YOUR GUT MICROBIOME CAN FORETELL YOUR FUTURE I just finished finishing reading Brain Maker [2015, Little Brown & Co., $28 ($12 at Amazon)], a fascinating book by David Perlmutter, MD. Its subtitle, The Power of Gut Microbes to Heal and Protect Your Brain—for Life, pretty much explains its subject matter. You are home to some 30 to 50 trillion microscopic creatures, mostly bacteria, both inside and outside your body. These bacteria create a micro-ecosystem called the microbiome (along with fungi, viruses and archaea). Your gut hosts by far the most bacteria Dr. Perlmutter, one of the nation’s leading neurologists, explains...