OptiBac Probiotics 'For every day EXTRA Strength' has been created especially for those seeking a high-strength daily supplement of good bacteria. It contains the strain Lactobacillus acidophilus NCFM, thought to be the most researched strain of acidophilus in the world. Suggested for daily use, each capsule provides 20 billion live microorganisms proven to survive to reach the gut alive and guaranteed per capsule until the date of expiry. OptiBac Probiotics 'For every day EXTRA Strength' is suitable to take during pregnancy, for vegans and vegetarians, and is also gluten-free. Every pack contains 90 capsules, each with a count of over 20 billion live cultures including Lactobacillus acidophilus NCFM, and guaranteed until the date of expiry. All OptiBac Probiotics strains are thoroughly researched and documented, so you can be confident you're getting a high-quality supplement. It is important to note that this product, unlike some live culture products, does not require refrigeration due to improvements in freeze drying techniques and because the strains within the product are naturally robust to survive harsher conditions.