Eating coconut oil does not cause acne, as far as I'm concerned. But applying coconut oil to your skin MAY cause an acne breakout. Why? Our skin is a good place to store toxins since it is large and it's one of the organs that our body uses to help expel toxins. But the problem is, when you consume toxin-laden food particularly animal proteins every single day, the toxins may be too much for your skin cells to handle and so instead of expelling toxins, your skin becomes a warehouse for toxins over the years.
That explains why meat-eaters tend to have dull skin and age faster. It all thanks to the toxins passed on to them by the animals.
After many years of storing toxins, when you start putting coconut oil on your skin, as coconut oil has potent anti-toxin property, it will draw toxins up to the surface of your skin. And if your skin tends to shed dead cells abnormally, the pores can easily get clogged. Purging of toxins by coconut oil will, at this juncture, trigger an acne breakout.
But don't get it wrong, such "acne" caused by using coconut oil is actually a detox reaction. That usually happens to people who topically use coconut oil only.
Eating coconut oil, on the other hand, helps to reduce the breakout because coconut oil will bring into effect its anti-toxin capability inside your body by expelling toxins via an increase of bowel movements. This can help to tremendously reduce the deposits of toxins in your skin that in turn, cut down on the chances of breakout.
Speaking of eating coconut oil, you must understand that an acne flare is actually telling you that your liver has some sort of problem because one of the liver functions is to help regulate the secretion of sebum. When your sebum secretes excessively that makes your skin super oily and hence, acne-prone, it means your liver is not doing good.
Consuming coconut oil can help to strengthen your liver function and thus, make your skin less oily and acne-prone.
However, it's not enough to clear your acne by eating coconut oil. Topical application is still necessary because coconut oil can also help to lower the count of acne bacteria in your skin because it has anti-bacterial property too.
In conclusion, eating coconut oil should not cause acne. Eating coconut oil helps with your acne problem instead. But do remember not to eat too much coconut oil like 2 or more tablespoons at one shot when you're getting started because too much coconut oil can trigger diarrhea-like symptoms due to its very strong detox property.
It's best to spread the doses over your meals so that not only it won't give you the runs (even if it does it won't be too severe) but can also help to improve your acne.