortless and consistent
- [Clean formula you can trust every day] gluten free with no artificial additives, so you get pure B12 support without unnecessary ingredients or fillers
- [110 tablets means over 3 months of daily support in one purchase] stock up less often and stay consistent with your B12 routine without interruption

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0007PQARK |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #13,220 in Health & Household ( See Top 100 in Health & Household ) #73 in Vitamin B12 Supplements #1,224 in Sales & Deals |
| Brand | 21st Century |
| Brand Name | 21st Century |
| Color | No Color |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 978 Reviews |
| Diet Type | Gluten Free |
| Dosage Form | Tablet |
| Dose Release Method | Immediate Release |
| Flavor | Unflavored |
| Global Trade Identification Number | 00740985211045 |
| Item Dimensions | 2.38 x 1.75 x 3.75 inches |
| Item Form | Tablet |
| Item Weight | 55 g |
| Manufacturer | 21st Century |
| Manufacturer Part Number | 21104 |
| Model Name | 21104 |
| Model Number | 21104 |
| Number of Items | 1 |
| Pill Coating | Uncoated |
| Primary Supplement Type | Vitamin B12 |
| Product Benefits | Metabolism Improvement |
| Special Ingredients | Supports Nerve &Blood Cells. Suppor Energy & Metabloism. |
| Specific Uses For Product | Nerve |
| Supplement Formulation | Multi-Supplement |
| UPC | 740985211045 |
| Unit Count | 110 Count |

## Product Details

- **Brand:** 21st Century
- **Diet Type:** Gluten Free
- **Flavor:** Unflavored
- **Item Form:** Tablet
- **Primary Supplement Type:** Vitamin B2

## Images

![21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count - Image 1](https://m.media-amazon.com/images/I/61SOyYMP32L.jpg)
![21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count - Image 2](https://m.media-amazon.com/images/I/61KfCVssYZL.jpg)
![21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count - Image 3](https://m.media-amazon.com/images/I/71KEHwW0-wL.jpg)
![21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count - Image 4](https://m.media-amazon.com/images/I/61jBiKRhGwL.jpg)
![21st Century Vitamin B-12 1000 mcg Prolonged Release Tablets, 110 Count - Image 5](https://m.media-amazon.com/images/I/71B8CtZJqYL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Value +
*by P***T on December 16, 2025*

The 21st Century B12 1000 mcg Prolonged Release Tablets are a real bargain. I’ve noticed a difference in my energy levels, and the prolonged-release formula makes them easy on the system. Good quality, effective, and very affordable—definitely recommend if you need a reliable B12 supplement.

### ⭐⭐⭐⭐⭐ Helped me
*by A***R on June 12, 2026*

Love them. They did the trick. My levels are back up.

### ⭐⭐⭐⭐⭐ I misunderstood....
*by J***A on May 7, 2020*

I had purchased the 5000 mcg sublingual tablets and I loved the flavor and how they dissolved, but they were too potent for every day use. I prefer to take them daily so I don't lose track of when I took one, so I ordered the 1000 mcg version but I didn't realize that they were NOT sublinguals... I can take pills but I enjoyed the little fruity treat every morning...it reminded me of being a kid and taking my vitamin....now I'm back to being an old lady having to swallow a pill... but on a good note the 1000 mcg tablets do work well, and they were a great price and are easy to swallow...so I can't complain about the actual product...I just wish they had been sublingual like the 5000mcg ones...

## Frequently Bought Together

- 21st Century B 12 1000 mcg Prolonged Release Tablets, 110 Count
- 21st Century Slow Release Iron Tablets, 60 Count
- 21st Century D 5000 IU Tablets, 110 Count

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-29*