Microbiome Winter Stack
A doctor-formulated, two-month protocol to rebuild your gut, repair your barrier, and protect your immune system through the cold months. Built from clinical-grade synbiotics, concentrated immunoglobulins, an oral probiotic, and propolis.
Why winter hits the same people every year.
Every May, the same pattern shows up in clinic. Women in their forties and fifties who have done everything right — eating well, walking most days, taking their vitamin C — and they're still catching the same cold their kids dragged home from school.
You're not unlucky. Around 70% of your immune system lives inside your gut. Every winter, three things happen at once: you eat less fibre, less fresh produce, and you spend more time indoors sharing air with everyone else's microbes. Your microbial diversity falls — and when microbial diversity falls, your immune defence falls with it.
Four layers of defence — from your mouth to your microbiome.
The Synbiotic Core
500 billion CFU per sachet
Thirteen-plus human-origin probiotic strains, prebiotic fibres (GOS and inulin), and postbiotic butyrate. Pharmaceutical-grade, shelf-stable.
Rebuilds microbial diversity — the single best predictor of immune resilience.
The Immunoglobulin Shield
1,200 mg serum-derived bovine immunoglobulin
Concentrated IgG, IgA, and IgM antibodies that bind pathogens directly inside your gut. Plus lactoferrin — antimicrobial, antiviral, supports the intestinal barrier.
Seals the gut wall and neutralises pathogens before they reach circulation.
The Oral Microbiome Layer
Clinically studied oral probiotic strain
Delivered as a lozenge for direct colonisation of the mouth and throat. Crowds out the bacteria associated with sore throats, sinus infections, and bad breath.
First-line defence at the point of entry. 8-Week Complete only.
The Propolis Defence
Standardised bee propolis extract
Concentrated bioflavonoids and CAPE — broad-spectrum antimicrobial activity backed by traditional use and modern clinical trials. Australasian-sourced.
Immediate-acting antimicrobial through the throat and respiratory tract. 8-Week Complete only.
Backed by the gut-immune axis.
Questions, answered.
Who is this protocol for?
Adults who catch repeated winter illnesses, feel run-down through the cold months, or want to support their gut and immune health proactively — particularly women aged 35 to 55 who have tried general supplements without seeing real results.
When should I start?
Ideally before the worst of winter arrives — March, April, or May in Australia. Two weeks of priming is when most people start to notice changes, so starting before the first colds circulate gives you a real head start.
What's the difference between the 4-Week and 8-Week packs?
The 4-Week Foundation contains the Synbiotic Core and Immunoglobulin Shield — enough to rebuild gut diversity and start repairing the barrier. The 8-Week Complete contains all four components, with the Synbiotic Core and Immunoglobulins for two months plus the Oral Probiotic and Propolis layers added in. The 8-Week is what Dr Froomes recommends in clinic.
Can I take this if I'm pregnant or breastfeeding?
Please consult your treating practitioner before starting. Some components may not be appropriate during pregnancy or breastfeeding.
Can I take it with prescription medications?
Always consult your treating doctor before starting any new supplement when on prescription medications, particularly immunosuppressants, antibiotics, or thyroid medication.
Are there any allergens I should know about?
The Immunoglobulin Shield is derived from bovine sources — avoid if you have a dairy allergy. The Propolis component is derived from bees — avoid if you have a bee allergy. Lactose intolerance is generally fine; the immunoglobulin product is very low in lactose.
Does anything need refrigeration?
No. The Synbiotic Core uses a patented stable delivery system that doesn't require refrigeration, which makes daily compliance much easier.
What's the refund policy?
30-day money-back guarantee on unopened components. We're confident you'll feel a difference within the first two weeks.
Important — general advice only. Information presented on this page is general health information and is not personal medical advice. Always consult your treating practitioner before starting any new supplement, particularly if you are pregnant, breastfeeding, immunocompromised, or taking prescription medications.
Products containing immunoglobulins are derived from bovine sources — avoid if you have a dairy allergy. Propolis is derived from bees — avoid if you have a bee allergy.
These products are listed complementary medicines and are not intended to diagnose, treat, cure, or prevent any disease. Dr Paul Froomes has no commercial interest or affiliation with any specific brand included in this protocol.