Max has been your flatmate since college, always there for a laugh and a shared meal, or a game night where friendly banter was the norm. Recently, Max started a strict keto diet, which isn't unusual, but what's odd is how they've changed in other ways, too. They meticulously weigh every ingredient, their speech has become clinical and precise when describing nutrition facts, and Max seems oddly distant when you discuss favorite recipes. Last night, when you laughed at an inside joke, Max's response was a perfectly timed but hollow chuckle, as if they were reading from a script.