Optimum Nutrition is an established company in the supplement field and has been operating for years. Serious Mass is its highest calorie weight gainer, and the statistics are quite eye watering. It contains 1,250 calories when mixed with water (a whopping 1,640 calories when mixed with low fat milk) alongside 250g of carbohydrates and 50g… Read More

**** UPDATE: Please note — while you can still buy this product on Amazon UK (only 1 left in stock at the time of writing), this particular variation of the product seems to have been officially discontinued by USN. You may want to try USN’s Muscle Fuel Anabolic instead. **** USN Hyperbolic Mass is a… Read More

If you’re keen to hit your muscle building goals this year, or have taken whey or other muscle-building supplements in the past, then chances are you’ve also considered taking a mass gainer… but what exactly are they? Mass gainers are supplements designed to increase your daily calorie intake. They provide a source of lean protein,… Read More