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Regain an Agile Brain • 169

Supra Chiasmatic
Nucleus Hypothalamus

Pineal
Gland
Light

Retina

Optic Nerve

Signals
to body

Figure 6-3 Pineal gland

fit from melatonin supplements as well. If the trouble is
going to sleep, but once you fall asleep you can stay asleep,
some physicians recommend fast-release melatonin sup-
plements. If you have trouble staying asleep, a controlled-
release form of melatonin may help. It may take several
days to a week before you see an improvement and begin
to reinstate your natural cycle. These supplements are
7
somewhat controversial, and you should not take them
without your physician’s approval because of possible
drug interactions and questionable quality control of many
over-the-counter supplements.