BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention provides an agent for preventing deterioration of perfumes, fragrances, flavors, etc. (hereinafter these are collectively called flavors, and the agent is referred to as a flavor-retention agent) obtained from natural
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a preservative auxiliary material for foods, etc., comprising white sweet potato (Simon). More particularly, it relates to an auxiliary material applicable to the whole range of foods as well as to animal feeds which can