Protein is having a cultural moment, and celebrities are cashing in with a wave of star-backed nutrition brands reshaping the snack aisle. From Khloé Kardashian’s popcorn to Venus Williams’ plant-based shakes, the formula tends to be similar across launches, with a celebrity partnering with a nutrition company and building the product around a specific protein claim. Kardashian’s Khloud line applies milk protein isolate to two familiar snacks, with its protein popcorn and protein chips both delivering seven grams of protein per serving. Venus Williams’ Happy Viking line centers on plant-based protein powders and shakes built around a "30/10 rule," delivering 30g of plant-based protein and 10g of fiber per serving. Patrick Schwarzenegger and Maria Shriver’s MOSH bars are marketed as protein bars with a brain-health focus. Other celebrity protein brands include Mel Robbins’ PureGenius Protein, which offers 100-calorie, zero sugar, zero fat protein shots, and Mark Wahlberg’s Performance Inspired, which spans protein powder, protein bars, pre-workout, creatine and recovery supplements, with its whey protein delivering 25 grams per serving.