Serum iron Serum iron Serum iron is a medical laboratory test that measures the amount of circulating iron that is bound to transferrin (90%) and serum ferritin (10%). Clinicians order this laboratory test when they are concerned about iron deficiency, which can cause anemia and other problems. 65% of the iron in the body is bound up in hemoglobin molecules in red blood cells. About 4% is bound up in myoglobin molecules. Around 30% of the iron in the body is stored as ferritin or hemosiderin in the spleen, the bone marrow and the liver. Small amounts of iron can be found
Blood, Sweat & Tears 4 Blood, Sweat & Tears 4 Blood, Sweat & Tears 4 is the fourth album by the band Blood, Sweat & Tears, released in 1971. It peaked at number 10 on the Billboard Pop albums chart. The band invited former member Al Kooper to contribute the song "John the Baptist (Holy John)." Trombonist Dave Bargeron replaced Jerry Hyman. David Clayton-Thomas left as lead vocalist to pursue a solo career after the release of "BS&T 4", as did founding members Dick Halligan and Fred Lipsius. Clayton-Thomas would return to the lineup for "New City". Writing for Allmusic, critic William Ruhlman wrote "the