polyfractal says it best with [<a href="http://news.ycombinator.com/item?id=4893197" rel="nofollow">http://news.ycombinator.com/item?id=4893197</a>].<p>I would like to add some things.<p>The oil produced very much depends on diet, and your body's own ability to combat the growth of extraneous bacteria (There is lots of bacteria in your body that is <i>GOOD</i> for you).<p>For what it's worth, your body's immune system uses Vitamin D, and the best way to help that? Get Outside! You'll notice that surfers and active beachgoers tend to have clear skin more often than not.<p>Lots of water is just too important to not reiterate. Try to shoot for one glass of water every hour. Want a helpful reminder? Set your own calendar alerts on your phone.<p>Be careful of causing frequent insulin spikes. Fruits, Starches, Sugars, Grains, and Dairy are all stronger insulinotropics (produce a high response in release of insulin) than vegetables, healthy fats, and meats. Having more leafy vegetables and healthy fats (Omega 3s, 100% Grass-fed (Grass-finished) red meats and even grass-fed butter) will flatten out that response to insulin. (You may lose weight by flattening out this insulin level as well).<p>Essentially, everything is a hormonal response. At the end of the day, once you improve what's inside, your outsides will vastly improve as well.<p>With that said, there isn't hope lost once you do have the acne occur. You can use [egg white + coffee] face masks (homemade recipes can easily be found), and spot treatment Benzoyl Peroxide. However I wouldn't recommend doing daily Benzoyl Treatments (Proactive) without making sure you follow the system to the 'T'. The moisturizers are essential and basically required. If you don't use them as provided then you won't fix the acne.<p>You can also just use Murad's Redness Therapy if the acne is red but not ready to surface [<a href="http://www.sephora.com/redness-therapy-correcting-moisturizer-spf-15-P72003" rel="nofollow">http://www.sephora.com/redness-therapy-correcting-moisturize...</a>] Although I recommend the lotion version, not the cleanser version.<p>You can also use straight up brewed coffee. Rubbing your skin with coffee grinds (as recommend by some places) can scratch your skin, but taking a paper towel and dipping it in hot coffee, and letting that rest on your face for a few minutes will open up the pores and let the caffeine absorb through your skin. Caffeine provides many things, will make your skin more vibrant, but most importantly it is a vasoconstrictor (tightens capillaries that may by causing redness). It even helps fight some of the mold/toxins (The higher the caffeine content of the coffee, for instance, the easier it is for the bean itself to fight off mold before it is roasted).<p>If you want to have more life-changing information, just keep reading! Four Hour Body by Tim Ferriss is a great step, but his writing is really only a stepping stone. For the next step of reading I really recommend Dave Asprey's Bulletproof Executive. Check his stuff out at BulletProofExec.com.