Xtreme Size Up

If you are one of those people who have a tough time packing on solid, powerful muscle, try MET-Rx Xtreme Size up (XSU), specially designed for hard gainers who want to gain weight and pack on quality mass.* MET-Rx XSU features Four Hardcore Optimizer Blends to help you keep growing when other weight gainers quit! Our specially selected nutrients are designed to meet your body's needs for both immediate and sustained energy and protein synthesis.

Metamyosyn Muscle Mass Optimizer Blend combines the trusted and clinically developed Metamyosyn protein blend, with extra Whey Protein, Creatine, Glutamine and naturally-occurring, high-quality BCAAs (Branched Chain Amino Acids) to provide sustained, highly bioavailable fuel for your body’s protein needs.

Research studies show that a blend of fast and slow proteins results in a more prolonged absorption rate allowing extended muscle-amino delivery. By extending the delivery of all essential amino acids to your muscles, MET-Rx XSU helps to prevent you from going into a catabolic state which can otherwise lead to muscle loss.

MET-Rx Metamyosyn Muscle Mass Optimizer Blend utilizes completeproteins from the finest sources to ensure every amino acid required by your muscles is supplied.

Lean Lipid Optimizer Blend contains just the right amount of dietary fats essential for staying lean without packing on unwanted body fat. We know that your goal is to pack inches onto your biceps rather than your waist, so we didn't compromise quality with loads of unhealthy fats that could slow down your progress.

Complex Carb Optimizer Blend contains High Fiber and top-quality complex carbs to intensify the time release effects of the Metamyosyn Muscle Mass Optimizer Blend and keep your muscles pumped with anabolic nutrients for a longer period. This specialized blend contains 64g of complex carbs, providing over 80% of the total carbohydrates in MET-Rx XSU (80g total carbs).

MultiVitamin Optimizer Blend is packed with a rich source of specially selected vitamins and minerals essential to carbohydrate, protein and fat metabolism. Optimal intake of key vitamins and minerals is especially important when following a high-calorie diet for mass gains, in order to assure proper usage and muscle metabolism of ingestedcalories. You can rest assured that our comprehensive blend of the right vitamins and minerals will complement your nutrition plan to support your bodybuilding goals and optimal health.

In order to make serious gains, you need to train hard, get lots of rest, and take in plenty of key nutrients. MET-Rx XSU makes it easy to get the high quality protein, complex carbs and essential nutrients that are important for a serious, intensive training program.

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