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[1] By contrast, drugs like methylphenidate, Adderall, or modafinil, sometimes called cognitive enhancers, are powerful stimulants approved for ADHD or sleep disorders and require medical supervision

doi: 10.1080/02640414.2013.773403

The key molecules associated with the former include xCT, GSH, GPX4, intracellular labile iron, and ferroptosis-inhibitory pathways
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In both cases, regular, consistent use within an appropriate routine is the practical takeaway, not a precise clock time
