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.
The amount of caffeine in a particular coffee drink depends on the brew and beverage size: 1  Restaurant espresso (1 oz.) 40-75 mg. 2  Instant coffee (8 oz.) 27-173 mg. 3  Typical brewed coffee (8 oz.) 95-200 mg.  McDonald's brewed coffee (16 oz.) 100 1  mg. Starbucks brewed coffee (16 oz.) 330  mg.