Initially, it was believed that growth hormone actually prolonged lifespan due to a 1990 study that indicated that injection of growth hormone to men over 60 years of age appeared to reverse various biomarkers implicated in aging, such as decreased muscle mass, bone density, skin thickness, and increased adipose tissue.[14] However, a 1999 study found that administering growth hormone also significantly increased mortality rate.[15]

вывод не факт что по биомаркерам можно окончательно судить

https://www.reddit.com/r/longevity/comments/ohocpz/just_a_reminder_to_people_who_are_taking/