Whey protein can be a helpful supplement for those looking to bulk up, as it provides a high-quality source of protein that can help support muscle growth and repair. However, it's important to understand that building muscle mass is a multi-faceted process that involves a combination of proper training, adequate calorie and protein intake, and adequate rest and recovery. Simply consuming whey protein alone is unlikely to result in significant muscle gains.
In order to bulk up, it's important to consume more calories than you are burning and to make sure that those calories are coming from a balanced diet that includes sufficient amounts of protein, carbohydrates, and healthy fats. Resistance training, such as weightlifting, is also critical for building muscle mass.
Whey protein can be a convenient and effective way to help meet your daily protein needs and support muscle growth and recovery when combined with a balanced diet and regular exercise. However, it's best to consult with a healthcare professional or registered dietitian for personalized advice and guidance.