The pineal gland converts amino acids from food and converts them into tryptophan, then 5-hydroxy-tryptophan, then serotonin, then melatonin.

After we're three months old, we can do this, before that we need breastmilk for melatonin.

But, natural production drops steeply at 30 and we have little, to none, when we're 60.

Quote Originally Posted by minnesota man

Movie reccomendation: "Altered States"
LOL, I saw that in 1993, late one night, at college. I was heading to bed and stopped in the lounge. Saw that movie and, I swear, I was tripping when I went back to my room.