If your blood sugar is dropping or already low, you need fast-acting carbohydrates: glucose tablets, fruit juice, honey, or regular soda. These simple sugars enter your bloodstream quickly and can bring your levels back above 70 mg/dL within minutes. What you eat after that initial fix, and how you eat throughout the day, matters just as much for keeping your blood sugar stable.
The 15-15 Rule for Immediate Treatment
The standard approach recommended by the CDC is straightforward: eat 15 grams of fast-acting carbohydrates, wait 15 minutes, then check your blood sugar again. If it’s still below 70 mg/dL, repeat the process. This prevents both undertreating (staying dangerously low) and overtreating (spiking your blood sugar too high in the other direction).
Fifteen grams of fast-acting carbohydrates looks like:
- Glucose tablets: 3 to 4 tablets (check the label, as brands vary)
- Fruit juice: about two-thirds of a cup (150 mL)
- Regular soda: half a can (not diet)
- Honey: 1 tablespoon
- Hard candies: 4 to 5 pieces like Lifesavers
- Table sugar: 1 tablespoon dissolved in water
Young children need less than 15 grams per dose, especially infants and toddlers. Your pediatrician can give you the right number for your child’s age and weight.
What Not to Eat During a Blood Sugar Drop
When your blood sugar is crashing, your instinct might be to grab whatever food is nearby. But fat and protein actually slow down how quickly sugar reaches your bloodstream. Chocolate bars, peanut butter, cheese, and nuts are poor choices for the initial fix because the fat in these foods delays digestion. Protein can even have its own blood sugar-lowering effect, which is the opposite of what you need in that moment.
Save those foods for after you’ve treated the low. Once your blood sugar is back above 70 mg/dL, eating a small meal or snack that includes protein, fat, and complex carbohydrates helps keep your levels from dropping again.
What to Eat After You’ve Treated the Low
Fast-acting sugar fixes the immediate problem, but it burns through quickly. If your next meal is more than an hour away, follow up with a balanced snack that provides sustained energy. Think a piece of whole-grain toast with peanut butter, cheese and crackers, or yogurt with a small handful of granola. The combination of fiber, protein, and fat slows digestion and gives your body a steadier supply of glucose over the next few hours.
If your low happened right before a meal, simply go ahead and eat. Prioritize getting some protein and vegetables on the plate alongside your carbohydrates.
Eating Patterns That Prevent Lows
If you’re experiencing repeated drops in blood sugar, how you structure your meals throughout the day can make a real difference. Eating a moderate breakfast, a regular lunch, and a lighter, earlier dinner helps keep glucose levels more predictable. Going too long between meals is one of the most common triggers for blood sugar dips.
A strategy that works well for many people: eat a small, high-protein snack about 90 to 120 minutes before breakfast. Something simple like an egg, a handful of nuts, or coffee with half a cup of milk. This creates what researchers call a “second-meal effect,” which smooths out the glucose spike that typically follows breakfast. That smoother rise means a less dramatic drop afterward.
Spacing meals 2 to 3 hours apart, with optional small snacks in between, keeps your body from running out of fuel. An afternoon snack with a small amount of carbohydrate (a piece of fruit, a few crackers) can bridge the gap between lunch and dinner, which is a common window for blood sugar to dip.
The Order You Eat Matters
An easy trick that requires no special foods: eat your protein and vegetables first, then your carbohydrates 10 to 30 minutes later. This nutrient sequencing slows the rate at which sugar enters your bloodstream after a meal, reducing both the spike and the crash that can follow. It’s particularly useful if you experience low blood sugar a few hours after eating, a pattern called reactive hypoglycemia.
Building Meals That Keep Blood Sugar Steady
The composition of your meals is just as important as the timing. Every meal should include fiber, lean protein, non-starchy vegetables, and some healthy fat alongside your carbohydrates. This combination slows the breakdown and absorption of sugar, keeping your blood glucose on a more even keel instead of swinging between highs and lows.
In practical terms, that means pairing your rice with chicken and roasted vegetables, adding avocado or nuts to a salad, or choosing whole-grain bread over white. These aren’t dramatic changes, but they meaningfully reduce how quickly carbohydrates hit your bloodstream. If you notice your blood sugar climbing above 180 mg/dL after meals, reducing your carbohydrate portion at that meal is a reasonable adjustment.
Preventing Low Blood Sugar Overnight
Nighttime lows are tricky because you’re asleep and can’t feel the warning signs until they’re severe. A bedtime snack can help, but whether you need one and what it should contain depends on where your blood sugar is before you go to sleep.
Research published in Diabetes Care found that a standard bedtime snack combining starch and protein, or even a protein-heavy snack, completely prevented overnight lows in the study group. The key findings break down by your pre-bed blood sugar reading:
- Above 180 mg/dL: No snack needed.
- Between 126 and 180 mg/dL: Any small snack is a reasonable precaution.
- Below 126 mg/dL: A snack with both starch and protein is recommended. Think crackers with cheese, a small bowl of cereal with milk, or toast with peanut butter.
The protein component is what matters most here. It provides a slow, sustained source of glucose that lasts through the night without causing a spike.
When Food Isn’t Enough
If someone’s blood sugar drops so low that they become confused, lose consciousness, or can’t safely swallow, food is no longer a safe option because of the risk of choking. This is when glucagon, a prescription emergency treatment, becomes necessary. Glucagon signals the liver to release stored sugar into the bloodstream and can be given by injection or nasal spray without needing the person to swallow anything. Anyone on insulin or at risk for severe lows should have a glucagon kit accessible, and the people around them should know where it is and how to use it.
While waiting for glucagon to take effect or for emergency help to arrive, an unconscious person should be turned on their side to keep their airway clear.