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.
McDonald's coffee. Unlike Starbucks coffee, McDonald's drip offers roughly the same amount of caffeine as a standard cup of joe, according to the folks over at CaffeineInformer.com. The chain does not currently report the amount of caffeine in its coffee, but Caffeine Informer says each 12-ounce cup has 109 mg of caffeine.