Natural C gives high potency vitamin C to help support immune resilience, and you’re picking a brand built on 1955 heritage, GMP quality, and evidence-based nutrition. Its 1000mg vitamin C with a citrus bioflavonoid complex and rose hips provides antioxidant support. Douglas Laboratories' long standing commitment to purity and quality, backed by GMP and ISO standards, makes it a trustworthy choice for vitamin d supplement routines.

Available Sizes & Variants:

100 tablets - convenient daily dose for immune support.

Benefits & Features:

• Supports immune resilience with potent vitamin C.
• Includes a citrus bioflavonoid complex that supports antioxidant synergy with vitamin C.
• Daily 1000mg aligns with evidence-based immunity support and oxidative protection for adults.
• Douglas Laboratories' GMP-certified facilities ensure purity, potency, and accurate labeling, while rigorous batch testing and transparent quality controls give you confidence in every tablet daily.
• Gluten-free, non-GMO formula with no artificial colours or preservatives, ensuring vitamin c vitamins are clean and accessible.

Douglas Laboratories has a long heritage dating back to 1955, built on scientific rigour with family ownership and GMP-certified manufacturing that keeps purity and potency front and centre. Natural C 1000mg pairs 1000mg of vitamin C with a citrus bioflavonoid complex and rose hips for antioxidant synergy. Dr Harri Hemilä of the University of Helsinki notes that daily vitamin C supports immune resilience, aligning with the product's evidence-based approach and the brand's commitment to transparent quality.

Vitamin, fillers (microcrystalline cellulose, carboxymethyl cellulose), gloss agent (hydroxypropylmethyl cellulose, glycerin), citrus bioflavonoid complex, rose-hip powder, anti-caking agents (stearic acid, silicon dioxide, magnesium stearate).

• GTIN: 310539019092
• Manufacturer: Douglas Labs
• Categories: Douglas Labs SupplementsNew Arrivals
• Best buy: 6 - 24 months+

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.

Take one tablet daily or follow your doctor's instructions. Take 1/2 level teaspoon daily.

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

The Active Ingredient Is: Vitamin C (Ascorbic Acid)

Vitamin C, also known as ascorbic acid, is a water-soluble vitamin essential for everyday functions including collagen building and antioxidant protection.

This formula provides Vitamin C with a citrus bioflavonoid complex and rose hips to support antioxidant synergy, alongside other ingredients that aid product quality and consistency.

What Does Vitamin C Do?

Vitamin C participates in regular collagen synthesis and helps keep antioxidant defences, supporting overall body function in line with EFSA and NHS guidance. Scientific studies suggest a role in supporting immune function and antioxidant status.

Dr. Hemilä of University of Helsinki found that vitamin C supplementation relates to improvements in immune resilience and antioxidant capacity in adults, reinforcing its role in daily health support.

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

Welzo teams up with brands that blend scientific rigour with real-world trust, and Douglas Laboratories fits this exactly. This brand is recognised for a long-standing scientific approach to nutritional supplements, grounded in decades of research since its 1955 founding and reinforced by strong practitioner endorsement. The manufacturer’s reputation for quality, openness and customer service underpins our confidence in their products.

Douglas Laboratories upholds stringent quality management and laboratory proficiency, operating in sites that meet ISO 9001 and ISO 17025 standards and possessing GMP certification. Their dedication to purity and potency is reflected in routine label accuracy and contaminant testing, aligning with our our supplement quality standards and ensuring consistency across batches.

For this product, the brand's formulation—high-dose vitamin C with a citrus bioflavonoid complex and rose hips, in a gluten-free and non-GMO formula—fits naturally with our wellness emphasis while staying faithful to the evidence available. This combination showcases Douglas Laboratories’ product specificity and manufacturing excellence, validated by our our medical team during evaluation.