Reported mild effects include: Commonly Reported Mild headaches: Some users report transient headaches, particularly in the first few days of use Anxiety or nervousness: A subset of users report increased anxiety, social anxiety, or a "jittery" sensation Overstimulation: Feeling mentally "wired," racing thoughts, or difficulty focusing despite cognitive goals Sleep disruption: Occasional reports of insomnia or vivid dreams if taken late in the day covered in depth in Dihexa, Sleep & Memory Consolidation: Vivid Dreams, REM & the 2026 Neuroscience Review, including parasomnia red flags and a practical dose-timing protocol Mood fluctuations: Some reports of subtle mood changes, though the direction (improvement vs
Viral protein Tat enhanced cellular expression of Nrf2 and its translocation into the nucleus
[PubMed] [PMC] Iliff JJ, Chen MJ, Plog BA, Zeppenfeld DM, Soltero M, Yang L, Singh I, Deane R, Nedergaard M (2014) Impairment of glymphatic pathway function promotes tau pathology after traumatic brain injury
This is because it loses a hydrogen ion
Gynecol.Oncol 2012;124(3):417-425
Certain medications, including chemotherapy drugs and blood thinners, may interact with high-dose vitamin C