An essential element that your body needs to function properly. Most vitamins come from nutritious food, although vitamin D is produced when your skin is exposed to sunlight.

A chemical that make you feel better. Different vitamins have different effects. Everybody need them to be happy and sometimes, productive, individuals.

vitamin C : A lot of americans get plenty of this vitamin thanks to the popularity of the delicious brew. Also named: caffeine, trimethylxanthine. If coffee is not enough you can have lot of them from No-Doz. Everybody know its effects and importance so i'm not gonna explain it all.

Vitamin A ("amphet") : Believe by many to be a stronger version of vit.C. Of course NOT! Important to be motivated, euphoric, energetic and not suffer from "sleep". Exist in different potency.
Chemical scientific name: All amphetamine analogs especially methamphetamine. Some weaker or less useful substitutes are methylphenidate, methcathinone, etc.
Rich people buy the "rich man's amphetamine" known as coke.

vitamin O ("opioids"): Make you feel relaxed, happy and content about everything. The brain doesn't make enough of its natural vitamin O ("endorphins"). That's why you need supplements. It is not actually "a chemical" but a group of chemical. Some of them are more "concentrated".
(from weak to strong): Codeine (tylenol 3's), DHC, hydrocodone (vics), oxycodone (percs), methadone, morphine (MS contin), heroin (smack), fentanyl (China White).

vitamin K: Also known as "horse tranquilizer" it is also very healthy for humans. When the body is...