Healthy beverage choices may help prevent energy crashes and support stable glucose levels throughout the day
Many people focus on food choices when trying to maintain healthy blood sugar levels, but what they drink during the day can also play an important role.
Afternoon energy crashes, especially the common 3 p.m. slump, are often linked to fluctuations in blood sugar caused by sugary drinks or beverages lacking nutrients that help maintain steady energy.
Nutrition experts say choosing drinks that are low in added sugar and contain beneficial nutrients such as fiber, protein or antioxidants can support better blood sugar management.
Registered dietitians have highlighted five afternoon drink options that may help maintain stable energy levels without causing sudden glucose spikes.
1. Unsweetened Sparkling Water: A Refreshing Alternative to Sugary Drinks
Unsweetened sparkling water is one of the simplest choices for people looking to replace sugary sodas and sweetened beverages.
Dietitians say sparkling water provides hydration while offering a refreshing fizzy experience without adding unnecessary sugar or carbohydrates.
Lisa Andrews, a registered dietitian, explained that sparkling water can be a useful alternative for people who struggle to drink enough plain water or often choose sugary drinks.
Adding fresh lemon or lime juice can improve flavor while keeping sugar levels low.
Nutrition expert Sheri Gaw said naturally flavored sparkling waters or versions with a small amount of fruit juice can support blood sugar control because they contain little to no added sugar and minimal calories.
Although some early research has examined whether carbonated water itself may influence glucose metabolism, experts say more studies are needed to confirm any direct impact on blood sugar.
2. Green Tea: Antioxidant-Rich Drink With Potential Blood Sugar Benefits
Green tea is another recommended afternoon beverage because it is naturally free of calories and sugar while providing antioxidants.
Dietitians say compounds found in green tea may support the body’s ability to regulate blood sugar levels.
According to Tina Sergi, a registered dietitian, a 2024 review found that green tea consumption was linked with modest improvements in:
- Fasting blood sugar levels
- Insulin resistance
- HbA1c levels, which measure average blood sugar over several months
However, experts warn that adding sugar or honey can reduce these benefits.
Lisa Andrews recommends drinking green tea without sweeteners to better support healthy glucose levels.
While green tea may contribute to better blood sugar management, experts emphasize that it should complement—not replace—a balanced diet, regular physical activity and prescribed medical treatments.
3. Balanced Smoothies: Combining Protein, Fiber and Healthy Fats
Smoothies are sometimes considered unhealthy because many commercial versions contain large amounts of sugar.
However, dietitians say a carefully prepared smoothie with the right balance of nutrients can provide long-lasting energy and help prevent blood sugar spikes.
Sheri Gaw recommends including three important components:
- Protein
- Fiber
- Healthy fats
These nutrients slow digestion and help the body absorb carbohydrates more gradually, which may result in steadier blood sugar levels.
A balanced smoothie recipe suggested by Gaw includes:
- A handful of leafy greens
- One cup of fresh fruit
- Dairy milk or unsweetened soy milk
- Yogurt or kefir
- One to two tablespoons of nuts, seeds or nut butter
The combination provides important nutrients while making the drink more filling.
Dietitians also note that smoothies made with whole fruits may affect blood sugar differently than fruit juices because whole fruits contain fiber, which slows sugar absorption.
Protein also plays an important role by reducing hunger and helping maintain stable glucose levels.
4. Herbal Tea: A Sugar-Free Option With Potential Benefits
Herbal teas such as chamomile, mint and ginger tea are naturally caffeine-free and can provide hydration without added sugar.
Sheri Gaw says these teas may support blood sugar management when consumed without sweeteners.
Some research suggests certain herbal teas could have positive effects, particularly among people managing type 2 diabetes.
Cinnamon tea has received particular attention because cinnamon contains compounds that may help improve insulin sensitivity.
Lisa Andrews says cinnamon tea may support better afternoon blood sugar control because cinnamon has properties associated with lowering blood sugar levels.
Researchers believe cinnamon may help improve how efficiently the body uses insulin, allowing cells to process carbohydrates more effectively.
However, experts say more research is still needed to fully understand cinnamon’s role in blood sugar management.
5. Prebiotic Low-Sugar Soda: A New Functional Beverage Option
Prebiotic sodas have become increasingly popular as consumers look for healthier alternatives to traditional soft drinks.
Unlike regular sodas that often contain high amounts of sugar, prebiotic versions contain added fibers that may support gut health and blood sugar control.
Sheri Gaw explains that prebiotic low-sugar sodas usually contain fewer carbohydrates than traditional sodas, and the fiber content may help reduce rapid blood sugar increases.
Dietitians believe the fiber in these drinks may slow carbohydrate absorption and prevent sudden glucose spikes.
Lisa Andrews adds that prebiotic fibers may also support blood sugar regulation indirectly by improving gut health and potentially helping with insulin resistance.
However, experts advise moderation. Drinking too many prebiotic beverages may cause digestive issues such as gas and bloating due to their high fiber content.
Dietitians recommend limiting intake to around one or two cans per day.
Choosing the Right Afternoon Drink Matters
Experts say maintaining healthy blood sugar is not about relying on a single drink but making consistent lifestyle choices.
Replacing sugary beverages with options like sparkling water, green tea, balanced smoothies, herbal teas and low-sugar functional drinks can help support more stable energy levels.
However, people with diabetes or blood sugar-related health conditions should continue following medical advice and prescribed treatment plans.
The best afternoon beverage choices are those that provide hydration, essential nutrients and steady energy without causing unnecessary sugar spikes.
