@itasarah Honey is laden with fructose. The only organ in your body that can use it/change it to something else is your liver. It's high calorie with some other elements and enzymes, but I have never heard of it helping with brain fog (which could just be my limitation and doesn't mean it's not a thing). Table sugar, the plain old stuff we all use, is half-'n-half sucrose and fructose....so if you ingest any sugar in anything, you're already getting what honey offers.
https://sensiqnootropics.com/blogs/news/honey-and-brain-fog-what-research-shows-today
Brain fog can have many origins, from sleep apnea to electrolyte problems, insufficient sleep, drugs that are prescribed, vascular degeneration or disorders in the brain, to name but a few.

One thing that can possibly help with brain fog and with a general dull mood each day is physical exertion, or exercise. Even just going out and managing a pretty brisk pace for ten minutes, if you can manage it with any other health concerns, can do wonders for brain vascularization and mood, but also improve cognitive function. This is well-established in the literature:
https://www.health.harvard.edu/mind-and-mood/exercise-can-boost-your-memory-and-thinking-skills