@marcuoco: A mass gainer is a high-calorie dietary supplement designed to help individuals, particularly "hardgainers" with fast metabolisms, increase their daily calorie, protein, and carbohydrate intake to build muscle mass. These powders, often called weight gainers or weight gain protein powders, typically provide 300 to over 1,000 calories per serving. They are ideal for quick post-workout recovery or as a convenient, high-calorie meal replacement. #fyp #GymTok #muscle #massgainer #motivation