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Yellow bone marrow serves primarily as a storehouse for fats, but it may be converted to red marrow under certain conditions, such as severe blood loss or fever.—Scott Lafee, San Diego Union-Tribune, 23 Dec. 2025 Radiologists who studied the MRIs found that girls with anorexia had very high fat content in their knees and less than half as much healthy red marrow.—Smriti Rao, Discover Magazine, 10 Feb. 2010