* melatonin inhibits the formation of plaques and may be effective in the prevention of [[Alzheimer's Disease]]; however, melatonin, cannot reverse the formation of existing plaques, so is not useful in the treatment of the disease<br><br>
Below are lists containing natural plant sources of melatonin. Melatonin content is in nanogram (ng) per gram of plant sample.</pbr><br>
<p>Table 1: Melatonin sources ( Rieter and Tan, 2002).</p>
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<p>Table 2: Melatonin sources (Hardeland and Pandi-Perumal, 2005).</p>