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.
One of the six cups from Dunkinâ Donuts had 32 mg; one from Seattleâs Best had 29 mg; and one from Starbucks had 21 mg. Levels of caffeine in the decaffeinated coffees we tested varied within chains, but in our sample, McDonaldâs decaf consistently had less than 5 mg.