It's the fat-fattiest time of the year.

So a group of medical students at the University of Ottawa has launched a healthy eating campaign called #Snacks4Santa to encourage people to make more nutritious snacks during the holiday season.

This holiday season I am excited to leave Santa something healthy! <a href="https://twitter.com/hashtag/snacks4santa?src=hash">#snacks4santa</a> —@Snacks4Santa

The social media campaign targets obesity in children and their parents. It challenges them to:

Make a healthy holiday snack involving two or more of the four main food groups.

Take a photo of the snack.

Share the photo on Facebook, Instagram or Twitter using the hashtag #Snacks4Santa.

Tag their family and friends to spread the word.

Organizer Sadaf Arbab-Tafti says their message is about moderation.

"I don't think it's the idea that you can't have cake and cookies. I think that's totally allowed during the holidays and even on a day to day bases. I think it's the idea that, why is it that we have to leave cookies for Santa? Why can't it be a healthy snack that we make together as a family?" she asked.

Arbab-Taft says they're trying to change the idea that Santa should have a belly that shakes like a "bowl full of jelly."

"We thought this could actually happen for the holidays because honestly it would be targeting kids. It's at a young age. You're putting out healthy snacks let's say for someone like Santa, who is a role model. It probably makes an impact when you're growing up as to the choices you're making."

The students tweeted these examples.

Check out this healthy chicken and vegetable Christmas tree with a glass of unsweetened almond milk. <a href="https://twitter.com/hashtag/Snacks4Santa?src=hash">#Snacks4Santa</a> <a href="https://t.co/C4w0y65oOK">pic.twitter.com/C4w0y65oOK</a> —@Snacks4Santa

Proper nutrition gives you energy for activities (like flying around the world delivering presents) <a href="https://twitter.com/hashtag/Snacks4Santa?src=hash">#Snacks4Santa</a>. <a href="https://t.co/ds7zUUIowH">pic.twitter.com/ds7zUUIowH</a> —@Snacks4Santa

When planning a snack for Santa, try and pick from 2 of the 4 food groups to maximize the nutrition. <a href="https://twitter.com/hashtag/Snacks4Santa?src=hash">#Snacks4Santa</a> <a href="https://t.co/LU2nGG9vpE">pic.twitter.com/LU2nGG9vpE</a> —@Snacks4Santa

Keeping it health this holiday season! <a href="https://twitter.com/hashtag/Snacks4Santa?src=hash">#Snacks4Santa</a> <a href="https://t.co/92hNUENtkX">pic.twitter.com/92hNUENtkX</a> —@RobertFrancesc3

Snack Happy! Snack Healthy! <a href="https://twitter.com/hashtag/Snacks4Santa?src=hash">#Snacks4Santa</a> <a href="https://t.co/IIrfJ1KGX5">pic.twitter.com/IIrfJ1KGX5</a> —@Snacks4Santa

This year, leave Santa something healthy! <a href="https://twitter.com/hashtag/Snacks4Santa?src=hash">#Snacks4Santa</a> <a href="https://t.co/EYsbIBgSiL">pic.twitter.com/EYsbIBgSiL</a> —@Snacks4Santa

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