Buttered Coffee Could Make You Invincible. And This Man Very Rich

I'm not a fan of this kind of profiteering. Coffee + Butter is good for you? Great. Selling your own brand for a premium, I think, is awful, empty advertizing hype at it's best.

Where's the transparency and duplicate studies about coffee bean mycotoxins and toxicity levels? What's the effective dose, LD50? And how much is in a "poisoned" cup of coffee?