60 Degrees Pharmaceuticals, Inc. (NASDAQ: SXTP; SXTPW) ("60 Degrees Pharma" or the "Company"), a pharmaceutical company focused on developing new medicines for vector-borne disease, today announced it submitted a New Dietary Ingredient Notification (NDIN) to the U.S. Food and Drug Administration (FDA) for Australian Chestnut Extract on March 11, 2026. FDA has until May 25, 2026, to object to the notification, after which the Company will be free to market its planned dietary supplement containing Australian Chestnut Extract.

The Company has also signed an option agreement to license Florida State University's (FSU) ownership rights related to new capsule formulation methods for Australian Chestnut Extract, which FSU jointly owns with the Company. This expands on the Company's January 2026 exercise of a license option with FSU for exclusive rights to large-scale purification of Castanospermine for non-prescription uses.

Australian Chestnut Extract is derived from the seeds of Castanospermum australe (commonly known as the Australian Chestnut, the Moreton Bay Chestnut, and the Black Bean Tree). The dominant molecular constituent of Australian Chestnut Extract is castanospermine.