Gut & Immune (ImmuniGut®)

At a Glance

ImmuniGut® is the Gut and Immune pillar inside BioNAD Longevity+®, The Fittest Pet®’s vet-formulated all-in-one daily tasty chew built around six wellness pillars for whole-body healthy ageing, formulated in Australia. It supports microbiome balance, digestive comfort and stool quality, plus gut barrier health and everyday immune resilience, making it ideal for dogs prone to sensitive stomachs, bloating, gas, irregular stools or digestive ups and downs, while reducing the need for separate probiotic powders, prebiotic supplements and immune chews.

Gut Health & Immune Support for Dogs

Digestive balance, stool quality and immune resilience in one daily chew.

ImmuniGut® is the Gut & Immune pillar inside BioNAD Longevity+®, our all-in-one daily chew built around six wellness pillars for whole-body healthy ageing.

Designed for dogs who need help maintaining a healthier gut environment, smoother digestion and stronger everyday immune resilience, especially if they are prone to sensitive stomachs, irregular stools, bloating, digestive upset or frequent stress on the gut.

Targeted Gut & Immune Support

✅ Gut Microbiome Balance
 Nourishes a healthier gut environment, helping support the beneficial microbes linked with digestion, stool quality and overall wellbeing.

✅ Digestive Comfort
 Helps maintain smoother digestion for dogs prone to occasional bloating, gas, tummy sensitivity or digestive imbalance.

✅ Stool Quality & Regularity
 Supports healthier stool consistency and everyday bowel balance, helping paw parents notice fewer digestive ups and downs.

✅ Gut Barrier Health
 Helps care for the intestinal barrier, one of the body’s important first lines of defence.

✅ Immune Resilience
 Nourishes everyday immune function, helping dogs stay better supported through normal daily exposures and seasonal changes.

✅ Postbiotic Fibre Support
Feeds beneficial gut bacteria, helping create the conditions for a more balanced digestive ecosystem.

✅ Whole-Body Wellbeing
 Supports a gut foundation that can influence digestion, immunity, skin comfort, mood and healthy ageing more broadly.

✅ A Simpler Daily Routine
 Builds Gut & Immune care into one complete daily chew, reducing the need for separate probiotic powders, gut supplements or immune chews.

One chew. Six pillars. Complete daily care for the dog who deserves more than the basics.

Ingredient Blend

Inside the ImmuniGut® Blend

ImmuniGut® combines heat-killed Lactobacillus plantarum postbiotic, inulin, fructo-oligosaccharides and β-glucans to support digestive balance, stool quality, gut barrier health and everyday immune resilience from the inside out.

Heat-Killed Lactobacillus plantarum Postbiotic

Gut barrier & stool quality support

Functional benefits:

  • Supports gut barrier health, helping care for one of the body’s key protective surfaces
  • Helps maintain healthier stool quality and digestive balance in everyday life
  • Offers a stable postbiotic approach that is designed to remain functional through processing and storage
  • Adds targeted gut support for paw parents who want more than a basic “probiotic” claim

Inulin

Prebiotic fibre & microbiome nourishment

Functional benefits:

  • Feeds beneficial gut bacteria, helping nourish a healthier digestive environment
  • Supports bowel regularity and stool consistency as part of daily gut care
  • Contributes to the production of beneficial fermentation by-products that support gut wellbeing
  • Helps create a stronger foundation for dogs with sensitive digestion or inconsistent stools

Fructo-Oligosaccharides

Digestive balance & beneficial bacteria

Functional benefits:

  • Act as prebiotic fibres that help beneficial bacteria thrive within the gut
  • Support digestive balance and a healthier microbial environment
  • Help care for stool quality and everyday intestinal wellbeing
  • Complement inulin to provide broader prebiotic nourishment for the microbiome

β-Glucans

Immune resilience & gut-immune support

Functional benefits:

  • Support normal immune function, helping dogs stay better supported through everyday challenges
  • Help connect gut health with immune resilience, since much of the immune system is closely linked with the gut
  • Contribute to a more complete Gut & Immune blend beyond digestion alone
  • Add valuable daily support for paw parents thinking proactively about whole-body wellbeing

The All-in-One Advantage

One daily chew. Six connected pillars of comprehensive support.

