Does Whey Protein Have Caffeine? Whey protein is a great way to get your daily protein intake, but if you’re concerned about caffeine, look for whey protein powder with less than 10 milligrams per serving. Whey Protein Powder Whey protein powder is derived from milk, and it’s a popular supplement for athletes. It’s also a great choice if you’re looking to gain muscle mass or lose weight. Does Whey Protein Have Caffeine? Whey protein is made up of whey protein concentrate (WPC), which contains all the essential amino acids needed by your body; and soy lecithin, which helps to emulsify the formula so that it mixes easily with water or…