low sperm count

Ok so... my bf has a sperm count of 140 right now and he went to the urologist yesterday. He suggested that he get the pellets. I know there are also gels and injections. Has anyone's hubby had this problem? What did he use? Did he get back up to a healthy sperm count? At least like 300-400 range... 
Also, can anyone recommend any supplements or food that can boost it naturally? 🙏🏼