Good question: Because hemoglobin that coats red blood cells delivers oxygen to all our tissues, including (of course) the brain. Fatigue is a symptom of poor cellular energy production. Please see my blog "oxygen the spark of life".
Answered 7/14/2013
5k views
6 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question