I had been trying to get into ketosis for about a month eatign very little protein, taking olive oil and coconut oil and almost no carbs but was only able to get into very light ketosis when testing with a stick. My energy was also very low aswell.
So I had gotten some heavy whipping cream from the store just to try it. I drank about 25% of it and omg let me tell you. I was like.... Instantly put into the most intense ketosis. The ketostick was super dark purple and I felt so clear headed and energetic.. It was crazy. 24 hours later I noticed my face was thinning out and complexion got so much better and I jumped on the scale and already had lost nearly 3 pounds. Also my stomach went super acidic like it was like desperately try to digest what I just put into it.
This is what I would have expected from coconut oil not heavy whipping cream?. Does anyone have any idea why this is?. Olive Oil would just make me more sick than anything..
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Dairy is highly insulinogenic which may give temporarily good results but it's harmful in the long term.
Most fat sources (eg, vegetable oil) contain mainly long-chain triglycerides, which must be packaged into chylomicrons, after which they go through a complicated musical chairs, passing among VLDL, IDL, LDL, HDL, etc... before finally arriving at a target tissue, where they may not even be metabolized (ie, no ketones).
Coconut oil is considered "ketogenic" because it contains a large amount of medium-chain triglycerides, which are absorbed and sent straight to the liver, without going through the chylomicron system, to be metabolized into ketones.
Butyric acid, which @james-3 mentions, is a short-chain triglyceride. If it is indeed abundant in cream, it would explain your experience because short-chain triglycerides follow the same pattern that medium-chain triglycerides do.
The most likely scenario (because all of those things are just pure fat) is that you tried cream after some days of trying oil. It probably just took you that long to get into ketosis.
Either way, what I think you're doing is stupid but my opinion doesn't matter cause I'm just some random kid on the internet.
At a total guess, butyric acid (relatively high in heavy cream). How are you with butter/ghee?
I don't know about the ketosis part, but a good amount of heavy cream makes me feel euphoric as well...I searched it a while back and did not come up with much. Perhaps it's due to the casomorphins also present in cheese which produce an opiate-like effect. But it's also been said that cream doesn't contain much casomorphins.
Your results don't sound typical, to be honest. Whatever the reason, good for you!