Hemoglobin: The oxygen-carrying pigment and predominant protein in the red blood cells. Hemoglobin forms an unstable, reversible bond with oxygen. In its oxygenated state it is called oxyhemoglobin and is bright red.
Caffeine by McDonalds Iced Coffee Size. 1  Medium (16 floz): 133mg. 2  Large (22 floz): 200mg. 3  Extra Large (32 floz): 320mg.
Decaf brewed coffee is a better bet, only containing a little caffeine, at 3-4 mg per cup. Iced tea contains 70 mg per 12 ozs (2-4 large 12 oz glasses is safe per day) and brewed tea contains 20-90 mg in 8 oz. Check the labels on tea to find out the exact caffeine content for your specific tea. Hidden sources of caffeine.