Gaining lean mass requires that you run a 'moderate' calorie surplus, typically in the region of around 500 calories over maintenance level. In addition, it requires progressive resistance training emphasising increases in strength along with am optimum hormonal environment to maximally develop muscle and restrict fat gain.

The biggest priority is to pick a high protein mass gain product, followed in importance by a product to boost training performance, and finally, a natural testosterone booster to maximise muscle repair and development whilst keeping body fat low.

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