Mass gainers contain far more calories than whey protein.
Tips
usage
Compare with 蛋白粉 (dànbáifěn, whey protein) — 增重粉 is for skinny gym-goers (硬汉 hard-gainers) who want to bulk up; it's protein plus a heavy dose of carbs. Common term in 健身 (jiànshēn, fitness) circles.