rejuvenating agent; rejuvenation drug
Refers to a substance or medicine that restores youthfulness or vitality. Often used in contexts of anti-aging or revitalization.
This cosmetic is advertised as a rejuvenating agent.
Hoping for the effects of a rejuvenation drug, many people buy supplements.
Compound of 回春 (かいしゅん, 'return of spring' or 'rejuvenation') and 剤 (ざい, 'medicine' or 'agent'). The term is used in medical and commercial contexts for products claiming anti-aging effects.