[irisgrunn]

The problem with bone density can be avoid with extra vitamin D (mentioned in the paper I linked).

Height is based on genetics, not puberty (again, see the paper I linked)

Vocal changes aren't affected at all, they will change as soon as an Testosterone based puberty is started. This is why trans man have low voices too.

[devvvvvvv]

You can't replace puberty with vitamins.

Puberty is when humans grow the most.

Women do not have low voices: https://www.youtube.com/watch?v=qoQ0ASTTI2g