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![NBCNews Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::14173315.png) NBC News [@NBCNews](/creator/twitter/NBCNews) on x 9.4M followers
Created: 2025-07-07 14:00:37 UTC

Nearly X in X Americans may have an undiagnosed iron deficiency, a problem that can lead to fatigue, brain fog and difficulty concentrating, a new study suggests. 

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XXXXXX engagements

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