Natasha Trenev, founder of Natren Probiotics on Stool Tests: After more than 60 years in the probiotic world, working alongside gastroenterologists, immunologists, and medical specialists, one thing has become very clear: Stool testing has limits. A stool test is just a snapshot in time. Your gut microbes can shift by as much as 60% in 24 hours, which means today’s results may look completely different tomorrow. It also only shows a small part of the picture. Your digestive tract is about 27 fee

Decoding a Stool Test