Making kefir at home is super simple and very cost effective. For just the cost of milk and about 5 minutes per day, I make my delicious kefir right in my kitchen. You can purchase commercially produced kefir at grocery stores for double the price of normal milk, but it's not the same as homemade. The commercially produced options are essentially a "kefir-like" manufactured product. The best, real kefir, is made at home.
In Part 1 of the My Bacteria series, I talked about my gut microbiome and the trillions of bacteria that live inside all of us. Your skin, the largest organ, is also home to a huge variety of living organisms. The skin is in constant contact with the world around us and for millions of years has evolved to live symbiotically with bacteria. These two environments, the skin, and the gut, host very different bacteria but the same basic concepts apply to maintaining a healthy relationship. Similar to my feed and seed concept for gut bacteria, your skin's bacteria require a protect and cultivate approach.
My most recent fascination with diet, health, and performance has been focused on the human microbiome. Our bodies are the host for trillions of bacteria. We have a positive symbiotic relationship with all these little germs, only a tiny percentage of them have the potential to be harmful. The discovery of antibiotics made a tremendous impact on modern medicine and protecting our health, but the medical community has now recognized that over use of these compounds is having negative consequences.