Professionsals know all about the good hype of making yogurt because of the probiotics. The bacteria found in yoghurts at your local store are good but not great as they dont have many strains of healthy bacteria usally 1 to 4. Better yoghurts are now available that generate gcmaf proteins https://www.gcmafproducts.com/store/p35/www.gcmafproducts.com/store/p17/GCMAF_YOGURT_KIT_1ltr.html.html