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Watch out for melatonin, it might cause/increase depression (or depressive thoughts). Source: Safety instructions on a box of melatonin pills.

• mettamage 10y ago
  Isn't it also the case that after 3 days of taking it that your body will produce it less? Or is that not true?
  • fb03 10y ago
    That is certainly the case with almost all hormones and compounds that are produced endogenously when they are supplanted: Down Regulation. Always take the smallest dose of whatever you need to supplant in your body, for the effect you need to achieve :-)
  • r00fus 10y ago
    Doesn't that disagree with the study posted above? Or do you have other data?