They remain chemicals!
Establishing and monitoring the quality of these products, such as tablets/capsules, follow fundamental principles of chemical sciences. Unfortunately, these principles are ignored and violated under non-scientific practices such as regulatory guidance/requirements or pharmacopoeial standards. Hence, the fact remains that no one is monitoring, or can monitor, the quality of these products, no matter how or who presents/promotes them – claims would be false.
The manufactures do not have the freedom to manufacture quality products because they have to comply with irrelevant and non-GMP regulatory requirements and standards.
On the other hand, if the “quality” of the products is defined with a measurable parameter that is surprisingly simple and straight forward, it will become much simpler and more efficient to establish, monitor, and manufacture quality pharmaceutical/medicinal products.
The following links (1, 2. 3. 4) provide relevant references for further details.