D-mannitol is an organic compound with the molecular formula C6H14O6. A colorless or white crystalline powder with a slightly sweet taste similar to sucrose. D-mannitol widely exists in many land and sea plants, such as olives, persimmon trees, etc.

The manufacturer of D-mannitol tells you that it is also abundant in some algae and fungi. It can be chemically obtained through the reduction of D-mannose and D-fructose, and it can be used clinically to reduce intracranial pressure and acute renal failure. It plays a certain role in medicine, food, feed, and life science research.
The manufacturer of D-mannitol tells you that it is a very important essential medicine on the World Health Organization's important medicine list. In plants, it is often used to reduce osmotic pressure.
Mannitol can be extracted from kelp or seaweed, D-mannitol manufacturers tell you, but electrolytic reduction or catalytic reduction of glucose or sucrose solution is often used.