Around 0 it will escalate even further But you can reverse a lot of the effects using a testosterone booster like Provexum How to Tell You Have Low Levels of Testosterone There are many different signs that tell that you have low levels of testosterone For guys working out in the gym one clear sign is a lack of progression with your muscle building You are simply not getting bigger or stronger no matter what you do Another sign of low levels of testosterone is that you are starting to get fat despite eating the same as you always have done Low levels of testosterone cause your muscles to shrink and you will be burning fewer calories Fewer calories mean that you will start to accumulate belly fat Just take a look at men around the age of thirty with the so called beer belly It is a sign of low testosterone levels The good thing is that you can reverse all this by using a testosterone booster like.