Has anyone experienced increased hunger or difficulty making it through a 16-18 hour fast when they take MCT oil in the morning? I usually have 2T of MCT oil in my coffee as well as a scoop of vital protiens collagen. Today i decided to see if my hunger increased or decreased without adding those. Instead, i had a scoop of KetoVitals electrolyte powder before i drank my black coffee. Has anyone else experimented with this? I have been having a hard time not wanting to eat everything leading up to lunch time lately so i figured i could see if that is helping or not. I seem to have only really had about 2-3 waves of hunger and i just hit 18 hours on my fast & i feel like i could go longer. I figured I could add MCT oil and collagen to my day still, but maybe wait until my eating window to do so.
What do you guys think!?
MCT oil during fast making me more hungry?
I have done fasts for 4 days consuming MCT and pork fats and butter without anything else except espresso. I wasn’t hungry at all or low energy at 800-1000 fat calories. I could have used less but it was a personal experiment and worked out well. I will do it again. I recommend a good quality liquid MCT oil. I just add some to a mason jar with the coffee and shake it vigorously (good arm exercise!). Kills any hunger for me effectively. It’s odd that it makes you hungry, just looked at your profile so I see you’re a few months in now. 
@David_Stilley Thanks for the response! I can’t necessarily say it makes me more hungry i guess. maybe i need to try for a few days to see. I didn’t have a very filling dinner last night either (green smoothie) since i wasn’t super hungry to cook, so i’m surprised I wasn’t dying this morning.
You will probably get longer periods without hunger if you eat more nutritionally dense meals instead of a green shake. I mostly eat protein and fat with small amounts of vegetables like my homemade fermented stuff or some cooked Collards or kale that I grow. It keeps well and lasts a couple of years. I can just cut some leaves whenever I want vegetables. Sometimes I don’t eat any for several days.
Hi @egreener,
Here is my take on your post.
Why do we have appetizers? Because - to put it simply - eating makes us hungry.
If some of our ancestors killed something and got full after a few bites - they’d be removed from the gene pool.
Why do we have MCT coffee - supposedly to start fat burning mechanisms and add some clean fat calories - without the insulin spike.
That is great metabolically - unless it is acting as an appetizer - unless your body is saying “I know there are calories around - get them!”.
To me, butter / MCT coffee is a great mechanism to get more clean fat calories on maintenance (after goal weight) but, the same calories might be better spent on bacon and eggs (more satiating) while trying for weight loss.
@David_Stilley well it wasn’t necessarily non-nutritious. It had spinach, almond milk, strawberry, protien powder, chia seeds. But it was just enough to get something in my body without eating a big meal i wasn’t hungry for
@RobC good point! i’ll probably take a break from MCT and see how my body does without it
I didn’t mean to imply that, just that it’s very light food and won’t satiate you as long. And I misread I thought you were ravenous this morning. Sorry bout the confusion.
@David_Stilley oh no worries! yes, not hungry which was surprising 
yes, it was light but i was not hungry so i figured it was better than nothing before fasting till lunch the next day
I bought some Bean Envy MCT oil drink. It has fiber, collagen, sweeteners, and MCT oil. I can finally drink it without it hitting the back of my throat strangely. I just used the last scoop this morning. I’m going to not replace it, because I’m not sure it’s really doing anything for me. It was also pricey. Sometimes in the morning it’s all I have, and I haven’t noticed extra hunger. Just not sure it’s been useful.
Before I was adapted MCT oil made me ravenous, now it doesn’t. I wouldn’t have it if I were fasting though.
Same here, MCT oil in my coffee made me very hungry at first, but now that you mention it, that has stopped.
@Shortstuff how long did it take you to be adapted? And how did you know for sure? Also, I shouldn’t have it while I’m fasting? Or does it just depend on if it effects me or not
@Keto6468 I try to stay away from sweeteners when I’m fasting- but this is a good idea during my eating window! 
Depends WHY you’re fasting. If you want autophagy then avoid, but just fat loss you may be OK - it’s a very individual thing.
It took me months to get adapted but I had loads of stress at the time which dragged it out…
@Shortstuff Fasting for both reasons i guess! I think i’ll stick to having it during my eating window then. I have also heard recently that protein causes a blood sugar spike? So i should save the collagen for my eating window too & just have water, electrolytes & black coffee during fasting. Should i take MCT before a fasted workout?
This sounds backward to me. Fat burns when fasting, adding fat will give you energy if you are in a slump because body fat can’t produce enough caloric energy if you don’t have a lot of fat to access.
Autophagy is the recycling of protein and is driven by the absence of carbohydrates and protein. Fat metabolism aside. If you’re only consuming fat and no protein or carbs autophagy will be happening to supply your body’s need for protein and produce the needed glucose from those broken down protein aminos with gluconeogenesis to supply your glucose needs. Fat matabolism isn’t part of that equation. At least that’s how I understand it but I am open to a convincing counter explanation.
Not according to Jason Fung and numerous other very knowledgeable people who advise anything that has a calorie count (oils, and yes collagen too) should be avoided during fasting if the aim is autophagy and, with the greatest respect to you @David_Stilley, those are the people I choose to be guided by 
I have to agree with @Shortstuff - I do not think all of the research is in but, it seems to be the case that autophagy stopping might be based on nutrient sensing - any nutrient.
Agree with RobC and Allie, autophagy research I have read says mTor will be effected by nutrients.
I just don’t get the whole fast mimicking approach that some people are doing. Either you are fasting or you are eating, can’t be both ways. I can do water only for 24-36ish hrs. but not beyond that. I’m at slightly blow my goal weight, so that is fine by me.