Dr. Sebi (born Alfredo Darrington Bowman), a Honduran-born herbalist and alternative health figure who became popular in the U.S. during the 1980sโ1990s, claimed that humans do not breathe through the lungs but through the blood, arguing that the lungs only cool the blood and that true โbreathingโ happens at a cellular level through oxygenated blood. This idea often appears in quotes and social media posts associated with him.