Thanks very much for that Mario, it all makes sense. I have to say I found it a bit shocking the initial effect NAC had on my eyes (and I only started with 150mg per day). I never realised the effect that supplements / diet could have. Gritty sensation in the eyes gone within a few days, plus a new greasy sensation in the eyes (far more pleasant than grittiness I might add). These new sensations died down a bit a few days after but overall my eyes feel better since starting taking NAC

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