Not everyone needs to be doing keto (especially if you’re active and doing cardio) - though getting protein in your diet I think is one of the few things that’s generally agreed to be good (I just use whey powder shakes as a vegetarian).

I do often skip breakfast also, but will typically have cheerios as my first food around 1pm or so.

There’s just so much snake oil nonsense with nutrition information that I’m highly skeptical of most claims.