Probiotics For Those On Antibiotics helps maintain gut balance through antibiotic courses by delivering live cultures that arrive at the gut, helping minimise typical antibiotic side effects. This combination of strains: Lactobacillus rhamnosus Rosell-11, Bifidobacterium lactis Lafti B94, and Lactobacillus acidophilus/helveticus Rosell-52, is included to help them survive the gut journey effectively for probiotics for gut health. OptiBac is a UK brand trusted by healthcare professionals and customers alike for its probiotic expertise. It’s simple to fit into daily routine.

Available Sizes & Variants:

10 capsules - convenient daily dose during antibiotics.

Benefits & Features:

• Supports gut balance during antibiotic use.
• This combination of strains: Lactobacillus rhamnosus Rosell-11, Bifidobacterium lactis Lafti B94, and Lactobacillus acidophilus/helveticus Rosell-52, is included to help them survive the gut journey effectively.
• Suitable for vegetarians and vegans, with dairy free gluten free formulation.
• Take one capsule daily with breakfast during antibiotic use and for a few days after.
• OptiBac is a trusted UK brand known for friendly bacteria supplements.

OptiBac has built its reputation in the UK by focusing on real world gut needs, not just abstract science. The three strains are formulated to survive gastric acidity and bile, helping them reach the gut even during antibiotics. The product is vegan, dairy free, gluten free, and suitable for those with sensitivities, reinforcing the brand’s commitment to accessible, inclusive nutrition. Made in the UK to high quality standards, these probiotics are a dependable choice for daily gut support during antibiotic courses. Quality matters.

'-Lactobacillus helveticus Rosell-52
-Lactobacillus rhamnosus Rosell-11
-Bifidobacterium longum Rosell-175

• GTIN: 5060086610062
• Manufacturer: OptiBac
• Categories: Cranberry Supplements for Urinary HealthGut Health SupplementsNew ArrivalsOptiBacProbiotic Tablets, Capsules & Liquids
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

This food supplement is suitable for adults and children aged 1 year and above. Recommended use:

- Take one capsule daily with food, ideally at breakfast, throughout your antibiotic course and for a few days after, or until the pack is finished.
- It can be taken along with antibiotics—its strains are clinically tested to reach the gut alive when used with antibiotics.
- Drink plenty of water during your live cultures course.
- If you have difficulty swallowing capsules, open them and mix the contents into a cool meal or drink.

Storage instructions should be followed as directed. Six capsules daily or as directed by a healthcare professional.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Lactobacillus rhamnosus Rosell-11

Lactobacillus rhamnosus Rosell-11 is a probiotic strain that helps support your gut balance. It is one of several live cultures in there to help maintain a healthy gut environment during antibiotic use.

This capsule also clocks in with extra strains, giving you a combined total of at least 4.5 billion live microorganisms per daily dose and designed to survive gastric acidity for delivery to the gut.

What Does Lactobacillus rhamnosus Rosell-11 Do?

Evidence suggests these live cultures still reach the gut alive during antibiotic treatment, which may help restore beneficial bacteria and keep gut balance. NHS/EFSA-aligned language backs the role of gut bacteria in normal digestion and immune support in line with approved nutrition claims.

Dr. Nagulesapillai from a university noted that these strains survive transit to the gut even when antibiotics are used, showing their resilience in everyday use.

OptiBac is Welzo's trusted pick for Probiotics For Those On Antibiotics because this brand embodies production excellence and a long-standing commitment to gut health solutions. This brand has established itself as the UK's most recommended probiotic brand by consumers and is regularly endorsed by healthcare professionals, reflecting solid industry standing and real-world trust.

OptiBac shows solid brand quality thanks to UK-based production and a clear quality guarantee of at least 4.5 billion live microorganisms per capsule, backing consistent potency across batches. Its formulation approach centres on strains that are well-researched and able to survive gastric acidity and bile, aligning with Welzo’s emphasis on reliability when taken with antibiotics. This product development philosophy shows a thoughtful balance of science-led strain selection and practical usability, such as vegetarian and allergen-friendly ingredients.

Welzo teamed up with OptiBac as our expert crew evaluated their reputation, production standards, and product robustness, making sure the brand aligns with our quality criteria. This blend of brand credibility and product integrity fits our rigorous standards for candid, science-based supplementation. For our team review, see Welzo's healthcare professionals and our ingredient quality and purity standards here and here.