Probiotics are generally too much of a "magic bullet" -- if you're serious about changing your microbiome, the most effective way is through dietary changes. Wh

Probiotics are generally too much of a "magic bullet" -- if you're serious about changing your microbiome, the most effective way is through dietary changes. What you eat is ultimately the vast majority of what your gut microbes consume; high sugar and high starch foods tend to lead to an unhealthy microbiome. Many people avoid grains for this reason as well. The types of bacteria that thrive in your gut varies depending on what you eat. High fiber is more likely to result in a healthy balance of gut bacteria. However, if you already suffer from a damaged gut, a high fiber diet can be difficult, so be sure to increase fiber slowly, and with awareness of how it affects your body. That being said, if you want probiotics, plain whole milk yogurt is the way to go. (If you can handle dairy.) I avoid the bifido type bacteria; though that is for very specific reasons. Acidopholus, l. casei, Lactobacillus bulgaricus and Streptococcus thermophilus are all fine, the latter two being the traditional yogurt bacteria.