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Published Aug 12, 2025
Ask any doctor who works in a hospital how often theyve written an order for melatonin for an admitted patient who couldnt sleep whether they think it actually works
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However, factors such as poor nutrition, stress, and aging can deplete our stores
Gastrointestinal symptoms (more common with oral preparations): Mild nausea or upset stomach Diarrhoea (typically with very high doses) Other effects: Headache, particularly when treatment is first initiated Dizziness or light-headedness Skin reactions such as mild rash or itching Temporary reddish discolouration of urine (chromaturia) after hydroxocobalamin injections, which is harmless It is important to note that many symptoms attributed to B12 supplementation may actually represent the body's response to correcting a deficiency
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