---
product_id: 10970598
title: "Vitamin C Powder with Q-C, Healthy Immune System, Brain, Eyes, Heart and Circulation, Joints, Sourced from Scotland, 250G, 8.8 Ounce"
brand: "doctor's best"
price: "฿2622"
currency: THB
in_stock: true
reviews_count: 13
category: "Doctor's Best"
url: https://www.desertcart.co.th/products/10970598-vitamin-c-powder-with-q-c-healthy-immune-system-brain
store_origin: TH
region: Thailand
---

# Vegan, Non-GMO, Gluten & Soy Free Q-C sourced from Scotland 1000mg Vitamin C per serving Vitamin C Powder with Q-C, Healthy Immune System, Brain, Eyes, Heart and Circulation, Joints, Sourced from Scotland, 250G, 8.8 Ounce

**Brand:** doctor's best
**Price:** ฿2622
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your immunity with Scotland’s finest Vitamin C boost!

## Quick Answers

- **What is this?** Vitamin C Powder with Q-C, Healthy Immune System, Brain, Eyes, Heart and Circulation, Joints, Sourced from Scotland, 250G, 8.8 Ounce by doctor's best
- **How much does it cost?** ฿2622 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/10970598-vitamin-c-powder-with-q-c-healthy-immune-system-brain)

## Best For

- doctor's best enthusiasts

## Why This Product

- Trusted doctor's best brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Flexible Powder Form:** Easily dissolves and lets you customize your dosage for daily maintenance or rapid immune boosts—never miss a beat.
- • **Clean & Conscious Formula:** Vegan, gluten-free, soy-free, and non-GMO—crafted for the mindful professional who demands purity without compromise.
- • **Pure Powerhouse Antioxidant:** Boost your body's defense with 1000mg of potent Vitamin C per serving, enhancing antioxidant capacity and fighting oxidative stress.
- • **Premium Scottish Q-C Quality:** Experience the trusted, high-quality Vitamin C sourced directly from Scotland, ensuring purity and reliability in every scoop.
- • **Tailored Immune & Vitality Support:** Supports brain, eyes, heart, joints, and circulation—because your wellness deserves a holistic boost.

## Overview

Doctor's Best Vitamin C Powder with Q-C delivers 1000mg of high-quality, Scottish-sourced Vitamin C per serving, designed to support immune health, antioxidant protection, and overall vitality. This vegan, non-GMO, gluten- and soy-free formula dissolves easily for customizable dosing, making it the perfect clean supplement for busy professionals seeking reliable wellness support.

## Description

Vitamin c is a key compound in the body's "antioxidant network," a chain of synergistic, inextricability linked, well-studied antioxidants that includes glutathione (GSH) and vitamin e. When vitamin e uses its antioxidant function in neutralizing free radicals, it also loses this antioxidant function. Vitamin c can change this status; it can regenerate vitamin e back to its native form, and is thought to "spare" glutathione in the body as well. Importantly, when ascorbate donates an electron and becomes itself oxidized, or "consumed," the ascorbate radical is relatively harmless. In a double-blind, placebo-controlled study in which blood GSH was measured in healthy subjects at several stages, 500 mg of vitamin c taken daily for 2 weeks significantly raised erythrocyte (red blood cell) glutathione levels. The researchers concluded that vitamin c supplementation at that level can benefit the overall antioxidant capacity of the blood.

Review: This is a good choice for vit c mix - Great choice, dissolves well and does not affect the flavor of another drink. Just mix a level scoop as directed.
Review: Love it! - I've been using Doctor's Best Vitamin C Powder consistently, and it has become my go-to vitamin C supplement. First and foremost, I really appreciate that it it vegan and comes in powder form. I feel this powder dissolves easily in water and is quickly absorbed by the body. I definitely notice a faster response when I’m feeling run down or need an immune boost. Another reason I keep repurchasing this is the high quality of the product. It's pure, no artificial ingredients, which gives me confidence that I'm getting a clean and effective supplement. Also, since it's powder, I can adjust the dosage based on my needs—whether it's a small maintenance dose or a larger amount when I feel a cold coming on. It’s also gentle on my stomach. I will definitely keep purchasing this vitamin c. Love it