ImmuniGut® is the Gut & Immune pillar inside BioNAD Longevity+®, our veterinarian-developed daily functional chew designed to support whole-body healthy ageing through six targeted wellness pillars.

Instead of piecing together your dog’s routine from separate products such as:

  • probiotic or gut powders
  • prebiotic supplements
  • immune chews
  • hip & joint powders
  • fish oils for skin & coat
  • senior brain supplements
  • vitality formulas

BioNAD Longevity+® brings Brain & Calm, Joint & Mobility, Energy & Vitality, Gut & Immune, Skin & Coat, and Advanced Antioxidants together in one simple daily chew your dog can enjoy like a treat.

Six pillars. One chew. Less supplement stacking, less guesswork, more complete daily support.

Beyond Gut & Immune: A Complete Healthy Ageing Ritual

Other Brands
BioNAD Longevity+® with ImmuniGut®

Built around one main concern

Supports Gut & Immune health as part of a comprehensive six-pillar healthy ageing system

Helps with the digestive issue you noticed first

Cares for the gut concern on your mind now, while also supporting the wider systems your dog will rely on for years to come

Leaves you buying separate products for joints, brain health, skin, coat, energy and ageing support

Includes Brain & Calm, Joint & Mobility, Energy & Vitality, Gut & Immune, Skin & Coat and Advanced Antioxidants in one functional chew

Adds another powder, capsule or chew to juggle and manage

Replaces supplement stacking with one simple daily ritual. Convenient, simple and zero fuss

Can mean mixing powders into food or managing multiple tubs and routines

Designed as a soft chew your dog can enjoy like a delicious daily treat

Focuses on gut health and digestion in isolation

Connects gut health with immune resilience, skin health, brain wellbeing, energy and healthy ageing, for optimal holistic function.

Can feel like a short-term add-on when tummy issues flare

Built as a vet-formulated daily wellness foundation for whole-body, lifelong healthy ageing

Solves only part of the routine

Provides broader daily care while helping you save time, money and hassle

How Gut Health & Immune Function Connect to Whole-Body Health

Gut health and immune function do not exist in isolation.

A dog’s digestive balance can influence far more than stool quality alone. The gut plays an important role in nutrient absorption, immune resilience, skin health, inflammation balance, energy and overall wellbeing.

That is why ImmuniGut® sits inside the wider BioNAD Longevity+® 6 Pillar Protocol:

BioNAD Longevity+® brings Brain & Calm, Joint & Mobility, Energy & Vitality, Gut & Immune, Skin & Coat, and Advanced Antioxidants together in one simple daily chew your dog can enjoy like a treat.

Six pillars. One chew. Less supplement stacking, less guesswork, more complete daily support.

Support the gut foundation behind better daily wellbeing.

ImmuniGut® is the Gut & Immune pillar inside BioNAD Longevity+®, helping care for microbiome balance, digestive comfort, stool quality and immune resilience as part of a complete 6-pillar healthy ageing routine.

One daily chew. Six targeted pillars for healthy ageing: Brain & Calm, Joint & Mobility, Energy & Vitality, Gut & Immune, Skin & Coat, Advanced Antioxidants.

Whole-body healthy ageing support, without the stress or cupboard clutter.

Shop BioNAD Longevity+®

FAQs

A strong daily gut-health routine starts with high-quality nutrition, consistency, hydration and targeted nutritional support that helps care for the microbiome, stool quality and digestive balance.

ImmuniGut® is the Gut & Immune pillar inside BioNAD Longevity+®, combining a heat-killed L. plantarum postbiotic, inulin, fructo-oligosaccharides and β-glucans to support gut balance, digestive wellbeing and everyday immune resilience.

The best daily gut and immune supplement for dogs should do more than add one generic digestive ingredient. A strong formula should support microbiome balance, stool quality, gut barrier health, digestive comfort and normal immune function.

ImmuniGut™ brings together postbiotic, prebiotic and immune-support ingredients inside BioNAD Longevity+™, where it works alongside five additional pillars for whole-body healthy ageing.

For occasional digestive sensitivity, helpful daily care can include consistent feeding, appropriate fibre and ingredients that support a healthier gut environment and smoother digestion.

ImmuniGut™ is designed to support microbiome balance, stool quality and digestive comfort through a combination of postbiotic and prebiotic ingredients. If your dog has a swollen abdomen, repeated unproductive retching, severe pain, ongoing vomiting, marked bloating or sudden distress, seek veterinary care urgently, as those signs can be serious.

