Yep, that’s just them spinning a reason. E.g. Tryptophan is used as the active ingrediants in some FDA approved medications such as Travasol and Prosol.
Using the FDAs line of reasoning, I conclude no more:
lamb, beef, pork, turkey, chicken, tuna, crab, oat, oat bran, eggs, white beans, Mozzarella, pumpkin seeds, etc, etc, etc
since these products contain a component that are also active ingredients in FDA-approved drugs.
The way it was spun makes it sound as though they are looking to protect the pharma’s business interests "because components … are active ingredients in FDA-approved drugs”