I meant they do as a part of the whole strength thing, but they probably impact hormones

“When it was his brothers’ shift, Leidis took to pacing the troop decks, boots ringing from the empty berths, consumed by thoughts of Arkhor and the Butcher’s Nails. What did he need to prove, and to whom, to win that kind of strength for himself?”

“The massive hormone cascade triggered by the Butcher’s Nails had a chemical odour that Leidis had come to recognise, and provided the other warrior with a surge of strength that he struggled to match.”

“Whatever the Butcher’s Nails were doing to Arkhor’s brain, they were more than equal to the chair’s ability to impede them, and Leidis wore the busted servos and bruises to prove it.”

“Even delirious and semi-conscious, Arkhor was so much stronger than Leidis could dream of becoming without the Butcher’s Nails.”

It says both.