Targeted nutritional support can help care for stool quality and bowel regularity, especially when it includes prebiotic fibres that nourish beneficial gut bacteria.

Inulin and fructo-oligosaccharides help support a healthier gut environment, while the postbiotic in ImmuniGut™ adds another layer of daily digestive care. Persistent constipation, straining, painful defecation or major stool changes should be assessed by a veterinarian.

Helpful ingredients for dog gut health can include postbiotics, prebiotic fibres such as inulin and fructo-oligosaccharides, and immune-support nutrients such as β-glucans.

These ingredients support different parts of digestive wellbeing, from microbiome nourishment and stool quality to gut barrier function and immune resilience. ImmuniGut™ combines all four inside one targeted Gut & Immune blend.

Give BioNAD Longevity+® daily based on your dog’s weight:

  • <10 kg: 1 chew per day
  • 11–25 kg: 2 chews per day
  • >25 kg: 3 chews per day

You can give the full daily amount at once, or split it across morning and evening if that suits your routine. Consult your veterinarian first if your dog is under 12 weeks old, pregnant, lactating, or has medical conditions.

Probiotics are live beneficial bacteria. They can help, but they’re also the most fragile, meaning their effectiveness can depend on storage, heat, moisture, shelf life, and whether enough survive through processing and the gut.

Prebiotics are fibres that act like “food” for beneficial gut microbes, helping support a healthier microbiome environment over time.

Postbiotics are non-live beneficial microbial compounds or cells that can still deliver functional benefits without relying on live bacteria staying alive, which makes them a more stable, consistent, everyday option for many dogs.

That’s why ImmuniGut® uses a heat-killed L. plantarum postbiotic together with prebiotic fibres and β-glucans, supporting digestive balance and the gut–immune connection in a format designed for reliability and daily consistency, not “hope the bacteria survived”.

Yes. A big part of your dog’s immune defence is trained and regulated in the gut, which is why digestion and immunity tend to rise and fall together. When the gut environment is out of balance, paw parents often notice more “little issues” like inconsistent stools, tummy sensitivity, seasonal flare-ups, and slower bounce-back. That’s why a smarter daily routine supports both: microbiome balance + gut barrier integrity + immune resilience. ImmuniGut® combines a heat-killed L. plantarum postbiotic, prebiotic fibres, and β-glucans to support the gut–immune connection in a stable, daily format, not just digestion alone.

If your dog seems to pick up every bug, the goal is to strengthen the foundations that support normal immune function: sleep quality, stress levels, gut balance, and nutrient absorption. Many paw parents overlook that immunity isn’t only “immune boosters”, it’s built through the gut every day. Daily gut support can help maintain a healthier internal environment and more consistent resilience through seasonal changes. ImmuniGut supports this with a postbiotic + prebiotic + β-glucan approach inside BioNAD Longevity+®, so you’re supporting immune resilience through the gut, in one simple routine, instead of juggling separate probiotic powders and immune chews.

Not necessarily. Many dog supplements are built around one main concern, such as gut health, immunity, joint support, brain health, skin and coat or senior wellbeing. That can leave paw parents juggling multiple powders, oils, capsules and chews.

BioNAD Longevity+™ brings Brain & Calm, Joint & Mobility, Energy & Vitality, Gut & Immune, Skin & Coat, and Advanced Antioxidants together in one veterinarian-developed daily chew, helping simplify your dog’s routine while supporting broader daily wellbeing.

A proactive gut-health routine can include quality nutrition, adequate hydration, appropriate fibre and ingredients such as postbiotics, inulin, fructo-oligosaccharides and β-glucans to support digestion, stool quality, microbiome balance and immune resilience.

ImmuniGut™ gives dogs targeted Gut & Immune care inside BioNAD Longevity+™, alongside five additional pillars for whole-body healthy ageing. BioNAD Longevity+™ is a formulated supplementary food, not a treatment for digestive disease or immune disorders. If your dog has persistent vomiting, diarrhoea, constipation, abdominal pain, repeated infections or significant digestive changes, speak with your veterinarian. Digestive signs such as diarrhoea, constipation, vomiting, abdominal pain and bloating can have many causes and warrant veterinary review when persistent or severe.