trest is non 17a methyl.
the 7a methyl isn't a worry, I'm sure it has minor hepatotoxicity, but nothing on the scale of a 17a methyl.
if it's as orally bioavailable as claimed, and is resistant to liver breakdown, it has to post some risk to hepatotoxicity. but again, not as much as if it was 17a methyl.
this super short half life im sure though helps prevent this to some degree also.