When your blood sugar drops below 70 mg/dL, you need fast-acting carbohydrates immediately, followed by a balanced snack or meal to keep levels stable. But what you eat between episodes matters just as much. The right combination of complex carbs, protein, and healthy fat at meals and snacks can prevent blood sugar crashes from happening in the first place.
What to Eat During a Low Blood Sugar Episode
The standard approach is called the 15-15 rule: eat 15 grams of fast-acting carbohydrates, wait 15 minutes, then check your blood sugar. If it’s still below 70 mg/dL, repeat. Keep going until your levels return to your target range.
The key word here is “fast-acting.” You want simple sugars that hit your bloodstream quickly, not complex carbs that take time to digest. Here’s what 15 grams of fast-acting carbs looks like in practical terms:
- Fruit juice (unsweetened): half a cup
- Glucose tablets: 3 to 4 tablets (check the label)
- Hard candy: 3 pieces
- Regular soda (not diet): half a cup
- Honey or maple syrup: 1 tablespoon
- Raisins or dried fruit: 2 tablespoons
Once your blood sugar stabilizes, follow up with a more substantial snack or meal that includes protein and complex carbs. The fast-acting sugar is a quick fix, not a lasting one. Without that follow-up, your levels can drop again within an hour or two.
When Food Isn’t Enough
There are situations where eating your way out of a low isn’t possible. If someone with hypoglycemia loses consciousness, has a seizure, or can’t swallow safely, they should not be given food or drink. This is when emergency glucagon, a hormone that rapidly raises blood sugar, becomes necessary. The same applies if someone has tried repeated doses of sugar without improvement. If you take insulin or medications that can cause severe lows, talk with your care team about keeping glucagon on hand and making sure the people around you know how to use it.
Meals That Prevent Blood Sugar Crashes
If you experience reactive hypoglycemia, where your blood sugar drops a few hours after eating, the problem usually starts with what you ate at your last meal. A meal heavy in simple carbs causes a rapid spike in blood sugar, which triggers a surge of insulin that can overshoot and send your levels crashing down. The fix is slowing down how quickly carbohydrates enter your bloodstream.
Three things slow carbohydrate digestion: fiber, protein, and fat. Pairing all three with your carbs at every meal is the most effective strategy. When you add protein and healthy fat to complex carbohydrates, your body breaks down the carbs much more gradually, preventing the spike that leads to the crash.
A practical example: instead of eating white rice on its own, combine brown rice with grilled chicken and vegetables cooked in olive oil. Instead of a plain bagel, try whole-grain toast with eggs and avocado. The goal is never eating carbs alone, especially refined ones.
Proteins That Help
Good options include lean meat, fish, eggs, tofu, beans, cottage cheese, and Greek yogurt. Beans pull double duty because they’re high in both protein and fiber, making them especially effective at keeping blood sugar steady. Lentils and chickpeas work the same way.
Fats That Help
Healthy fats from extra virgin olive oil, avocado oil, and nut or seed oils are ideal for cooking. Drizzle them on vegetables and salads or use them to cook lean meats. Avocado, nuts, and seeds are whole-food sources that add fat naturally to meals and snacks.
The Best Snack Options
Nuts deserve special mention. Depending on the variety, they contain complex carbohydrates, protein, and healthy fat all at once. A handful of almonds or walnuts between meals can help bridge the gap and keep your blood sugar from drifting low. Other solid snack combinations include apple slices with peanut butter, cheese with whole-grain crackers, or hummus with vegetables.
Foods That Make Hypoglycemia Worse
Sugary foods and processed simple carbohydrates are the biggest culprits. White bread, white pasta, pastries, candy, and sweetened drinks cause rapid blood sugar spikes followed by steep drops. This is especially problematic on an empty stomach, where there’s nothing to buffer the sugar hitting your system all at once.
Alcohol is another trigger. It can interfere with your liver’s ability to release stored glucose, increasing the risk of a low, particularly if you drink without eating. If you do drink, always have food alongside it.
Skipping meals is just as risky as eating the wrong foods. Going too long without eating leaves your body without a steady fuel source. If you’re prone to hypoglycemia, smaller, more frequent meals (every 3 to 4 hours) with balanced macronutrients are more effective than three large meals spaced far apart.
Choosing Low-Glycemic Foods
The glycemic index (GI) ranks foods by how quickly they raise blood sugar. Low-GI foods are digested and absorbed slowly, providing a gradual, sustained release of glucose. High-GI foods are absorbed rapidly, creating the kind of spike-and-crash pattern you want to avoid.
Foods with a low glycemic index include green vegetables, most whole fruits, raw carrots, kidney beans, chickpeas, and lentils. Whole grains like steel-cut oats, barley, and quinoa also rank low. On the other end, white bread, instant oatmeal, white rice, and potatoes rank high. Swapping high-GI staples for low-GI alternatives at each meal can make a noticeable difference in how stable your blood sugar stays throughout the day.
What to Eat Before Bed
Nighttime blood sugar drops are common and particularly concerning because you can’t feel the warning signs while you’re asleep. Research shows that bedtime snacks combining carbohydrates, protein, and fat are most effective at preventing overnight lows, especially when your blood sugar before bed is below 130 mg/dL.
Aim for 15 to 30 grams of carbohydrates paired with a serving of protein. Some combinations that work well:
- Crackers with peanut butter: the crackers provide carbs while the peanut butter adds protein and fat
- A small bowl of whole-grain cereal with milk: delivers both protein and complex carbs
- A half sandwich with lean meat or hummus: easy to customize and filling enough to last through the night
- Greek yogurt with a small piece of fruit: high in protein with moderate, slow-digesting carbs
The bedtime snack doesn’t need to be large. You’re not eating a full meal. You’re giving your body just enough sustained fuel to maintain stable glucose levels over 7 to 8 hours of fasting while you sleep.