PureDefense immune support helps bolster your immune system, thanks to a targeted blend with NAC, EpiCor, vitamin D and elderberry, and supported by Pure Encapsulations' strict quality standards. This blend keeps the facts intact while sounding a touch more like how customers chat about it in real life.

Available Sizes & Variants:

30 capsules – Daily immune support formula for ongoing use

Benefits & Features:

• Immune system booster supports day-to-day resilience.
• NAC provides antioxidant support and respiratory protection, helping lungs stay comfortable.
• Vitamin D helps support immune cell activation and normal response.
• EpiCor and elderberry work together to defend the respiratory tract through immune modulation and antiviral effects, helping you feel steadier during sniffly seasons and daily routine use.
• Quercetin complements the blend with flavonoids that support daily wellness and immune balance.

Pure Encapsulations has built a reputation for transparent labeling and hypoallergenic formulations, manufactured in GMP-certified facilities with rigorous third-party testing. PureDefense blends NAC with EpiCor yeast fermentate, elderberry and quercetin, plus vitamins C and D and zinc to support immune health and upper respiratory resilience. The star ingredients are NAC for antioxidant protection and EpiCor for immune activation, while elderberry and quercetin add flavonoid protection. This thoughtful mix reflects the brand's commitment to quality and practical everyday immune support, helping you stay steady through seasonal challenges.

N-acetyl-l-cysteine, ascorbic acid, EpiCor® dried yeast fermentate complex (from Saccharomyces cerevisiae), Elderberry extract, quercetin, zinc citrate, ascorbyl palmitate (antioxidant), cholecalciferol. Vegetarian capsule (hydroxypropyl methyl cellulose).

• GTIN: 766298023588
• Manufacturer: Pure Encapsulations
• Categories: Best SellersImmune System Vitamins & SupplementsNew ArrivalsPopular Supplement BrandsPure EncapsulationsSubscribe & Save Products
• 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.

The supplement should be taken as a food supplement, following the recommended dosage of 2 capsules twice a day with meals, or as advised by a healthcare professional.

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

1. PureDefense is a highly effective immune support supplement that contains a unique blend of vitamins, minerals, and herbal extracts to help boost your body's natural defenses against illness and disease.
2. This powerful formula contains key ingredients such as vitamin C, zinc, and elderberry extract, all of which have been clinically proven to enhance immune function and promote overall wellness.

The Active Ingredient Is: N-Acetyl-L-Cysteine (NAC)

N-Acetyl-L-Cysteine, commonly known as NAC, is a nutrient-derived amino acid metabolite used as a supplement ingredient and antioxidant support. This form is valued for its role in cellular protection and respiratory wellbeing through antioxidant mechanisms.

NAC provides antioxidant support by boosting glutathione and protecting lung tissue, with research describing its use for respiratory comfort and innate defence. This formula also includes other ingredients to support immune health.

What Does NAC Do?

NAC helps maintain normal antioxidant defences by supporting glutathione production and plays a role in protecting cells from oxidative stress, a function recognised in EFSA-aligned discussions on antioxidant nutrients. It also contributes to immune resilience as part of a broad immune-supporting blend.

Dr. De Flora from the University of Genoa found that daily NAC cut the frequency and severity of influenza-like episodes, supporting respiratory comfort and immune resilience.

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

Why Pure Encapsulations PureDefense Immune Support is Welzo Selected

Pure Encapsulations kicks off with a heritage of purity and transparency in the supplement scene. The brand is renowned for hypoallergenic ingredients and clearly labelled formulations, underscored by GMP-certified facilities and rigorous quality controls. This strong reputation and commitment to clean sourcing form the backbone of our decision to partner with Pure Encapsulations as a trusted supplier for Welzo.

Their product development focuses on high-purity ingredients and independent testing for purity and potency, with frequent third‑party checks that align with our quality standards. This brand’s meticulous manufacturing philosophy ensures consistent quality across batches, aligning with our expectations for reliability in immune-support formulations such as PureDefense. Our evaluation process emphasises their proven manufacturing excellence and emphasis on safety and consistency, which is why this brand stands out in a competitive field. For ongoing assurance, this brand was evaluated by our team of medical experts against our quality certification process.

Ultimately, Pure Encapsulations is a natural fit for this immune-support supplement due to its established track record of purity, robust testing, and transparent practices, reinforcing why we trust them as our supplement partner.