Well, by my comments in the newsletter I was refering to packaging. They make their packaging look like it is a prescription product so that people will trust them.
Technically, a supplement is a component of food that has "nutritional" value. Ingestion of said supplement will not cause the body to change physiologically, which is to say, it won't push the body's physiology out of balance, but may prevent pathological processes (physiological imbalance) from occuring in the event of some stressor such as starvation, exhaustion, or illness (etc). But purely through nutritional pathways acting as a needed nutritional substrate.
A drug on the other hand doesn't have any nutritional value. A drug will accelerate or inhibit bodily systems and pathways by various mechanisms, most of which involve interacting with receptors, or inhibiting enzymes.
So, you can see that there are many "supplements" that are actually drugs. But that is not what I was refering to in the article. I was refering to the deceptive marketing practices designed to get people to think their product works, simply because the package and made-up name looks and sounds like a drug.