How long has Serenol been on the market? Bonafide Health November 15, 2019 15:11 Updated Follow Serenol was launched in the US in 2015. Related articles What is the differentiator for Serenol when compared to other supplements? How long does Serenol take to work? What is Royal jelly and why was it added to Serenol? Is Serenol approved by the FDA (Food and Drug Administration)? What are the ingredients in Serenol? Comments 0 comments Article is closed for comments.