slow poison

Translations
медленный яд
Stress can act as a slow poison, affecting his health over time.
Стресс может действовать как медленный яд, постепенно влияя на его здоровье.
Definitions
A substance that causes gradual harm or deterioration to an individual over time, often leading to serious health issues or death, rather than an immediate lethal effect.
Words
slow

adjective
медленный
poison

noun
яд