This invention addresses the problem of enhancing the richness of generic processed food and beverage items without imparting a disagreeable flavor and without increasing the calorie count or salt content. The additive to be added in this case is preferably a generic food item that is highly safe. An appropriate amount of a yeast extract is added to a generic processed food and beverage item, the yeast extract having a peptide content of 5 wt% or higher, an RNA content of 5 wt% or higher, a free amino acid content of 6 wt% or lower, a glutathione content of 0.5 wt% or higher, and preferably, additionally a dietary fiber content of 15 wt% or higher.［課題］ 本發明之課題係不會賦予異味，且不會提高卡路里、鹽分，而增強一般加工飲食品之濃郁感。此時所添加者期望係一般之食品，且為安全性高者。 ［解決方法］ 對於一般加工飲食品適量地添加酵母萃取物，該酵母萃取物係肽含量為5重量%以上、RNA含量為5重量%以上、游離胺基酸含量為6重量%以下、麩胱甘肽含量為0.5重量%以上，更理想為其食物纖維含量為15重量%以上。
