Today is the end of my diet experiment. It has been 37 days since I started and I'm sad to say that I haven't noticed any change in my oil output.
To recap, I eliminated all grains, all dairy, almost all processed food, artificial sugar, and peanut butter. I was also shooting for low fat and moderate carbs. My diet literally consisted of almost the same things every day: two smoothies (sunflower butter, banana, blueberries, spinach), various fruit throughout the day, and either a stir-fry with chicken and vegetables or scrambled eggs when I didn't have ingredients for the stir-fry.
As a result of my limited food options, I naturally consumed fewer calories, so I was simultaneously testing the theory that caloric restriction reduces sebum secretion. My daily caloric intake was about 1300 calories during this experiment, roughly half of what I consume on my normal diet. I've lost nearly 15 pounds in the past 37 days, but I fully intend to gain all of it back.
This was definitely the most grueling experiment I have done yet. I was hungry pretty much all the time, and it was especially painful when I was put into situations where I was surrounded by delicious food that I couldn't eat. The experiment seriously felt twice as long as it was. But I stuck with it 100% because that's how badly I want to find a solution for oily skin.
In a way I'm a little glad that I didn't see any improvement from this diet experiment, because it means I get to eat what I usually eat without feeling like it may be contributing to oily skin. On the other hand, it means the search for an oily skin cure continues.