text:  We do see some early research that is looking into older subjects, usually those living with Alzheimer's. But as I've said, it's early days. For now, though, we should recognize that these products are supplements. They aren't allowed to be officially marketed as medicines in much of the world. And although they may have been used a lot traditionally, which is a positive sign, proving their effectiveness on boosting well-being is going to be really difficult to test.