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# 4 Warning Letters Sent to Marijuana-derived Product Marketers
- URL: https://www.fdaweb.com/4-warning-letters-sent-to-marijuana-derived-product-marketers/
- Published: 2017-11-01T12:00:00.000Z
- Updated: 2026-09-14T22:59:29.000Z
- Author: David McFarland
- Tags: FDA Policy/General, #legacy-id-D5140024

FDA has sent Warning Letters to four companies that marketed marijuana-derived products as cancer treatments. “Selling these unapproved products with unsubstantiated therapeutic claims is not only a violation of the Federal Food, Drug and Cosmetic Act, but also can put patients at risk as these products have not been proven to be safe or effective,” an [agency release](https://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm583295.htm?ref=fdaweb.com) says. FDA sent the letters to [Greenroads Health](https://www.fda.gov/ICECI/EnforcementActions/WarningLetters/2017/ucm583188.htm?ref=fdaweb.com), [Natural Alchemist](https://www.fda.gov/ICECI/EnforcementActions/WarningLetters/2017/ucm583205.htm?ref=fdaweb.com), [That’s Natural! Marketing and Consulting,](https://www.fda.gov/ICECI/EnforcementActions/WarningLetters/2017/ucm583197.htm?ref=fdaweb.com) and [Stanley Brothers Social Enterprises LLC](https://www.fda.gov/ICECI/EnforcementActions/WarningLetters/2017/ucm583192.htm?ref=fdaweb.com), citing unsubstantiated claims related to more than 25 different products spanning multiple product Web pages, online stores and social media websites.