I wouldn't say perfectly normal, because normal doesn't translate into healthy. According to multiple studies, people with ferritin between 20-100 have increased life expectancy.
Decreased life expectancy with ferritin above 100, the average life expectancy with ferritin at 200 is 79 years old, above 500, 50 years old.
Ferritin is a marker of inflammation rather than iron status in overweight and obese individuals.
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