I’ve been experimenting with different breakfast options for decades.
In 1998-1999, it was at least 80% fat while on a Cyclic Ketogenic Diet (CKD). For the last 12 years, I’ve mostly consumed Slow-Carb Diet options shared in The 4-Hour Body (e.g. like this low-carb, high-protein, breakfast you can make in under 3 minutes, though I now use whole eggs).
I occasionally experiment with intermittent fasting, and the video below shares my current super-light breakfast that I use before most training and early morning travel. If hypertrophy (adding muscle) is my main objective, I still default to Slow-Carb and 30 grams of protein within 30 minutes of waking.
Here are some of the products I mention in this video: