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The main difference lies in their chemical structure

Some believe maintaining proper B12 levels supports immune system health

Avoid self-administering or altering the dosage without medical guidance

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MELATONIN SYNTHESIS AND METABOLISM Melatonin Synthesis Melatonin (N-acetyl-5-methoxytryptamine) is synthesized within the pinealocytes from tryptophan, mostly occurring during the dark phase of the day, when there is a major increase in the activity of serotonin-N-acetyltransferase (arylalkylamine N-acetyltransferase, AA-NAT), responsible for the transformation of 5-hydroxytryptamine (5HT, serotonin) to N-acetylserotonin (NAS) (Figure 1)