I took my atheletic son for bloodwork yesterday because he had been feeling weak in the morning and had been losing a lot of weight quickly. He eats very healthy; runs 6 miles a day, and plays trumpet. He is 6 feet tall, weighs 180 lbs and is 15 years old. Today the doctor called me and said the bloodwork showed a low glucose , low alcoline phosphate , and high CO2. he is running more tests on the blood for things I am not privy to at this time, but says he thinks it could be nutritional? should we be concerned? Should he still be running until this is figured out? Last night he had 3 episodes of blackouts lasting for 3 to 8 seconds.