A trend - or a fad- of the time is to put butter in coffee to make an "upgraded" version (also known as Bulletproof Coffee), saying that this coffee contains antioxidants, good cholesterol, vitamin K2 and omega-3 fatty acids, contributing to good brain function, strength and immune system, and there are many who release their own versions of this "upgraded" coffee.
Although, in my opinion, this coffee is just a fad and I don't believe that can do to you more good than a simple coffee with heavy cream or coconut oil, I can say that I like its taste, as it tastes like a butter candy.
One of the Bulletproof coffee's promotional videos. Also, don't forget to read a gizmodo's article about the "Biohacker", the creator of this coffee .
In a recent study, they found that the consumption of butter coffee had an increase in both total cholesterol values to as high as 33%, but also an increase in LDL (or "bad") cholesterol levels up to 49% , which has the effect of increasing the risk of heart disease.
However, this coffee increased and the HDL (aka "good") cholesterol, while strangely enough it lowered the triglycerides in the blood, as you can see in the table below.
How to make an alternative Bulletproof Coffee
To make your own butter free version of "Bulletproof Coffee", it's very simple. Make a coffee as you usually make it and put 1-2 tablespoons of coconut oil or coconut milk (full, without sugar or other sweeteners). Coconut milk (more cheap than Coconut oil) can be found in supermarkets, but better buy the oil, as you can also use it in cooking. You can add and 1-2 tablespoons of heavy cream.
Fat from coconut oil or coconut milk is not the same as from meat or dairy. These are called Medium chain triglycerides (MCTs, although recently are called fatty acids because the word triglycerides was terrifying to people) and have the ability to be absorbed directly by the body to provide energy when there is no other source available (like when someone is on a diet) . These fats also can help to burn fat and lose weight , while they may have and other good benefits for the body [5, 6].