Pay Attention to Your Environment
Environmental toxins like air pollution, herbicides & pesticides, paraffin candles, and harsh chemical cleaners — yes, even in your personal care products — can destroy your microbiome. Choosing natural, organic products whenever possible will help protect your bacteria.
Look to Your Food
The food that you feed yourself feeds your gut flora — so if you're eating foods that are at best, not nourishing, and at worst, damaging, your gut flora is going to suffer as well.

Dietary toxins (Ilke gluten), processed foods, sugary foods, and artificial sweeteners are all "conveniences" that dominate our modern diets — but these are things you want to AVOID. Instead, try to incorporate foods like whole foods .