Probiotics are live bacteria and yeasts that support the balance of your gut microbiome, and the right strain matters as much as the dose. This range covers well-researched options including Optibac, Alflorex, and Super 8 high-strength capsules, giving you access to strains backed by clinical studies for specific needs, from everyday digestive maintenance to post-antibiotic recovery and bloating relief. Choosing a probiotic comes down to matching the strain to the reason you're taking it. Lactobacillus and Bifidobacterium strains are broadly used for gut health and immunity support, while targeted options like Alflorex contain the specific B. longum 35624 strain studied in IBS research. Dosage is measured in CFUs (colony-forming units); higher CFUs are not always better. Strain specificity and survivability through the digestive tract matter more. All products in this pharmacist-reviewed selection are sourced from trusted supplement brands with documented quality standards. If you are taking immunosuppressant medication or have an underlying health condition, speak with one of our pharmacists before starting a new probiotic. Browse the range below to find the option that fits your gut health goals.