We all need, and depend on beneficial bacteria. They live in our intestines and are a first line of defence against undesirable bugs. A great way to reinoculate your microbiome is to take a probiotic supplement containing Lactobacillus Acidophilus and Bifidobacteria daily for a week. Keep them in the fridge to use if you ever drink too much alcohol, get a gut infection or have a course of antibiotics.