Lack of energy?

We have a friend who often have a full tiring day at work and doesn’t seem to have extra energy to go for our mamak session at night. At first we thought it is due to stress and we advice him to go for a medical check-up to get medical advice. After a blood check, the doctor found out his age is catching up and his testosterone level has decrease significantly. He is into some supplements and is following gym session lately which we could see a chirpier self esteem. May be this is what a lovegra side effects is.