Complex sentence: For some people, increasing ferritin will eliminate or reduce RLS symptoms; a ferritin level of 50 µg/L is not sufficient for some sufferers and increasing the level to 80 µg/L may further reduce symptoms.
Split into simpler sentences: For some people, increasing ferritin will eliminate or reduce RLS symptoms. A ferritin level of 50 µg/L is not sufficient for some sufferers and increasing the level to 80 µg/L may further reduce symptoms.