Diet and Supplements

I may or may not have mentioned my diet and supplements I'm taking and that's because I haven't made any changes. This may be important to note. Almost every blog that I read has people who have made changes to their diet or are on a gluten- no sugar etc kick. They all take some sort of vitamin with some taking more then 3 supplements and having strict regimens for their skin. And you know what I notice? Nothing. Everyone is still suffering.

I in general, try to eat healthy. I consider myself healthier than the average American, I eat some type of fruit everyday...lol Seriously though, I don't eat fast food, or drink soda except on special occasions. I don't drink alcohol. My weakness however....is cookies. There was a week straight where I had four cookies a night, with a big glass of skim milk and that was that! Did that hurt or help my skin? Can't say, but what I do know is I will always chose a cookie and a glass of milk over a banana when I get home after work. 

Why no vitamins?  Well, the main reason is that it's  expensive. I can barley afford to buy skin requirements as it is. (Gauze etc.) Another reason is that I have taken them in the past and never noticed any difference in mood, skin or health. I know I should take them but I still haven't.

What do you guys say?
Is diet a deal breaker? Are you on one?
Are there any vitamins you insist I should be taking? Where is a good place to buy them?
Which ones are you taking?