The invention relates to a plant fiber product for oral use, said productcontaining a mixture of at least: plant fibers；and at least one added substance intended to be released from the product whensaid product is used. The invention is character-izedin that the product contains an alginate composition, dispersed in the productand comprising at least water, alginate and theadded substance, said composition containing an alginate matrix that firmlyretains at least a major proportion of the added substanceso long as the matrix is intact, and the alginate matrix being formed so as todisintegrate and/or dissolve in the chemical andphysical environment that exists in a user's mouth. The invention also relatesto a method for preparing such a plant fiber product.
