Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Total Hemoglobin - Hemoglobin
Overview & Description
Hemoglobin is a protein in red blood cells. It carries oxygen from the lungs to cells throughout the body, and carries carbon dioxide from the cells to the lungs. A hemoglobin test measures the level of this protein in a sample of blood.
Who is a candidate for the test?
Often, this test is done as part of a complete blood count, or CBC. Or it may be done:
How is the test performed?
Blood for the test is usually taken from a person's forearm. First, a tight band is put on the upper arm to make the veins swell below it. An area of skin on the forearm over the vein chosen is cleansed. Then a needle is inserted into the vein and a sample of blood is collected in a tube.
Occasionally blood is taken from another site, such as a finger or heel. If so, the skin is cleansed and pricked with a sharp tool called a lancet. Drops of blood are collected in a tiny tube. The blood is analyzed at a lab.