Fibremaxxing is everywhere, and most of us should eat more roughage, but your gut won’t thank you for overloading Fibremaxxing is everywhere, and most of us should eat more roughage, but your gut won’t thank you for overloading F ibre has replaced protein as TikTok health influencers’ macronutrient du jour, with “ fibremaxxers ” urging followers to pack as much roughage into their diets as possible. But is the sky really the limit? “In theory,” says Dr Emily Leeming, a dietitian at King’s