I Tested Popular Functional Coffee Add-Ins for a Week Each (2026)

City: I tested eight popular coffee add-ins for a week each to see how they work. First, I noticed that many people are adding protein to coffee creamers. I love coffee, so I was curious about these trends.

These add-ins are more popular now because of health trends and the rise of wellness culture. Some people say that due to stress, folks want to boost their health with different products. It feels like we are on a ship that is sinking, and we want to keep our health as best as we can.

While protein is popular, there are other things people add to coffee, like mushrooms, amino acids, and nootropics. These add-ins might help us feel better and work better. Adding things to coffee is a big trend, and I wanted to see what really works.

I carefully tested eight add-ins that are easy to find. I used the amount suggested on the package in my coffee every day for a week. I brewed my coffee from Guatemalan beans, making sure it was just right. My goal was to find out which add-ins are great and which ones aren’t worth it.

Be sure to check out other helpful guides about coffee, like the best coffee makers and subscriptions!