I have a certificate in plant-based nutrition through eCornell and the T. Colin Campbell Foundation. I am very interested in nutrition and am a big believer in a mostly plant-based diet. I look forward to increasing my knowledge further as time goes by! :)
Well, you are at the right place!! An apple and oatmeal are all you're eating all day?
Check out my green smoothie post. The link is in my signature. It has a compilation of simple, basic tips for acne from a variety of sources that will help get you started. If these don't work out for you, your issue may be more complex, and you will need to investigate further....there are links in my signature for Alternativista's information. She knows a ton more than I do, and she's not afraid to dig deep to find the source!
I think if you keep Vitamin D under 400 IU (not mg) /day, you're okay. What about vitamin A? Are you getting sufficient amounts of beta-carotene in your diet so your body can make vitamin A? It's essential for clear skin!
Unfortunately, destroying gut flora is a walk in the park compared to what antibiotics can really do. Take the Quinolone family of antibiotics, such as Cipro (originally made for cancer patients or people with "very" bad infections but is now handed out like candy...)...it's being linked to fibromyalgia, chronic fatigue syndrome, mental disorders, etc... I wouldn't touch a man-made antiobiotic, except for maybe a "very" old-school one, like penicillin.
My top suggestions would be to look into:
Oregano oil (topically, and diluted, of course).
You will need to research to get the specific doses/recommendations.
You might also look into:
Olive Leaf Extract
And, I would suggest supplementing with acidophilus if you suspect your healthy gut flora is low. Also, are you eating a nutrient-rich diet? That is vital. Lots of greens and cruciferous veggies (if that sounds difficult, see my green smoothie thread).
Edit: Alex, you mentioned having UTIs. You might look into doing a kidney cleanse if you find they keep returning.
For those talking about staph, oregano oil can kill staph infections that antibiotics can't touch...I know 2 people that had oregano work for them when antibiotics didn't. Cool stuff:)