VSL3 Probiotic Food Supplement Sachets 10s VSL3 is a probiotic mixture containing 450 billion live lactic acid bacteria & bifidobacteria. It contains 8 different strains of beneficial bacteria which have been selected on the basis of scientific studies for their ability to colonize the gut. The recommended daily intake of VSL3 is 1-2 sachets a day. Most people start with 1 sachet per day for Approx. 2 weeks & then adjust as needed. It can take a few days or weeks for the balance of bacteria in the gut to adjust & may take up to one month to become stable. Open the sachet & stir the contents into cold water or any non-fizzy drink or food & consume immediately.