Unrelated to diet but still could be helpful with brain fog: Have you ever been tested for sleep apnea? I was diagnosed with severe sleep apnea over a decade

Unrelated to diet but still could be helpful with brain fog: Have you ever been tested for sleep apnea? I was diagnosed with severe sleep apnea over a decade ago and was prescribed a CPAP machine. Although it took some getting used to. Getting effective sleep has helped me.