A health book explaining the importance of gut bacteria. - Title: The Best Balance of Gut Bacteria Creates a Body That Doesn't Get Sick - Author: Jun Sasaki - Recommender: Koichiro Fujita - Content: A health book explaining the importance of gut bacteria - Publisher: KK Best Sellers I previously obtained several copies and have been delivering them to those who need them. This one is new. I heard that gut bacteria are very important, so I gathered information. It's packed with information that I couldn't understand on my own, and it was good to learn about the mechanisms of soil bacteria and gut bacteria, as well as incorrect information and usage of supplements, cosmetics, lactic acid bacteria drinks, etc., from a researcher's perspective. I'm looking at this during work, so I'll reply as quickly as possible, but it will take 1-3 days to ship. It will take 4-7 days when I'm on a business trip or away from home. I will ship it compactly. Please understand. I am not negotiating prices. Please purchase at the listed price. Based on Mercari rules, I will give priority to the person who purchases, even if negotiations are in progress. Thank you for your understanding.