Comment by begueradj

Which apprentcieship are you talking about ? The one he had with the bookmaker ? He did not hire him to help him: he hired him only because he needed him, and Faraday was special as a child. Actually he was exploited by that bookmaker (worked without being paid for few years). It was during that period that he was reading books and he wrote one of his own (a huge selection of technical notes).

He spent 7 years in that library, if I remember. It was much later that Humphry Davy, the chemist, had offered him an internship: again, this chemist, did not hire him to support him but because he met him previously in the book shop where he worked, and many years later, he ad problems with his trainee, so he replaced him with Faraday whom he knew he was too curious and intelligent and cultivated.

So in both cases, Faraday was self taught, and made a huge effort to get the second internship with the chemist (he was rejected few times, if you call this adults supporting him).

And no, Faraday is not known for biology (but I supposed you meant "biography").

About your testosterone question: well, I have nothing to add.