This is 1kg of Mannan Hikari. It's new and unopened. Expiration date: January 2027 I've been eating Mannan Hikari every day for over 15 years. My whole family eats it, so it's recommended for your husband's diet and for managing your children's health! If you have any questions before purchasing, please feel free to comment, and I'll answer them to the best of my ability. *Due to the already low price, please refrain from price negotiations.*