Cigarettes and Other Tobacco Products. Revised May 2016. Provides an overview of the effects of cigarette and other tobacco products, including their effect on the brain, other health effects, approaches to smoking or nicotine cessation, and overall use among youth.
The average male adult has about 5 million red blood cells per cubic millimeter of blood, while the average female adult has about 4.5 million red blood cells per cubic milliliter of blood. This may vary by about 300,000 to 500,000 red blood cells.
Normal RDW is between 10.2% to 14.5%. So what it describes essentially the normal variation in red cell size - as in Normal state, some red cell are new - reticulocytes [about 2% or so], then some old cells are fragmented, so the normal RDW is calculated to be between those values.