Testosterone can make all the difference at the gym and in the bedroom. The problem is: as men approach their 30s, most experience a decrease in testosterone production, forcing them to visit their GP for a total testosterone level check. Before going down this path, one way men may boost testosterone levels is to maintain muscle mass.

To do this, there are two words to remember: anabolic and catabolic. These are key factors that determine whether the body can increase its testosterone levels or whether they diminish with age. 

Being anabolic is the key. This means the body is building and repairing muscle and looking after vital organs. On the other hand, if the body is in catabolic state, the metabolism slows down, and the body begins to eat away at that the hard-earned muscle and increases the ageing process.