Hunter S Thompson said he met someone who tried to give him pineal gland as a drug.

http://www.columbia.edu/ ~ey2172/thompson.html

They say the brain looks like a walnut. (Walnut sauce?)

Actual walnuts enhance the melatonin in your pineal gland

http://www.livestrong.com/article/548409-sleep-promoting-ingredients-in-walnuts/

Pineal gland is considered your third eye. Illuminati eye perhaps?

http://www.walnutbrainacademy.com/Scientific_Theory.html

They also add fluoride in water sources which is said to decay or degrade the pineal gland.

http://be.well.org/the-dangers-of-fluoride-and-how-to-decalcify-your-pineal-gland/

rule 1: this is a sub for direct investigation of pizzagate, not speculative theories.