Trying to lose weight can be confusing. There is so much advice out there these days. One popular tip is to cut carbs (carbohydrates). That advice led to diets like keto and Atkins, which promise quick results.But the truth is that not all carbs are the same. Some, called complex carbs, can help you feel full and energized. Others, called refined carbs, may cause blood sugar spikes and energy crashes.
Knowing the difference between refined carbs and complex carbs can help you with your weight, energy and health. Here’s what you should know about reducing refined carbs and how healthier choices can make you feel better.
What makes a carb refined?
Refined carbs, or simple carbohydrates, are processed foods that lose most of their fiber, vitamins and minerals. This includes white bread, pastries, pasta, white rice, soda and candy.
“These carbs are digested quickly and can leave you hungry soon after eating,” said Beril Hezer, a registered dietitian at Banner Health. “They are often found in packaged foods that contain added sugar or preservatives, which provide little nutritional value.”
Refined carbs can quickly raise your blood sugar. You might experience a sudden rush of energy. But just as quickly, blood sugar can drop, leaving you tired, irritable and craving more sugar. This cycle can make it harder to control weight and can put stress on your insulin system.
The benefits of choosing less refined carbs
Switching to complex, minimally processed carbs can help your body in many ways.
More stable energy and fewer cravings
“Complex carbs that are high in fiber, like whole grains, fruit, vegetables and legumes, digest slowly,” Hezer said. “This keeps blood sugar stable and energy steady.”
High-fiber foods will also help you feel fuller for longer.
[Learn more about the benefits of fiber.]
Supports healthy blood sugar
Refined carbs can cause large blood sugar spikes. This is difficult for people with or at risk of type 2 diabetes. Eating high-fiber carbs can help keep blood sugar steady and make things easier for the body.
Better heart health
Eating a lot of simple carbohydrates can raise your triglycerides and cause weight gain, which can harm your heart. Eating whole grains, vegetables, fruits and legumes (beans, lentils, chickpeas) can help lower your blood pressure and cholesterol.
Supports gut health
Fiber from complex carbs feeds the helpful bacteria in your gut. A healthy gut can improve digestion, help your immune system and support your metabolism.
Weight management
Cutting out refined carbs can help you lose weight in the short term. "For short-term weight loss, cutting refined carbs helps because you eat fewer calories,” Hezer said.
Long-term success depends on how you choose to replace unhealthy foods. Hezer said, "Replacing refined carbs with foods that are high in fiber and nutrients helps you stay full, gives you more energy and keeps your metabolism working well. This is how you can keep weight off for good."
Practical ways to cut back on refined carbs
These simple changes can help you increase fiber and nutrients without giving up satisfaction:
- Start with breakfast: Swap sugary cereals and pastries for oatmeal, Greek yogurt with fruit or eggs with whole-grain toast. These options provide protein, fiber and nutrients that help you feel satisfied longer.
- Choose whole grains: Instead of white rice, white bread or regular pasta, try eating brown rice, quinoa, barley or whole-grain pasta. These grains are less processed and keep more of their natural nutrients and fiber. “Almost all foods go through some form of processing, like washing or chopping, but try to stick to food closest to its original form,” Hezer said.
- Load up on fruits and vegetables: Fresh, frozen or minimally processed fruits and vegetables are good choices instead of refined carbs. For example, pick apple slices instead of packaged fruit snacks or roasted sweet potatoes instead of potato chips. These foods give you fiber, vitamins and antioxidants.
- Mind your snacks: Instead of cookies, crackers or candy, try eating raw nuts, air-popped popcorn or hummus with veggie sticks. You can also choose simple options like whole-grain rice cakes or fruit bars without added sugar.
- Balance meals with protein and healthy fats: Pairing carbs with protein or fat slows down digestion and helps keep blood sugar stable. For example, you can add nut butter to whole-grain toast or serve brown rice with beans and avocado.
It can be tricky to know which carbs are refined. A quick glance at the ingredients can help.
“If the first ingredient is a whole grain, it’s generally a more nutrient-dense choice,” Hezer said. “And if it lists sugar, white flour or corn syrup near the top, it’s likely a refined, less nutrient-dense option.”
Tips for making it last
Changing what you eat doesn’t happen overnight. You don’t have to change everything at once. Start slow by swapping out one refined carbohydrate. Maybe you change your breakfast this week and your snacks next week. Celebrate small wins and watch how your energy and hunger change.
“People often think that being mindful about refined carbs means being overly restrictive, but it can actually support a more balanced way of eating,” Hezer said. “The goal is to prioritize nutrient-dense, high-fiber options that promote steady blood sugar and support how you feel day to day.”
Remember, it’s okay to have treats sometimes. Eating a piece of cake or a few cookies doesn’t ruin your efforts. The focus is on building consistent habits with minimally processed, nutrient-rich foods and making good habits.
When cutting back may not be in the cards
Low-carb diets are not suitable for everyone. If you are an athlete, pregnant or have health problems like diabetes or kidney disease, talk to your health care provider or a registered dietitian before starting a low-carb diet.
“Dietitians can help you find a plan that works for your lifestyle,” Hezer said. “We focus on balance and sustainability rather than extreme restrictions, which helps people maintain healthy habits for the long term.”
Consider guidance as well if you experience ongoing fatigue, strong cravings, concerns about blood sugar or questions about managing your weight.
Takeaway
Carb quality is important. Picking complex carbs instead of simple, refined ones helps with energy, weight management and overall health. Small, easy changes like using brown rice instead of white rice or sweet potatoes instead of white potatoes can make a big difference over time.
If you have questions, ask your health care provider or a Banner Health expert. They can help make a plan that fits your needs, making it easier to choose nutrient-dense carbs and still enjoy your meals.
