Life Extension Vitamin C and Bio-Quercetin Phytosome is a high potency vitamin C and quercetin supplement that supports immune health and reduces oxidative stress for everyday resilience. Life Extension has long been known for rigorous quality standards and transparent ingredient sourcing. This combination supports daily wellness and is produced by Life Extension, a brand known for strictly tested formulas and clear ingredient labels. Quality you can rely on.

Benefits & Features:

• High potency immune support comes from a vitamin c supplement that delivers strong antioxidant protection.
• Quercetin boosts immune support.
• Quercetin phytosome technology dramatically improves absorption, helping the body utilise more of the active ingredient.
• Non-GMO and gluten-free, the capsules suit a wide range of diets.
• Together, vitamin C and quercetin create a synergistic shield against oxidative stress, supporting daily resilience and long term immune function through improved antioxidant status overall.

This vitamin c supplement and quercetin formula uses Bio-Quercetin Phytosome, a delivery system that dramatically boosts absorption by binding quercetin to plant phospholipids. The quercetin comes from Sophora japonica fruit extract and sunflower phospholipids, and Life Extension routinely shares ingredient origins on labels, giving you confidence in what you’re taking. Transparent sourcing matters. Quality you can trust.

Vitamin C (as Ascorbic Acid), Quercetin phytosome (providing 5 mg quercetin from Japanese sophora concentrate (flower bud), phosphatidylcholine complex from sunflower)

• GTIN: 737870222866
• Manufacturer: Life Extension
• Size: 60 tablets
• Categories: Back to School Supplements & EssentialsBest SellersGout Supplements & VitaminsHealth Supplements for Frequent TravelersImmune System Vitamins & SupplementsLung & Respiratory SupplementsPhyto Perfumes & FragrancesQuercetin SupplementsSubscribe & Save ProductsVitamin CVitamin C Skincare
• 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 (1) tablet daily with food, or as recommended by a healthcare practitioner. Store in a cool, dry place, out of reach of children. Do not exceed the recommended dose. Do not purchase if the outer seal is broken or damaged. Consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

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

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Vitamin C (L-ascorbic acid)

Vitamin C is a water-soluble vitamin that works as a handy antioxidant and helps collagen synthesis and iron absorption.

This form is ascorbic acid, a common, easily absorbed version of vitamin C used to support daily wellness and bodily function.

What Does Vitamin C Do?

Vitamin C takes part in antioxidant protection and helps keep immune function normal, with extra support for connective tissue health as part of everyday body activity.

Dr. Carr from the University of Naples found that vitamin C supports immune health and lowers oxidative stress, aligning with EFSA guidance on nutrient function and everyday wellbeing.

Life Extension brings along a trusted heritage of rigorous quality standards and transparent ingredient sourcing to Welzo’s shelves. The brand is widely recognised in the supplement field for its commitment to quality manufacturing and clear product labeling, which supports our aim of clarity and trust for customers. This alignment with high standards is a core reason we chose Life Extension as our supplier for this immune-support formulation. Our team assessed Life Extension with Welzo's healthcare professionals to ensure alignment with our prescription-grade oversight and quality expectations, and we link this diligence to how we verify ingredient quality. For this product, Life Extension’s formulation approach uses a Bio-Quercetin Phytosome delivery system backed by published practice in absorption and bioavailability, complemented by high-dose vitamin C, making it a strong fit for this supplement type. This brand and product combination represents a thoughtful match to our evidence-informed selection process and quality criteria.

Welzo’s medical team review and our quality standards page underpin this choice, ensuring a transparent, safety-forward approach in every bottle. Welzo's healthcare professionals and how we verify ingredient quality are integral to our ongoing partnership.