- Sugary breakfasts are a common habit that can spike your blood sugar fast.
- Pair protein, fiber, and healthy fats to keep blood sugar steady all morning.
- A balanced breakfast supports better focus, energy, and appetite control.
It’s 8 a.m. and you’re already rushing. You grab a chocolate muffin and a hazelnut latte from your favorite cafe and dash off to work. Quick and easy, right? While convenient, a breakfast that’s loaded with added sugar can set your energy and blood sugar levels on a roller coaster ride that may leave you feeling worse than before eating it.
“This roller coaster can lead people to feel hungry, tired, irritable in some cases, and not as mentally sharp or able to focus,” says Amy Huelle, M.P.H., RD, CDCES. You may even feel hungrier than before you ate, she adds. We can all agree that’s probably not the greatest state of mind or body for starting your workday.
Ahead, we break down what happens in your body after a sugary breakfast, how those blood sugar swings make you feel, and what to eat instead to help support stable energy and blood sugar levels throughout your morning.
Why Eating a Sugary Breakfast Can Raise Your Blood Sugar
Grabbing a pastry or sipping a sweetened latte can cause blood glucose to rise rapidly. This is especially true if your breakfast doesn’t have much fiber, protein or healthy fat to slow the absorption of sugar into the bloodstream, says Andrea Miller, RDN, CDCES.
But it doesn’t end there. That rapid surge in blood sugar triggers your pancreas to release a large amount of insulin, which can lead to a rapid drop in blood sugar. This may leave you feeling shaky, irritable or ravenous just an hour or two later.
“Some people can actually release too much insulin after a high sugar meal and their body overcompensates, causing their blood glucose to drop too low,” Miller says. “This is a condition known as reactive hypoglycemia.”
Miller explains that it’s normal for blood sugar to rise and fall after eating, but if you have a lot of sugar at once—especially on an empty stomach—you might experience more drastic peaks and drops. “For some people, this could lead to low energy and cravings for more sugar,” Miller says. “It can be a vicious cycle.”
How someone feels after a sugary breakfast varies from person to person. And some people may not notice any symptoms at all. For those who do, they may “notice a significant improvement in how they feel after making changes to their morning nutrition,” Huelle says. Yet, she points out, people with healthy blood sugar have a good set of checks and balances in the body to keep blood sugar at a steady state, and a rise in blood sugar after eating isn’t necessarily a bad thing.
“It is important to remember that one meal or an occasional day of [sugary meals] is not going to have long-term effects,” Miller says. “It’s all about our overall diet quality.”
How to Support More Stable Blood Sugar in the Morning
- Build a balanced breakfast: Start your day with a balanced meal that includes protein, fiber, and healthy fats. “Protein and fiber slow down digestion and keep blood sugar nice and steady, not a roller coaster ride like sugary refined carbohydrates,” Huelle says. Some of her favorite balanced breakfast meals include: strained (Greek-style) yogurt parfait with berries and seeds or a veggie omelet with whole-grain toast.
- Pair carbohydrates with protein: Combining carbohydrates with protein helps slow glucose absorption. Miller suggests topping your oatmeal with plain strained (Greek-style) yogurt or stirring in some protein powder. Other protein options include eggs, cottage cheese, tofu, beans, nuts and seeds.
- Limit sugary drinks: Juices, flavored coffee drinks, sweetened coffee creamers, soda and energy drinks are often loaded with added sugar, which can cause rapid spikes in blood sugar and increase the risk of type 2 diabetes. Try scaling back on sweeteners or choosing unsweetened options more often.
- Choose whole grains over refined carbs: White bread, pastries and sugary cereals digest quickly and can spike blood sugar. Instead, reach for high-fiber foods like whole-grain bread, oats, nuts, seeds, fruit and veggies. “These slow carbohydrate absorption, blunt blood sugar spikes and promote satiety,” Huelle says.
Other Morning Factors That May Play a Role
- Physical activity: “Light to moderate activity after meals can significantly lower blood sugar,” Huelle says. “I encourage my patients to walk 10-15 minutes after meals.”
- Sleep: Pay attention to your sleep quality, timing and duration. These all can influence your blood sugar and can increase the risk of type 2 diabetes, Huelle says. Prioritize getting enough rest to support your energy and metabolic health.
- Caffeine sensitivity: Some people are more sensitive to caffeine than others and may experience a blood sugar spike after drinking coffee, even if it’s unsweetened. Tune into how your body feels after your morning brew.
Our Expert Take
A sugary breakfast might give you a short-lived energy boost, but it can also lead to crashes that leave you feeling drained and craving more sugar. That said, occasional sweets are part of a balanced approach to eating. The key is making nourishing choices most of the time.
Starting your day with a balanced meal that includes protein, fiber, and healthy fats will provide more stable energy levels and help prevent a blood sugar rollercoaster.
