The number goes up with age about 1 in 4 people aged 70 and older, and about 1 in 3 to almost 1 in 2 people aged 80 and above (Hicks et al., 2021)
The data is representative of three independent experiments and the standard deviation was calculated
The crucial caveat, of course, is that this applies to restoring youthful, healthy levelsnot creating excessive, supraphysiological ones
But doctors warn against unsupervised hormone use, or even unregulated supplements, which could be dangerous
You travel frequently and carrying syringes, vials, and sharps containers is impractical
KristalARKolarASFisherJLPlascakJJStumboPJWeissRet al