Question: what are bokoblin guts for?
Answer: Bokoblin Guts are a material found in Breath of the Wild. They can be obtained as an uncommon drop by defeating higher ranked Bokoblin. It can be used to upgrade pieces of armor found in the game, such as the Hylian Trousers, but also can be traded with Kilton at his shop, the Fang and Bone, for 10 Mon each.