Food allows the user to bite, chew, and digest anything that they are able to come into direct contact with.
Soramitsu is able to chew through objects with ease, and his targets do not seem to put up much resistance, whatsoever.
When the Quirk is used, it does not appear to make the user feel filled up at all, and has been referred to as bottomless. However, this does come with the requirement that Soramitsu has to be within biting range to use the Quirk, which can be used against him. The user's ability to eat anything does not extend to poison, meaning that the user will get ill if they consume toxic substances.