Luo han guo, also known as monk fruit, is a small green fruit native to southern China. It has been used for centuries in traditional Chinese medicine for its natural sweetness and potential health benefits. The fruit contains mogrosides, which are natural compounds that provide its sweet flavor without calories. In recent years, Luo han guo has gained popularity as a sugar substitute in various food and beverage products. It is often marketed as a healthier alternative to sugar and artificial sweeteners, appealing to those looking to reduce their sugar intake while still enjoying sweetness in their diets.