Probiotics in Australia: CFU, Strains, Formats & How to Read the Label (2026 Guide)
What does 90 billion CFU mean? Why do strain names matter, and why did Lactobacillus get renamed? A plain-English guide to choosing and comparing probiotics in Australia.
Probiotic labels are packed with big numbers and long Latin names. This guide explains what those numbers and names actually mean, so you can compare probiotic supplements on a like-for-like basis.
What Are Probiotics?
Probiotics are live micro-organisms — mostly bacteria, and some yeasts — included in supplements and fermented foods. Fermented foods such as yoghurt, kefir, sauerkraut and kimchi naturally contain live cultures. Supplements provide specific strains in measured amounts.
What Does CFU Mean?
CFU stands for colony forming units — the standard measure of how many viable (live) micro-organisms are in a serving.
Check: per serving, not per tablet
A label stating "90 billion CFU" may refer to a serving of two tablets, not one. Read the serving size.
Check: at manufacture or at expiry?
Probiotics are live, so numbers can fall over time. Some labels state the CFU count "at time of manufacture"; others guarantee it "until expiry". The second is the more useful figure for comparison.
Is a higher CFU better?
Not automatically. CFU tells you quantity, not which strains are present or whether they suit you. Strain selection matters as much as the number.
How to Read a Probiotic Strain Name
A complete strain name has three parts:
| Part | Example | What it tells you |
|---|---|---|
| Genus | Lacticaseibacillus | The broad group |
| Species | rhamnosus | The specific type |
| Strain code | e.g. a letter/number code | The exact strain studied and manufactured |
Many supplements list genus and species only. Products that include strain codes give you more precise information about exactly what is inside.
Why some Lactobacillus names changed
In 2020, scientists reclassified the large Lactobacillus genus into 25 genera. You may now see newer names on labels — for example Lacticaseibacillus rhamnosus (formerly Lactobacillus rhamnosus), Limosilactobacillus reuteri and Lactiplantibacillus plantarum. Older names are still widely used. They refer to the same organisms.
Common groups you will see
- Lactobacillus and related genera — lactic acid bacteria found in fermented dairy and vegetables
- Bifidobacterium — bacteria that occur naturally in the human gut
- Streptococcus thermophilus — used widely in yoghurt and cheese making
- Bacillus coagulans and Bacillus subtilis — spore-forming bacteria, often used in gummies and shelf-stable products because spores tolerate heat and storage
Single-Strain vs Multi-Strain
A single-strain product contains one organism. A multi-strain product combines several — some contain 10 or more. More strains is not automatically better; it simply means a broader mix. Compare the strains listed, not just the count.
Probiotic Formats Compared
| Format | What to check |
|---|---|
| Capsules / tablets | CFU per serving, strains, storage directions |
| Gummies | Usually spore-forming strains such as Bacillus coagulans; check sugar and other added ingredients |
| Combination formulas | Probiotics combined with enzymes, prebiotics, cranberry or vitamins — check every ingredient and amount |
Probiotics vs Prebiotics
Probiotics are live micro-organisms. Prebiotics are types of dietary fibre — such as inulin from chicory or Jerusalem artichoke, and acacia fibre — that gut bacteria use as food. Some products combine both.
Storage
Some probiotics need refrigeration; shelf-stable products and spore-forming strains generally do not. Always follow the storage directions on the label, and keep products away from heat and humidity.
Who Should Check With a Doctor First?
Probiotics are not suitable for everyone. Speak with your doctor before use if you:
- Are immunocompromised or seriously unwell
- Have recently had surgery or have a central line
- Are pregnant or breastfeeding
- Are taking medicines, including antibiotics or immunosuppressants
Probiotic Checklist
- CFU per serving — and whether it is guaranteed to expiry
- Strain names — genus, species and ideally strain code
- Serving size and servings per container
- Storage directions
- Other ingredients and allergens
- Cost per serving
Probiotics at Health & Heal
- Women's Probiotic 90 Billion CFU — 18 Strains, 90 Tablets — multi-strain tablets, 90 billion CFU per two-tablet serving.
- Holman Labs Women's Probiotic Gummies — Cranberry & Pineapple — a gummy combining Bacillus coagulans with cranberry, D-mannose and vitamin C.
- Digestive Enzymes 16-in-1 + Prebiotic & Probiotic — enzymes combined with inulin, acacia fibre and spore-forming probiotics.
Related reading: Capsules, Liquid Drops or Gummies: How to Choose a Supplement Format.
Frequently Asked Questions
What does "billion CFU" mean?
It is the number of live micro-organisms per serving, measured in colony forming units.
Is Lactobacillus the same as Lacticaseibacillus?
Some former Lactobacillus species were renamed in 2020. Lacticaseibacillus rhamnosus and Lactobacillus rhamnosus refer to the same species.
Do probiotic gummies work the same as capsules?
They usually contain different strains. Gummies commonly use spore-forming strains that tolerate manufacturing and storage. Compare the strains and CFU per serving.
Do I need to refrigerate my probiotic?
Only if the label says so. Follow the storage directions on your product.
This article is general educational information only and is not medical advice. Supplements are not intended to diagnose, treat, cure or prevent any disease. Always read the label and follow the directions for use. If symptoms persist, talk to your health professional.