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Re:How to Be Persuasive by coglethorpe on Sunday May 17, 2009 @10:23PM (#614244)
"Group A drank regular orange juice, group B drank orange juice infused with caffeine."

Want this.

Re:How to Be Persuasive by jerf on Sunday May 17, 2009 @11:49PM (#614348)
At the risk of killing you, http://www.aonevitamins.com/caffeine.htm , which is simply the first hit for "caffiene powder". It's not exactly a tricky recipe.
Re:How to Be Persuasive by spydez on Monday May 18, 2009 @10:37AM (#615032)
United Nuclear has it cheaper. http://www.unitednuclear.com/chem.htm

Just, yeah. Don't kill yourself. :P Lethal dose is somewhere between 10 and 20 grams. Rough, spydez-levels of caffeination call for ~1/2 teaspoon of pure caffeine powder per gallon of water or juice or tea or what have you.

Enjoy.

Or, for extra credit, make a caffeinated heavy water ice cube.