Probiotics are live microorganisms, usually beneficial bacteria or yeasts, that are used to support gut health and microbial balance. They may be found in supplements, fermented foods and some functional health products. The effect of a probiotic can depend on the strain, dose, formula and individual person.

Start by looking at the strain or strains used, the CFU amount, storage instructions, age suitability, and whether the product is designed for general gut support, antibiotic use, children, women’s health, travel, bloating or immune support. The best probiotic is not always the highest CFU product — it is the one that best matches your needs and tolerance.

CFU stands for colony forming units. It refers to the number of live microorganisms provided by the product. A higher CFU count does not automatically mean a better product, because the strain, formula quality, storage stability and intended use also matter.

Yes. Different probiotic strains may be used for different purposes. For example, some formulas are designed for general digestive support, while others may focus on antibiotic-associated digestive balance, women’s health, children’s gut support or immune support. Always check the product label and intended use.

Some people use probiotics during or after a course of antibiotics to support gut microbial balance. If taking antibiotics, ask your doctor or pharmacist whether a probiotic is suitable and how far apart to take it from your medication. Always follow the product label and professional advice.

Timing depends on the product. Some probiotics are taken with food, while others may be taken away from meals. Follow the directions on the label, as different probiotic strains and delivery systems may have different instructions.

Some probiotics require refrigeration, while others are shelf-stable. Always follow the storage instructions on the product label. If a probiotic says to refrigerate after opening or store below a certain temperature, those directions should be followed to help maintain product quality.

Shelf-stable probiotics can still be suitable when they are specifically formulated and tested for stability. The key is to follow the label directions, check the expiry date, avoid excess heat, and store the product as recommended by the manufacturer.

Some people may notice temporary digestive changes such as bloating, gas or changes in bowel habits when starting a probiotic. This can vary depending on the person and formula. If symptoms are severe, persistent or unusual, stop use and seek professional advice.

Some probiotics are specifically formulated for children, but not every probiotic is suitable for every age group. Use products that clearly state children’s suitability and follow the label directions. For infants, young children, premature babies or children with medical conditions, seek advice from a qualified health professional first.

Some probiotic products may be suitable during pregnancy or breastfeeding, but suitability depends on the strain, dose, formula and individual circumstances. Speak with your doctor, midwife, pharmacist or qualified health professional before use during pregnancy or breastfeeding.

People who are seriously unwell, immune-compromised, taking immune-suppressing medicines, pregnant, breastfeeding, caring for an infant, or managing a diagnosed medical condition should seek professional advice before using probiotics. Probiotics are generally well tolerated by many people, but they may not be suitable for everyone.

Use caution when combining probiotic products. Taking multiple probiotics may double up on strains, increase total CFU intake, or cause digestive discomfort in some people. If using more than one gut health product, check the labels carefully and seek professional guidance if unsure.

Probiotics are live microorganisms. Prebiotics are fibres or compounds that help feed beneficial gut bacteria. Some products contain both and may be called synbiotics. If you are sensitive to fibre, prebiotic-containing formulas may feel different from probiotic-only products.

No. This information is general only and does not replace personalised medical advice. If you are pregnant, breastfeeding, taking medication, immune-compromised, shopping for a child, managing digestive symptoms or unsure which probiotic suits you, speak with a qualified health professional before use.