ANSWER: D-mannose is a naturally-occurring sugar that is found in small quantities in a variety of fruits, such as cranberries, blueberries, and peaches.
It can also be extracted from these fruits and produced commercially in a laboratory setting. In its pure form, D-mannose is a white, crystalline powder that is soluble in water. It is commonly used as a supplement to help prevent and treat urinary tract infections (UTIs).
To produce D-mannose commercially, the sugar is extracted from the fruits using a solvent, such as water or ethanol, and then purified and crystallised to create a pure, concentrated form of D-mannose. This process is similar to the way other sugars, such as sucrose or glucose, are produced commercially.
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