(Last Updated April 8, 2016) –There’s a new trend going around that may forever change the way you drink coffee. Instead of the usual cream and sugar, many people are now adding butter to their coffee and it’s just about the greatest thing ever.

To most people, putting butter in their coffee sounds skeptical if not borderline dangerous, but not all butters are bad for you. In this case, there is only one kind of butter you should put in your coffee: grass-fed butter. Kerrygold unsalted brand is probably the most common that you can find in stores. But why grass-fed butter?

Most cows are corn or soy fed. It’s cheap and filling, but cows aren’t actually meant to eat that- they can’t even digest it properly- and their milk produces the kinds of fats you don’t want in your body. Grass-fed cows on the other hand commonly produce the best milk and beef, and the butter made from those cows is just as good. Here are five reasons why you should be putting this kind of butter in your coffee (and just using it in general from now on):

1. Only grass-fed butter has the right fats that regulate cholesterol, not add to it. Grass-fed butter has the best ratio of omega-6 to omega-3 fatty acids (which reduces body fat) and is a good source of vitamin K, both of which according to a studies reduce the risk of heart disease.

2. It provides healthy fats for your brain and body to create cell walls (membranes) and hormones. The short-chain fatty acid Butyrate, once thought to be bad for you, has been linked to preventing neurodegenerative diseases, increased energy expenditure, and is also anti-inflammatory, further preventing heart disease.

3. Drinking it each morning puts your body in the routine to burn fat all day, helping you trim down overall. CLA (conjugated linoleic acid), found in grass-fed butter, has been shown to reduce body fat mass especially in overweight individuals.

4. “Bulletproof” coffee will give you energy as well as increase cognitive function that you can literally feel when it kicks in for about six hours- and without the crash. Mixed with more healthy fats from coconut oil, this amped up drink will help produce ketones, which are created when your body creates energy from fat rather than carbohydrates.

5. Two tablespoons of butter in your coffee is all you need to replace a breakfast meal altogether, making this a quick alternative for people on the go. Providing your body with essential fats and calories is a higher performance blend than a carbohydrate source like oatmeal.

When you blend it with coffee, what you get is the most pleasantly creamy drink that you can actually feel energizing your body. But why stop there? If you are going to put the best butter in your coffee, you should have the best of everything.

According to bio-hacker and entrepreneur Dave Asprey, who formulated this popular blend, the quality of your coffee beans can make a noticeable difference and adding XCT oil will absolutely boost your brain’s focus in the morning. If your coffee isn’t doing it for you anymore, this is one recipe you’ll want to try. Bulletproof offers a coffee kit to get started if you’re interested.

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