## Features

- VITAMIN C WITH Q-C - Doctor’s Best Vitamin C contains Q-C, which is manufactured in Scotland and prized for its high quality and reliability. Vitamin C is known for immune health support and antioxidant support.*
- IMMUNE SUPPORT- Vitamin C is essential for the synthesis of collagen, carnitine, and certain brain chemical transmitters, provides fundamental support for the brain, eyes, skin, heart, circulation, and immune system.*
- POWERFUL ANTIOXIDANT - Ascorbic acid is vital to the body for its role as an electron donor, supporting metabolic enzymes, enhances the body's antioxidant potential, also protects against free radical damage, which can lead to oxidative stress.*
- TRUSTED AND PURE - 1000mg of Vitamin C with Q-C each serving. Gluten Free, Non-GMO, Soy Free, Vegan. Doctor's Best is committed to the safety of all of our products, offering a clean and reliable supplement for your well-being.
- IMPORTANT NOTE: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B00HNS1E0W |
| Best Sellers Rank | #28,248 in Health & Household ( See Top 100 in Health & Household ) #208 in Vitamin C Supplements #2,156 in Sales & Deals |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,304) |
| Date First Available  | January 3, 2014 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | DRB-00333 |
| Manufacturer  | Doctor's Best |
| Product Dimensions  | 3.19 x 3.19 x 4.5 inches; 8.8 ounces |

## Product Details

- **Brand:** Doctor's BEST
- **Diet Type:** Gluten Free
- **Flavor:** Unflavored
- **Item Form:** Powder
- **Primary Supplement Type:** Vitamin C

## Images

![Vitamin C Powder with Q-C, Healthy Immune System, Brain, Eyes, Heart and Circulation, Joints, Sourced from Scotland, 250G, 8.8 Ounce - Image 1](https://m.media-amazon.com/images/I/61bCXhZ3uTL.jpg)

## Questions & Answers

**Q: Is this product 100% corn free?**
A: No, it is not corn-free.  It says on the Quali-C website that Quali-C is sourced from non-gmo cornfields.  http://www.dsm.com/products/quali-c/en_US/about-quali-c/traceability.html

**Q: Some people are saying this isn't real vitamin c, what is quali-c? why doesnt it dissolve in water?**
A: The Vitamin C recommended by the Vitamin C Foundation is a Quali-C product, and a quick search of "ascorbic acid" shows it to be synonymous with Vitamin C, so the argument that Quali-C is not real Vitamin C seems untenable. As for its solubility in water, it dissolves almost instantly in hot water.

**Q: Doctor's best is owned by a multi-national, food conglomerate company.  how can i trust that this product is truly quali-c from scotland?**
A: The label indicates it was manufactured in Scotland. Unless they are giving false information on the label, I will have to assume that it is true. I have been unable to find another vitamin c powder that is certified non-GMO that is not made in China from corn, it seems to work fine for me, no colds or flus or infections for over 2 years since I have been taking it.   I suggest you contact Doctors Best directly with any questions, if you can trust what they tell you. Hope this is of help. The main thing is to avoid vitamins from China.

**Q: Is this L-ascorbic acid?**
A: We are happy to help.  The Doctor's Best Vitamin C Powder is ascorbic acid using the branded Quali-C.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This is a good choice for vit c mix
*by C***. on December 30, 2025*

Great choice, dissolves well and does not affect the flavor of another drink. Just mix a level scoop as directed.

### ⭐⭐⭐⭐⭐ Love it!
*by H***R on July 31, 2025*

I've been using Doctor's Best Vitamin C Powder consistently, and it has become my go-to vitamin C supplement. First and foremost, I really appreciate that it it vegan and comes in powder form. I feel this powder dissolves easily in water and is quickly absorbed by the body. I definitely notice a faster response when I’m feeling run down or need an immune boost. Another reason I keep repurchasing this is the high quality of the product. It's pure, no artificial ingredients, which gives me confidence that I'm getting a clean and effective supplement. Also, since it's powder, I can adjust the dosage based on my needs—whether it's a small maintenance dose or a larger amount when I feel a cold coming on. It’s also gentle on my stomach. I will definitely keep purchasing this vitamin c. Love it

### ⭐⭐⭐⭐⭐ Really good vitamin C
*by T***N on November 23, 2025*

Great product, great ingredients value a super, and have ordered this multiple times.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-23*