PROBLEM TO BE SOLVED: To provide health food eliminating stress or jitteriness to soften the feeling of insecurity, and having dementia-preventive effect or melancholy-preventive effect. SOLUTION: The health food contains Hypericum perforatum L. and/or its extract, and seed kernels of plants belonging to Prunus and/or its extract. The plants belonging to Prunus preferably comprise Prunus dulcis (Mill.) D. A. Webb and/or Prunus persica (L.) Bat, sch. COPYRIGHT: (C)2006,JPO&NCIPI