https://www.myupchar.com/en/disease/brain-fog I haven't read this myself yet. I don't tend to come across many articles on this so I thought I would share it.
Driving potential customers to their site is what they may get out of the effort they put into writing the article; but is the article itself flawed?
Okay, it's just people reading your message could think that was what you were saying i.e. that the article was flawed.
How exactly could the article be correct? There is nowhere near enough that is known and understood about 'brain fog' (an extremely vague term) to say anything useful. The only useful thing to say would be to have a conversation about how to get at defining what it is by talking to people who experience it so that it might be properly investigated.