No it is not. If you want to consider informal logical fallacies, it is closest to "poisoning the well", as I am tarnishing his name in an effort to make you not believe is claims. I am not saying he is wrong because he is a quack, I am saying he is a quack, and here is an article going into why he is wrong.

> but I would love to see, someone debunking it with data

The problem is Seyfried doesn't have data. His science is bad and extrapolating from marginal results. Some parts of these ideas might pan out, but all I've seen indicates he's made this his hobby horse is riding it.