Today there are many male enhancement pill and capsule manufacturers who claim that their products can help to enlarge the penis. The ingredients of the pills vary from one manufacturer to another. The pills usually contain minerals, vitamins and herbal extracts. Most of these pills have Yohimbine as their most active ingredient. This ingredient is extracted from the Yohimbe Tree that is found in Africa. Before recommending the ingredient for human consumption it has been tested in animals for several years. Yohimbine is an alkaloid which is responsible for boosting the sexual drive as well as increasing a man’s stamina and male potency. Tests conducted on rats proved that the herbal ingredient boosted their sex drive as a result of which it was also called as an aphrodisiac. Yohimbine can help to raise the heart rate and blood pressure in humans. Since Yohimbine raises the blood circulation flow in the body, the manufacturers claim that it can help in getting harder erections of the penis during sexual intercourse.   
  
The best way to maintain the performance and size of the penis is to follow a nutritious and a healthy diet. Researchers also suggest that male enhancement capsules can help in getting harder erections for men who suffer from mild cases of erectile dysfunction. Experts also suggest that smoking is one of the most common causes of impotency as it hampers the flow of blood in the veins and arteries surrounding the penis. Excess drinking of alcohol can also lead to impotence and other disorders such as a sudden increase in weight. Weight can also affect the size of the penis as excess of body fat can actually “hide” the penis. You may have observed that obese man have a penis that is very small in size.   
  
Hence maintaining the penis can be achieved through normal exercises everyday as well as following a proper diet including natural supplements. Male enhancement supplements like Sinrex are very good source of zinc that helps to produce healthy sperm in men. Supplements containing vitamin E can also help as they help the body achieve a healthy blood circulatory system. Some doctors may suggest the use of penis enhancement pills to increase the length and duration of your erection.