Skip to content

What Happens To Your Body When You Eat Cereal Every Day

It may not be the healthy breakfast option you thought it was.

Breakfast can make or break your day. Eating the right foods in the morning can make you feel energized and motivated, while the wrong options can leave you tired and starving for your next meal.

Cereal, though convenient and easy to prepare, unfortunately falls into the latter category. According to the South Florida Reporter, the average American eats 160 bowls of cereal per year—that's a whole lot of unhealthy breakfasts. Many of us grew up eating cereal every morning and have just continued this easy breakfast habit into adulthood, but now's the time to make a switch. A healthier breakfast replacement we suggest is oatmeal, packed with endless nutritional benefits.

If you need more convincing on the negative effects of cereal to your body, here are some of the adverse effects you may be suffering after you finish your daily bowl.

For more, check out 21 Best Healthy Cooking Hacks of All Time.


Your blood sugar levels will rise, followed by a crash

unhealthy cereal

When was the last time you took a long hard look at your cereal box? According to Healthline, sugar is usually the second or third ingredient listed on the nutrition panel of your favorite flakes. That's not a good sign. Filling your body with all that sweet stuff first thing in the morning will cause your blood sugar levels to spike and then crash very soon after. If you're wondering why you immediately feel hungry or tired after breakfast, there's your answer.

Don't forget to sign up for our newsletter to get the latest food and nutrition news delivered straight to your inbox.


You'll feel full (if you choose the right cereal)

bran flakes

Even though cereal isn't the best breakfast option, there are a few options that'll leave you feeling full. If you are going to stick with cereal you have to make sure it's packed with fiber and protein (the two things that give it value and ultimately make you feel satiated). Bran, which contains 4 grams of protein and 7 grams of dietary fiber in one serving, is a good option. Most other cereal brands, though, will leave your stomach grumbling because they're lacking those crucial macronutrients.


You're likely eating more than the correct serving size


You'd probably be shocked to know that when it comes to cereal, filling up your bowl is not the answer. Consumer Reports found that most cereal eaters who completed their survey were surprised by how small a recommended serving actually is. And did you know the cereal serving size changes depending on the type of cereal you have? Odds are, if you actually follow the suggested serving size on the box, your bowl will leave you hungry for more, which is why you're likely to eat more than just one serving.


You'll soon crave another high-carb meal

eating cereal

Due to the amount of sugar and carbs packed into your daily serving of processed cereal, you'll probably crave another meal with the same high amount of carbs just a few hours later. Given the fact that cereal lacks many of the important nutrients responsible for keeping you full, like protein and fiber, you'll be looking for your next meal or snack in no time. This can often lead to overeating and constant snacking, two incredibly unhealthy eating habits.


You could get a cavity or tooth decay

froot loops
Haley Owens/ Unsplash

We all know that sugar leads to bad oral health, but we may not be thinking about it in terms of our cereal. Especially when eating cereal without milk, all that sugar and the sticky nature of the food itself, can easily affect your development of cavities and tooth decay. Just another added negative side effect to your favorite breakfast food.


You could suffer from allergies, digestive problems, or liver problems due to GMOs

bowl of cereal
Natsuko D/Aprile/ Unsplash

We bet you never thought it was your cereal giving you a rash or a stomach ache. However, most processed cereals are not only filled with sugar and carbs but also contain genetically modified organisms (GMOs). According to the Institute for Responsible Technology, there have been many studies indicating the harm to the body caused by GMOs in our food. Everything from links to allergies, trouble with digestion, and even liver damage could be a result of your bowl of cereal in the morning.

And for more, check out these 108 most popular sodas ranked by how toxic they are.

Rachel Linder
Rachel is an Associate Editor responsible for compiling the daily Eat This, Not That! newsletter, making TikTok and YouTube videos for the brand, writing articles for the site, creating original graphics and providing direct assistance to the editors when needed. Read more about Rachel
Filed Under