Health•Wellness
You've Heard of Probiotics, But Have You Heard of Postbiotics?
4 May '26
4 min read
There's a piece of your immunity puzzle still missing. Meet the part of the conversation nobody's had with you yet.
For years, supporting gut health has meant one thing: good bacteria. Yoghurt, kombucha, and a daily probiotic capsule have all been associated with benefits like digestive comfort, immune support, and general wellbeing[1].
But the gut is doing something far more complex than most people realise. Your gut is your body’s first line of defence, actively involved in identifying potential threats, regulating immune responses, and helping your body stay prepared for whatever the day brings.[2] Around 70% of your immune system lives there,[2] which means your digestive system isn’t simply processing what you eat. It plays an active role in immune readiness. Your immune system isn’t working alongside your gut; it’s working through it.
Adding a postbiotic to an existing probiotic routine is the next logical step, and if you're ready to take it, Blackmores Gut Immune Biotic™ is where to start.
Probiotics, prebiotics, postbiotics: wait, what's the difference?
You’re probably already across probiotics, the live bacteria found in fermented foods and daily supplements that help maintain a healthy gut microbiome. Prebiotics are the dietary fibres that feed those bacteria, helping them flourish. Postbiotics are what comes next: the bioactive compounds those bacteria produce during fermentation, representing the active output of a well-functioning gut at work[1].
Think of it as a production line. Prebiotics are the raw material. Probiotics are the workers. Postbiotics are what they make. Each plays a role, and none of them replaces the other.
Postbiotics: the newer player in gut health
Unlike live probiotic bacteria, postbiotics don’t need to survive the journey through your digestive system to do their job. They can be delivered more precisely, working directly to help support the gastrointestinal immune function and assist in regulating the body’s immune response[3].
Cold and flu season is the obvious pressure point, but the immune system is working year-round.
Periods of stress, disrupted sleep, long work weeks, and even intense exercise all place real demand on the gut-immune connection. Supporting it consistently, not just when you feel something coming on, is what makes the difference between reacting and staying prepared.
Inside the formula
Blackmores Gut Immune Biotic™ is formulated around the gut-immune connection, bringing together three targeted ingredients in a triple-action supplement, to help enhance immunity*.
Where most immune supplements target one pathway, Blackmores Gut Immune Biotic™ works across three. Vitamin C and zinc gluconate cover the nutritional foundations most immune formulas are built on, while Wellmune® brings the postbiotic layer, supporting the gut-immune connection at the level most routines currently miss.
High-Strength Vitamin C is one of the most well-established nutrients for immune support. It contributes to the normal function of immune cells, helps the body respond to everyday challenges, and acts as an antioxidant to help reduce free radicals formed in the body[4].
Because vitamin C is water-soluble, the body doesn't store it the way it does fat-soluble vitamins - excess is flushed out, which means daily intake matters[5]. Most people know they need it; fewer are getting enough of it consistently throughout the year.
Zinc Gluconate is a highly bioavailable form of zinc, a mineral that plays an important role in the normal function of the immune system[6]. Zinc intake can be lower in people following plant-based diets, as zinc from plant sources is less readily absorbed than from animal sources due to the presence of phytates[7]. Together with vitamin C, it helps reinforce the body's everyday defences.
At the heart of the formula is Wellmune®, a postbiotic derived from a specific strain of baker's yeast and backed by over a dozen clinical studies involving adults, children, and people managing high-stress lifestyles and active training schedules[8]. Rather than introducing live bacteria, Wellmune® is clinically studied for its ability to support innate immune cells, helping them stay ready to respond when it matters[9].
Activate your immunity today
Your gut and immune system are already connected. Blackmores Gut Immune Biotic™ is formulated to make sure that connection is working as effectively as possible. Shop Blackmores online or in-store at Chemist Warehouse.
References & Disclaimers
1. Frontiers in Nutrition. Unveiling the therapeutic symphony of probiotics, prebiotics, and postbiotics in gut-immune harmony.
2. Wiertsema SP et al. The interplay between the gut microbiome and the immune system. Nutrients.
3. Nutrients, Postbiotics in Human Health.
4. Nutrients, Vitamin C and immune function.
5. Harvard T.H. Chan School of Public Health, Vitamin C, the nutrition source.
6. Archives of Biochemistry and Biophysics, Zinc and immunity: an essential interrelation.
7. European Journal of Clinical Nutrition, Effect of vegetarian diets on zinc status.
8. Kerry Supplements, Wellmune® research studies.
9. Nutrition, Yeast-derived beta,
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*After exercise
Article content disclaimer: Always read the label and follow the directions for use. Sponsored content in partnership with Blackmores.
