If you have been doing keto for a while I’m sure you’ve heard the inevitable question, “yeah, but what if you eat too much fat?” In other words, we know if we don’t burn glucose it converts to fat that is stored in our body. By eating low carbs, the thinking goes, our body is forced to burn stored fat thus allowing us to lose weight, keep insulin levels down and, in general, improve our health. That is all fine as long as we are burning more calories than we are consuming. The burning question is, even if we adhere strictly to a low carb diet, what happens to fat that is not burned, if we are consuming more fat than we are burning? We know excess carbs covert to glucose that becomes fat and is stored in our body. But what happens or what is the process and how does it differ from excess carbs when we eat excess fat? Yes, excess protein can lead to gluconeogenesis but what happens when we eat too much fat, consume more fat than we are burning? How do the processes differ in our body?
Keto: The Burning Question
It gets stored as fat, of course 
Just because we’re keto doesn’t mean we can eat unlimited calories.
In excessive quantities, it can also go all the way through and out the other end.
I’m sure you’re right - though I wonder how much it would actually take… Any volunteers to study this?!? 
So, in other words, step one is to always burn more than we are consuming. If we don’t do that, regardless of the % of macros we are consuming, we gain weight. The plus is, one could argue, if we are following a keto diet, we do not get insulin spikes and the inflammation this creates.
I don’t think this is ever the case with fat. I have heard our bodies can only use so much protein, the rest being urinated from the body, but I have never heard this regarding carbs or fats. Hell, if excessive quantities of fat simply passed through our system ice cream sales would be a lot higher. “Eat all you want.”
I think he (or she) was referring to something similar to the dumping syndrome that the bariatric surgery patients get; if they eat too much or too much of the wrong thing after the gastric bypass, they literally just pass it all out of their system very quickly (if you know what I mean).
Do they still make Alli? Wasn’t that a pill that made you poo out all of your fat? One of the “side effects” is spotting in undergarments if you pass gas. Fun stuff 
When I started Keto, all it took was 2 T of MCT to prove that nearly instant in-and-out hypothesis!
Dr. Lustig, a professor at UCSF, and presenter of Sugar:The Bitter Truth, did a great job showing exactly how the body broke down sugar and high fructose corn syrup. He showed how what you ate had a huge impact on how your body was impacted. Has anyone seen a similar presentation on how our bodies process fats vs carbs vs proteins?
Except for the sugar issue! I seem to be able to eat all the fat I care too with no noticable weight gain. I’m 8 months in and have yet to count fat or protein macros.
That’s awesome. Continued success.
I have done both, counted and not counted. More often than not I don’t count but for me I have found that if I am serious about losing some weight I am more effective when I count calories and record it daily. So I painstakingly count. For now.
There’s a Keto saying:
Calories count. Just don’t count them.
Or something like that.
I have to agree with this sentiment. I think calories are a measurement whose numbers mean little in real life. But that is my opinion. I could be wrong. I worry more about not getting enough calories to keep my body from slowing it’s metabolism down because I’m not a big eater. It was never how much I was eating but the type of foods I was eating. I love sugar! I don’t crave it like I did but I still enjoy it and I know if I go back to eating the types of foods that got me fat in the first place I’ll gain it all back.
You know, though, I think MCT oil is treated differently by your digestive system. It has the same effect on me. I’ve had to simmer down on the MCT oil for that reason; but I can eat/drink half a carton of heavy whipping cream, span, bacon, etc. without any issues. But yeah, MCT oil gets me every time - ESPECIALLY mixed into coffee
Before starting Keto [mostly low carb at the time], whenever I had a day that I ate ‘too much fat’ I think my metabolism kicked it up a notch because I would get a result like a hot flash for the better part of the day, and it was difficult to rest–get to sleep. Is it possible that your body just adapts and accommodates the relatively low/high amount of fat you are eating for the day? If you are fat adapted, I would guess [since I’m trying to get there] that your body is just shifting metabolism gears up or down to regulate the use of available fuel.?