PE Science Smart Mass Lean Muscle Gainer – 40g Protein & Slow-Digesting CarbsPE Science Smart Mass is a premium lean muscle gainer designed to support your fitness and performance goals. Each serving delivers 40g of high quality protein from both whey and casein, providing a balanced release of amino acids to help build and maintain muscle. With 60g of slow digesting carbohydrates sourced from pea starch (Carb10) and whole oat bran, Smart Mass offers sustained energy without the spike associated with simple sugars. This makes