Immu-Stay boosts your immune defences, helping you fend off seasonal bugs, thanks to a strong mix of natural ingredients from New Zealand. This collection of key actives includes Vitamin C, Beta 1,3 Glucan and Olive Leaf Extract. It's manufactured in GMP-certified New Zealand facilities by XtendLife, recognised for premium natural supplements. Ingredient selection is supported by clinical data.

Available Sizes & Variants:

90 tabs - simple daily routine for ongoing immunity support.

Benefits & Features:

• Supports immune cell function with zinc, selenium and vitamin C for antioxidant defence.
• Beta 1,3 Glucan helps stimulate white blood cells to boost natural defences.
• Olive Leaf and Bilberry extracts deliver polyphenols to support immune health.
• Piperine improves how the body uses plant actives, helping support absorption and effectiveness of the formula during daily activities, which can maximise immunity support across busy days.
• Daily use helps keep immunity lasting.

XtendLife is a New Zealand brand recognised for premium natural supplements and careful ingredient selection. Immu-Stay blends more than twenty actives including Beta 1,3 Glucan, Olive Leaf and Bilberry extracts, Turmeric, Zinc and Selenium, produced in GMP-certified facilities. The brand emphasises bioavailability and safety, with selections grounded in clinical data. Its strong traveller following shows practical immune support and trusted quality. For a holistic routine, many people pair natural supplements with probiotics for gut health.

Vitamin C (from 100 mg of Calcium Ascorbate & 130 mg of Magnesium Ascorbate), Calcium (from 71 mg of Dicalcium Phosphate & 100 mg of Calcium Ascorbate), Magnesium (from 130 mg of Magnesium Ascorbate & 51 mg of Magnesium Stearate), Zinc (from 30 mg of Zinc Citrate), Copper (from 3 mg of Copper Gluconate), Manganese (from 10 mg of Manganese Citrate), Andrographis (from Andrographis paniculata Leaf) (providing 80 mg of Andrographolide), Olive Leaf Extract (from Olea europaea Leaf) (providing 112.5 mg of Oleuropein), Eleuthero Extract (from Eleutherococcus senticosus Root) (providing 3.2 mg of Eleutherosides B + E), Turmeric Extract (from Curcuma longa Root) (providing 332.5 mg of Curcuminoids), Quercetin (from Japanese Sophora Flower), Bilberry Extract (from Vaccinium myrtillus Fruit) providing 62.5 mg of Anthocyanins & Proanthocyanins), Milk Thistle Extract (from Silybum marianum Seed) (providing 200 mg of Silymarins), DIM (3,3-Diindolylmethane), Green Tea Extract (from Camellia sinensis Leaf) (providing 160 mg of Catechins), Beta Glucan (from Yeast), Bromelain (from Pineapple Stem), Nigella (Black Cumin) Extract (from Nigella sativa Seed) (equivalent to 380 mg of Black Cumin Seed), L-Cysteine, N-Acetyl L-Cysteine, Piperine. Microcrystalline cellulose, Dextrose, Pharmaceutical glaze (Talc, Polyvinyl alcohol, Polyethylene glycol and Polysorbate 80), Silicon dioxide, Sodium carboxymethyl cellulose, Maltodextrin.

• GTIN: NULL
• Manufacturer: Xtendlife
• Categories: New ArrivalsXtend SupplementsXtendlife
• 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 3-6 tablets daily. For best results, divide the dose into two parts: one in the morning and another in the afternoon or evening, with or after meals. Use 6 tablets daily if taking Immu-Stay alone, or 3 tablets daily if combined with a full dose of the Total Balance nutrient system.

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

The Active Ingredient is: Vitamin C (Calcium & Magnesium Ascorbate)

Vitamin C is a water-soluble vitamin that’s kinda essential for day-to-day bodily functions including immune support and antioxidant protection.

This form, Calcium & Magnesium Ascorbate, teams up ascorbate with minerals to help bioavailability and stability.

What Does Vitamin C Do?

Vitamin C is involved in immune cell function and helps protect cells from oxidative stress, which lines up with EFSA and NHS guidance on normal immune health.

Dr. Hemilä of the University of Helsinki found that vitamin C is recognised to help shorten symptom duration and severity in viral upper respiratory tract infections.

This product isn’t intended to diagnose, treat, cure, or prevent any disease.

XtendLife fits Welzo's partner criteria with a science-led, quality-first approach and a proven manufacturing backbone. This brand is recognised for producing premium supplements in GMP-certified facilities in New Zealand, underscoring a strong commitment to consistent quality and safety. XtendLife emphasises natural ingredient selection supported by clinical data, reflecting a heritage of meticulous formulation that resonates with Welzo's standards and expectations. This brand stands out in our evaluation for its clear adherence to rigorous quality practices and its ability to translate complex science into a trusted immune-support blend, which we pair with our our supplement quality standards. Our medical team has vetted XtendLife to ensure alignment with Welzo's care principles, and the partnership highlights a shared focus on transparency, reliability and customer safety, as seen in their manufacturing philosophy and certifications. For customers, this means a consistently crafted product backed by a brand with a credible track record, chosen through Welzo's rigorous team evaluation and supplier criteria, as described by Welzo's healthcare professionals.