Girls just want to have more protein — and the snack industry is cashing in.Once tied to the gym-bro stereotype of mysterious powders and potions, the category has gotten a glow-up, turning niche products into breakout hits. Today’s protein snacks encompass a wide range of products, from meat sticks and chicken chips to popcorn and milk, as well as shakes and ice cream, all enriched with added protein.As women increasingly embrace strength training and high-protein…