Mass Gainer is a powerful weight-gain formula loaded with enough nutrients to help you pack on the size!

Mass Gainer

  • Build solid muscle mass!  Opto Mass Gainer features 40 grams of protein enriched with EAAs, BCAAs, and glutamine to help build and repair your hard-working muscles.  This powerful formula is loaded with nutrient-dense calories derived from high-quality, fast, medium, and slow-digesting proteins and healthy fats. Energetic complex carbohydrates will give you quick-burning fuel to satisfy your energy demands.  Digestive enzymes will assist digestion of the protein and make it readily available to your muscles.

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