Doctor's Best Pure Vitamin C Powder with Quali-C offers pure ascorbic acid for immune support and antioxidant protection, helping daily resilience and overall wellness. Quali-C is produced in Scotland using pharmaceutical grade manufacturing, giving this vitamin C supplement a purity and reliability that tablets can't always match. With independent quality checks and decades of science-based nutrition experience, Doctor's Best delivers transparency and consistency.

Available Sizes & Variants:

250 grams vitamin C powder – generous supply for daily immune support.

Benefits & Features:

• Pure vitamin C supplement for daily immune support.
• Easy to mix with water, juice, or smoothies, the powder option lets you tailor your dose to your needs.
• Quali-C sourced in Scotland ensures pharmaceutical grade purity you can trust.
• Doctor's Best brings over 30 years of science-based nutrition and independent lab verification to ensure purity and reliability.
• Daily 1,000 mg servings support antioxidant protection and connective tissue health, helping protect joints, skin and blood vessels while you move through everyday life with energy and resilience.

Quali-C is manufactured in Scotland using pharmaceutical grade production, giving this vitamin C supplement a purity and reliability that tablets can't always match. The powder is completely free from fillers and is independently verified for purity and potency. Doctor's Best has grown on science-based nutrition for over 30 years, and the Quali-C trademark signals pharmaceutical grade sourcing through DSM. If you also use a vitamin D supplement, this powder blends seamlessly into your daily routine.

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Mix 1 level scoop (1 gram) in 240 ml of fruit juice or beverage of your choice, twice daily, preferably without food, or as recommended by a nutritionally informed physician. Store in a cool, dry place. This supplement should not be used as a substitute for a balanced diet. Keep out of reach of small children. Consult your doctor before starting any exercise or nutritional supplement programme, especially if you are pregnant or have a serious medical condition.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Vitamin C (Ascorbic Acid)

Vitamin C, or ascorbic acid, is a water-soluble micronutrient crucial for healthy connective tissue and immune function.

This formulation uses Quali-C ascorbic acid manufactured in Scotland, giving pharma-grade purity with no fillers or extras.

What Does Vitamin C Do?

Vitamin C helps support immune function and provides antioxidant protection in line with EFSA guidelines, contributing to the normal functioning of the body's defence systems.

It also acts as a cofactor in collagen synthesis, supporting connective tissue integrity in skin, joints, and blood vessels, and it aids iron absorption, with roles recognised in general nutritional guidance.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Vitamin C Quali-C ascorbic acid: 1000 mg

Doctor's Best is our preferred brand for this Vitamin C powder because the manufacturer brings a long-standing track record in Science-Based Nutrition with more than 30 years of supplement experience and a broad portfolio of products. This heritage supports a consistent approach to quality and formulation that we recognise and trust for pure ingredients.

Quality is a defining trait of this brand. The Quali-C ascorbic acid used in this product is made in Scotland under pharmaceutical-grade production protocols and is independently tested for purity and potency, with certifications that align with our high standards. Doctor's Best also maintains rigorous quality control and transparency around ingredients, ensuring a pure, excipient-free powder that meets non-GMO, gluten-free, soy-free and vegan criteria, backed by third‑party verification.

We chose Doctor's Best over competitors because their packaging, certifications, and manufacturing philosophy line up with our commitment to safety and traceability. This brand was evaluated by our medical team for compliance with our quality assurance criteria, reinforcing our confidence in its suitability for this supplement. Given the product’s fit for flexible dosing and high purity, we are confident in recommending Doctor's Best as a dependable partner for Welzo customers.