Some mass gainers include creatine which can be used to improve recovery and weight gain. It helps improve muscle energy levels, combats muscle damage, and helps you replenish glycogen stores in muscle. It also improves cell volume and water uptake – which helps both short-term and long-term weight gain. Creatine Monohydrate is added to a range of mass gainers and other food supplements to offer diverse benefits. In a mass gainer, it’s a particularly great choice as it improves the way your body handles carbohydrates and protein, in particular – a great synergist.