Tribulus terrestris is the #1 selling testosterone booster, and the best example of a supplement that increases libido, but has no effect on testosterone.
Ab belts may cause muscle contractions if used properly. But the belt alone cannot produce six-pack abs. The real challenge to ab definition is the layer of fat that lies right under the skin, hiding muscle tone.
You are more than likely already familiar with the fact that wearing a seat belt can save your life, which is the most important reason to always have the safety belt buckled around you. However, there are plenty of other reasons to wear this protection, too. These various reasons can include: