NOW Foods Pets Immune Support is a vet-designed immune support supplement for dogs and cats, powered by a natural mushroom blend that boosts immune health and resistance to pathogens. Formulated by Dr Barbara Royal, DVM, CVA, it carries trusted veterinary expertise. NOW Foods manufactures to cGMP and NASC quality standards for peace of mind.

Available Sizes & Variants:

90 chewable tablets - convenient daily dose for dogs and cats to support immune health.

Benefits & Features:

• Designed for daily use.
• Mushroom blend supports innate and adaptive immunity.
• Milk thistle and turmeric support liver health.
• Dosing adjusts by weight for safety and efficacy.
• By combining bitter botanicals and antioxidants, the formula helps support immune responsiveness while maintaining overall wellness, which can help your pet stay active and thrive.

NOW Foods Pets Immune Support blends a potent Organic Mushroom Blend (125 mg per tablet) with botanicals vets rely on to support immune health and organ comfort. The star mushroom mix includes Turkey Tail, Maitake, and Reishi, backed by Milk Thistle and Turmeric for liver support and anti inflammatory balance, plus Ashwagandha for stress resilience. The product is veterinarian formulated by Dr Barbara Royal, DVM, CVA and carries the NASC quality seal, reflecting NOW Foods' commitment to safety and transparency. Great alongside canine probiotics, joint supplements for dogs, and calming treats for dogs.

Milk Thistle Extract, Turmeric root extract, Burdock Root, Licorice Root, Red Clover, Ashwagandha root extract, Selenium (from Selenium Amino Acid Complex), Milk Thistle Extract, Turmeric root extract, Burdock Root, Licorice Root, Red Clover, Ashwagandha root extract, Selenium (from Selenium Amino Acid Complex)

• GTIN: 733739043511
• Manufacturer: NOW Foods
• Categories: Cat Products, Care & TreatsImmunity SupplementsNOW FoodsPet Omegas & Fish Oil SupplementsPet SupplementsSupports & Braces
• 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.

Administer the chewable tablets as directed based on your pet's weight: for pets up to 20 lbs, give 1 tablet twice daily; for pets 21 to 40 lbs, give 2 tablets twice daily; for pets 41 to 80 lbs, give 3 tablets twice daily; for pets over 81 lbs, give 4 tablets twice daily. Store in a cool, dry place. Warnings: Safe use in pregnant animals or animals intended for breeding has not been proven. Use with caution in animals on steroids. Long-term use may cause or contribute to water retention, hypertension, and other cortisone-like side effects. If your pet's condition worsens or does not improve, stop product administration and consult your veterinarian. For animal use only. Keep out of the reach of children and animals. In case of accidental overdose, contact a health professional immediately.

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: Mushroom Blend (Organic)

The active ingredient is a mix of organic medicinal mushrooms chosen to boost immune system health in pets. This combination provides a rich source of bioactive compounds from several mushroom species, contributing to a natural immune-supportive profile.

Form and source information show the blend is organic and made for pet use. This formula also includes other botanical ingredients and trace nutrients that help complement the immune-supporting role of the mushroom mix.

What Does Mushroom Blend Do?

Beta-glucans from medicinal mushrooms help tune both innate and adaptive immune responses, boosting the body's defence against pathogens. The blend also contains selenium, which plays a part in immune cell function as an antioxidant.

In line with EFSA and NHS-inspired thinking, these ingredients contribute to normal immune system performance and protect cells from oxidative stress, supporting overall health in pets.

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

NOW Foods is Welzo's trusted partner for Pets Immune Support because the brand blends veterinary-informed formulation with a sturdy, regulated manufacturing context. The manufacturer is recognised for cGMP compliance and third‑party testing, and the NASC Quality Seal underscores ongoing industry oversight and facility audits for pet products. This strong regulatory and quality background helped our medical team identify a supplier with proven commitment to safety and transparency. Welzo's evaluation team, including Welzo's healthcare professionals, assessed NOW Foods against peers using our criteria for credibility, testing rigour, and certification, and confirmed their long‑standing reputation in the sector with clear quality controls our rigorous testing protocols.

Why this brand fits this supplement: NOW Foods Pets Immune Support is veterinarian‑informed by Dr Barbara Royal, DVM, CVA, and relies on a mushroom blend alongside liver and kidney support ingredients, aligning with Welzo’s focus on product science, safety, and suitability for pet immunity support. This combination of heritage, comprehensive quality practices, and product design differentiated NOW Foods in our selection process.