Agave Syrup. Agave is a perennial plant found in the hot and dry regions of Mexico and the southwestern United States. It has been used for centuries in Mexico to produce their national drink, our well-known tequila. Apart from that, however, we also get nectar from agave, known as agave syrup, which is widely used as a sweetener and in recent years has been a substitute for sugar, which is gaining more and more ground. In contrast to sugar it contains mainly fructose (56%) and much less glucose than it. This makes the syrup a sweetener with a much lower glycemic index than common sugar. Replacing sugar with agave syrup results in a lower increase in blood sugar and therefore better management and regulation of blood glucose in diabetic patients.