A preliminary study investigated the effects of randomly assigned methyl- and cyanocobalamin on arcadian rhythms, wellbeing, alertness and concentration after 14 days in 20 healthy subjects (Mayer et al 1996).
Methylcobalamin supplementation led to a significant decrease in daytime melatonin levels, improved sleep quality, shorter sleep cycles, increased feelings of alertness, better concentration, and a feeling of waking up refreshed in the morning. It appeared that methylcobalamin was significantly more effective than cobalamin.
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Salvation For The Sleep Deprived The Ultimate Guide To Sleeping, Napping, Resting And Restoring Your Energy. Of the many things that we do just instinctively and do not give much of a thought to, sleep is probably the most prominent one. Most of us sleep only because we have to. We sleep because we cannot stay awake all 24 hours in the day.