Ibuprofin, an anti-inflammatory. Used to such a great extent by many athletes that it can be considered to have a DRI of 400-800 mg much like a real vitamin.
Oh man, my shins are killing me, time to pop some vitamin I.
Ibuprofen, a non opiate, non steroidal, anti-inflammatory drug
After the surgery they gave me a prescription for Vitamin I, but it was for a higher dose than is available over the counter.
A subtle word (often used as a code word) to describe one or more attractive persons in a place, surrounding, or area.
*At a party* (person 1): "is there any 'vitamin I' around here?"
(person 2): "Only one source of vitamin I. He's standing by the door... Blonde hair, blue eyes, Irish..."
This vitamin probably exists somewhere in the real world, but for now it can mean "heals all heartbreak" or something wonderfully tragic like that.
You got your heart broken? Try some vitamin i. It helps. Sometimes.