Let's continue our overview of the herbal ingredients contained in the natural sex enhancer called Zenerx. I'm only going to cover two herbs here, but they're both pretty fascinating.

Tongkat Ali is fast becoming one of the most popular herbs in the world. It's a powerful Indonesian herb that enhances libido and causes increased muscle growth in bodybuilding athletes. In fact, the British Journal of Sports Medicine reported that the use of tongkat ali extract caused a 5 % increase in lean body mass in 5 weeks. The reason is an increase of testosterone.

Testosterone is a male hormone that builds muscle mass and strength, and increases bone mass, sperm production, sex drive, and potency. Unfortunately, testosterone starts to decline shortly after our teens. By age 30, the effects of this decline become pronounced.

Unlike many herbs, whose reputation is based more on anecdote than science, tongkat ali has been tested scientifically and proven to be effective in raising testosterone levels. Even better, there are no reported side effects.

Mucuna Pruriens is a tropical legume found in India, Africa, and the Caribbean. Its seeds contain a high concentration of something called levodopa, which is converted to dopamine in the human body.

Dopamine gives us pleasure! It's what is released in the body when people use cocaine, nicotine, or amphetamines. It's also released when we eat delicious food, or have good sex, or do something we're proud of. It's the body's way of telling us, "this is a good thing and we should do more of it." That's why drugs and cigarettes can be so addictive. But don't worry, mucuna pruriens the plant is definitely not addictive.

Throughout history, mucuna pruriens has been used as an aphrodisiac. In fact, that's how it gets it name ("pruriens" comes from the word "prurient", which means excessively interested in sex). It increases libido and also decreases your levels of prolactin. Prolactin is a hormone that is sort of the opposite of dopamine. After you orgasm, for example, your dopamine levels plummet and your prolactin levels shoot up. That's why you don't want any more sex after you orgasm.

Many men who have problems getting and maintaining an erection have high prolactin levels in their body. That's why mucuna pruriens works so well. It helps your body increase your level of dopamine, which in turn decreases your level of prolactin. The result is nice boost to your sexual abilities.

This concludes this 3-part hub exploring the herbs contained in the popular sex supplement Zenerx. Actually, there are even more ingredients in Zenerx, but I think I'll stop here.

Robert Henderson is an expert on herbal remedies. To find out more about Zenerx---how it works, where to buy it---please visit Zenerx (or Zenerex).