College basketball fans know Spring is all about March Madness, but at IIN, we're dedicating March to a different craze: Smoothies!

In honor of our obsession, we've put together a Perfect Smoothie Bracket Challenge. But that's not even the best part - YOU get to vote!

Here's how it works:

Every Monday and Thursday, we'll put popular smoothie ingredients head-to-head and let you vote for your favorites. We'll work our way into the center of the bracket, which has four sections: Bases, Add-ins, Vegetables, and Fruits. Once we have a winner from each section, we should have the perfect four-ingredient smoothie! 

Here's our starting bracket! 

Each round of voting will stay open for 48 hours, so share with all your friends quickly! And here's your first series of smoothie ingredient face-offs - make sure to vote in all four!