A lower than normal testosterone level in a man can cause low energy levels, low sex drive, anger, irritability, sadness, nervousness and many other problems.

A doctor can check testosterone levels with a simple blood test. Saliva self-tests are also available. There are many products that claim to boost testosterone levels. These are herbal supplements and vitamin products. Some have supporting clinical trials and research and some are folk remedies. Others contain other hormones or steroids.

Two products were recently banned by the FDA, because they were found to contain anabolic steroids, which are controlled substances and cannot be sold without a prescription. Safety and quality assurance of