(CBS) -- Putting butter in your coffee sounds weird, but it is a popular trend.
Drinkers say it keeps them feeling full, keeps their minds sharp and even helps them lose weight. Should we all be giving it a try? CBS 2's Roseanne Tellez checked it out.
Jim Kolbusz starts his day with it.
"I will drink it as breakfast," said Kolbusz.
Personal trainer Jill Rodriguez says it's delicious.
"I love it," said Rodriguez. "My clients say the same thing."
Andrea Baumann is becoming a fan too.
"I'm always trying something new," said Baumann.
That new something is buttered coffee. It's a cup of brewed coffee with two tablespoons of unsalted, grass-fed butter added to it, then, a tablespoon of coconut oil or MCT oil which comes from coconut oil.
You blend it all up and the result is a creamy frothy hot drink that supporters say comes with a slew of benefits.
"It completely satisfied hunger," said Jim Kolbusz. "I am alert. I never feel tired or walking around like a zombie."
A buttered coffee can easily have 330 calories and 29 grams of saturated fat, but supporters like dietitian Cassie Bjork says the fatty acids in grass-fed butter can help rev up our metabolisms.
"I wouldn't really focus on the 3 or 400 calories in a cup, I think it's just good healthy fat that helps us utilize energy," said Bjork.
Sports nutritionist Dr. Liz Applegate says watch out.
"For most of us desk jockeys who are not working out it's really not something we can afford to do," said Applegate.
Jim Kolbusz does get plenty of exercise and he's careful about eating unprocessed food and lots of protein. He's been drinking buttered coffee for four months, but he's still lost seven pounds.
"My body fat reduced from 12 percent to eight percent," said Kolbusz.
But the buttered coffee trend has the medical community concerned. While grass fed butter does have some healthier fats, it still carries a load of saturated fat.
"There is not a lot of evidence that it's good for you and it's probably bad for you," said Dr. Kannan Mutharasan. "I would not recommend it for anyone. There isn't anyone I would recommend it to. If someone wanted to try it, one cup won't hurt."
Healthy or not, Mike Wright at the ugly mug cafe says it's selling.
"The response has been phenomenal," said Wright. "New customers are coming in just to try it."
Coffee drinkers we spoke with just see buttered coffee as a treat.
Butter coffee lovers say the fat in the butter is what helps them feel full and it also helps spread out the impact of the caffeine so you feel alert longer.
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