What is PhD Nutrition Smart Protein? Protein supports the growth and maintenance of muscle tissue, which is why its importance is recognised by those who train regularly. PhD Smart Protein is a high quality protein powder with an unrivalled taste that is incredibly versatile; it can be enjoyed at any time of the day, to help you meet your fitness goals. PhD recommend that your use this product to create delicious desserts and to factor into some macro-friendly baking! This makes supplementing protein so effortlessly enjoyable! || Easy to mix and prepare (zero clumping!). || Low in sugar/carbohydrates.