The best example I can think of is Barry Bonds. Busted. He blew up like birthday balloon on whatever he was taking. His trainer / batting coach said his helmet size went up which was obvious. He got nailed. His out was blaming his trainer / supplier for his ‘vitamins’, said he did not know what he was taking, just following orders. Sure
. Don’t know how it all played out but he was a much better player when ‘on’ then ‘off ‘ like him our not and not many people did. Think attitude.
That being said, when it comes to batting he is said too have said, it does not make you eyeballs stronger but my purely uneducated guess is that it can’t hurt, might help fielding (stronger runner?) and bat speed but again, speculation on my part.
Hope this is not too far off topic . . .