It's even more complicated, because it also depends on what yout eat for breakfast. Some food will sustain you for a longer time, some will give you an immediat

It's even more complicated, because it also depends on what yout eat for breakfast. Some food will sustain you for a longer time, some will give you an immediate sugary boost and then the inevitable fall (which could definitely be a big part of the "I feel lower energy when I eat breakfast" experience.