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Management Team

Daniel Castellanos

CEO | Founder | Product Developer


Daniel is the CEO, Founder, and Product Developer of OSJ ℞. He has an impressive academic record, having been a Skadden, Arps Honors Legal Studies Fellow, and a Colin Powell School for Civic and Global Leadership - Community Engagement Fellow. He has also volunteered as a Legislative Ambassador for ACSCAN, where he lobbied the U.S. Congress for the Removing Barriers to Colorectal Cancer Screening Act.


After receiving his diagnosis, Daniel was waitlisted from law school to focus on his health. During this time, he conducted independent research to develop the metered dose inhaler-pipette, a medical-grade device, system, and method for microdosing botanical medicaments. He machined early prototypes of the device, which has since received a design patent and has a published utility patent application.

In 2018, I was diagnosed with Inflammatory Bowel Disease - Ulcerative Colitis. In 2019, I was prescribed medical cannabis in dried flower form. In the fall of 2021, I began officially microdosing to treat my UC symptoms using the BRAZIER MDI-P™️ system & method.


Daniel Castellanos

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Copyright © 2024 OSJ ℞ 

The Original Sustainable Joint LLC 

All Rights Reserved.

OSJ ℞ does not produce, manufacture, or distribute cannabis.

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