I had really bad acne all over my face and neck with the random appearance on my chest, back, or shoulders constantly for 14 years (starting at puberty), and as time went on it only got worse (so it wasn't caused by changes in hormones as I was led to believe). I stumbled upon some information on Diatomaceous Earth (DE) and became intrigued because of its many proported benefits (I recommend looking it up). It is relatively unknown, and only sold for pest control and consumption by animals, (but you can buy food grade DE online) but since it is used to mechanically kill bugs in grain silos and just about every person who has ever eaten grain which was stored in a silo has eaten DE, I figured it would be safe and I would try it. DE is the fossilized shells of a type of algae called Diatoms. Their shells are extremely hard and very sharp (but yet not dangerous to your cells) and they mechanically scrub the walls of your intestines, scraping away any build-up. Some DE passes through the intestinal walls and into the bloodstream and while it is there it scrapes plaque buildup away from the walls of veins and arteries. It basicly acts like a plumber in your body.
I found that most cases of acne are caused by toxins entering the blood stream through the digestive system (some degree of leaky gut), not by a problem with the skin itself. It is your body attempting to expel the toxins from your blood. When you expel the toxins which originate in your digestive tract through the digestive system, they don't have the opportunity to make it into your blood stream and thus cause acne by pushing through your skin. So... I began adding 1tsp DE to water every day for a week, then increased it to 1tbsp gradually after that and drank it daily for 2 months. I noticed a difference my skin within a day. By the time 2 months was up I no longer had acne. I had to stop consuming it for a little while after that because I slightly threw my body off balance (my skin became a little dry). After a month off, I started consuming it again in moderation and have been ever since. I have been able to consistently keep the acne away as long as I continue to consume it at least a couple of times a week. I highly reccomend it because it is very effective and it gets to the root of the problem instead of just treating the symptoms. I now have had only a few pimples (instead of many hundreds) within the last 9 months, and I know that in time I will get them to go away completely.