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GRINBIZZ Weight Gainer helps improve muscular strength, tone muscles and gain muscle weight. helps regulate proper metabolism and gain weight naturally. Weight Gainer helps muscle growth, strength gains, maximum power output, and endless endurance with just two capsules per day. Boost Energy and Endurance: Weight Gainer supplement helps to increase blood flow by relaxing the inner muscle of your blood vessels causing them to widen. This effect will give you added energy and endurance. Weight gainer contains protein in each serving which triggers the synthesis of new muscle tissues and boosts muscle recovery. This heavy mass weight gain supplement helps to refill the glycogen reserves in the body which are used as fuel during intense workouts.