This probiotic is a lifesaver, I have been a long-time user, however, I do take breaks from using it, this time it was too long a break as I travelled to Europe in 2023 and caught a chest virus or infection with serious phlegm, and it was worsened by air travel back home. I was very ill and needed antibiotics twice, after the second round of antibiotics I remembered PROGURT and made my purchase, this action saved me from a third dose of antibiotics. It's been three weeks on Progurt and I am now really healing. I feel good at 74.