Ultimately I learned that calorie counting (energy accounting) is necessary for control of an entity whether it be a business or a human body. So this means a calorie deficit ultimately determines if a person is going to lose or gain weight (growth vs loss).
And if a person is in a deficit then any calories they consume is being burned away from their activity. So in that state a person is going to typically feel low on energy and that is when in my experience a teaspoon or tablespoon of MCT oil can provide a nice pre-workout energy boost.
Other than that I cannot say it's something I use on a regular basis. It's the sort of thing to use right before working out so you can know you can get through the workout or right after you worked out so you can aid in recovery from a long cardio session if you're trying to preserve muscle.
There has been research showing that caloric restiction has anti-aging benefits, although a well established and controlled diet is required due to risks.
I personally fast in the morning, and will break fast with coffee or Caffè Americano with heavy cream and a teaspoon of dried MCT (coconut milk powder). The caffeine and MCT provide my both a physical and mental boost for my day, and if I don't follow my routine, it's missed.
I don't run a large caloric deficit, my dietary goal is not weight loss. I am looking for a complete diet with low carbs, high fat, and moderate protein. I have a high stress, high energy life, this is what works best for me.
Again, thank you for the great post, you consistently post great content.