Refined sugar is harmful for us, this is the reason that many people are looking for healthy alternatives. There are many low-calorie sweeteners in the market but most of them are artificial. Stevia is a popular sweetener because it is a 100% natural and zero calorie sweeteners with many health benefits. Stevia is a green leafy plant native to South America, been used for more than 1,500 years by South Americans, they call it "sweet herb". The leaves have been used traditionally for hundreds of years in both Brazil and Paraguay to sweeten local teas and medicines. In 1931 two French chemists isolated the glycosides that give stevia its sweet taste. The active compounds of stevia are steviol glycosides (mainly stevioside and rebaudioside) which are hundred times sweeter than sugar. Stevia Leaves are heat stable, pH stable and not fermentable.