Caffeine (a naturally occurring xanthine derivative with central nervous system (CNS) stimulating activity)
Glucose (a type of sugar; the chief source of energy for living organisms)
glucuronolactone, the naturally occurring chemical compound produced by the metabolism of glucose in the human liver with the chemical formula C6H8O6
Hydrogen, the chemical element H that has atomic number 1 in the periodic table and which makes up roughly 75% of all baryonic mass in the universe
Nicotinic acid (the active form of vitamin B3 and a component of the coenzyme nicotinamide adenine dinucleotide (NAD))
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