Medical doctors and food researchers explain the significance of seasonal foods. You can really understand the meaning of "ishoku-dogen" (the concept that food and medicine come from the same source). Finally, water is also discussed as a health essay. I am an amateur in terms of storage, but I do not smoke, nor do I have any pets. For shipping, I will double-package the item to prevent it from getting wet. It may be a little difficult to open, but please understand. Instant purchase is welcome. Thank you.