It is to provide a pharmaceutical composition which is different from an existing therapeutic agent of an adult
disease, of a biochemical reaction-inhibiting type, and which action mechanism is to improve the basal
metabolism, wherein the composition has no side effects, and does not generate
drug resistance against adult
disease; and a method for preventing / treating an adult
disease by using the same. It is to provide a composition for preventing / ameliorating an adult disease such as
metabolic syndrome, diabetes,
hyperlipidemia, hypertension, impaired
liver function, renal failure, adiposity,
erectile dysfunction, menopausal disorder, shoulder discomfort, and
low back pain, comprising 5-aminolevulinic acid (ALA), its derivative, or salt thereof, preferably comprising ALA, its derivative, or salt thereof, and an iron compound such as
sodium ferrous citrate, iron
sodium citrate and iron
ammonium citrate; a food or
food material for preventing / ameliorating an adult disease comprising the composition; and a method for using the composition for preparing an agent for preventing / ameliorating an adult disease.