Mass gainer vs whey protein

The difference

Whey protein gives you protein with few calories. A mass gainer is protein plus a large amount of carbohydrate, so a serving can add several hundred calories.

Which one is right for you?

• Trying to build muscle while staying lean: whey protein.
• Struggling to eat enough to gain weight: a mass gainer can help you add calories.
• Not sure: start with whey and add calories from food first.