Re: brain freeze,

these are supplement with trials and evidence which prove they improve cognitive funciton. i am not going to give any links, you can google them if you are interested.

DHA, from fish and fish oil.

Phosphatidylserine, increases memory.

Lecithin, a big portion of the brain is made of lecithin

amino acids, the raw material to build neurotransmitters

all b vitamins, especially B12 and B6

vinpocetine, shown to improve memory

huperzine A, shown to improve memory

acetyl l carnitine, helps metabolize fat which is what the brain burns for energy

rosemary, protects and nourishes nerves

vitamins C and E

healthy fats are really the key here, flax oil, hemp oil, coconut, high quality fish oil (dont get the cheap stuff), raw butter, eggs, all will help.