If your blood sugar drops below 70 mg/dL, you need fast-acting carbohydrates immediately, about 15 grams worth. That means something like half a cup of juice, a few glucose tablets, or a tablespoon of sugar. Once your levels stabilize, a balanced snack with protein and complex carbs will keep them from crashing again. The specifics of what to eat, when to eat it, and how to prevent future episodes all depend on where you are in a low blood sugar event.
What to Eat Right Now: The 15-15 Rule
The standard approach to treating a blood sugar drop is called the 15-15 rule. You eat 15 grams of fast-acting carbohydrates, wait 15 minutes, then check your blood sugar. If it’s still below 70 mg/dL, you eat another 15 grams and repeat. You keep going until your levels are back in your target range.
Foods that deliver roughly 15 grams of quick carbohydrates include:
- 3 glucose tablets (the fastest, most predictable option)
- Half a cup (4 ounces) of fruit juice or regular soda
- 6 or 7 hard candies
- 1 tablespoon of sugar (dissolved in water or eaten straight)
The key word here is “fast-acting.” You want simple sugars that hit your bloodstream quickly. This is not the time for a sandwich, a protein bar, or a piece of chocolate. Fat slows down digestion considerably, which delays the rise in blood sugar your body urgently needs. A candy bar or slice of pizza might seem like a reasonable sugar source, but the fat content means your glucose levels won’t recover as quickly. Stick with pure, simple carbs for the initial treatment.
For young children, especially infants and toddlers, 15 grams may be too much. A pediatrician can help you determine the right amount for a child’s size.
What to Eat After Your Levels Recover
Once your blood sugar climbs back above 70 mg/dL, you’re not done. The fast-acting carbs you just ate will burn off quickly, and without a follow-up snack, your levels can drop right back down. This is where protein and complex carbohydrates come in. They digest more slowly and keep your blood sugar stable over the next few hours.
Good follow-up snacks include:
- A slice of whole-grain bread with peanut butter
- One or two oat cakes with low-fat cheese
- A small bowl of whole-grain cereal with milk
- A piece of fruit with a handful of nuts
- Two tablespoons of raisins with a cheese stick
The common thread is pairing a carbohydrate with protein or fat. The carbs provide glucose, while the protein and fat slow the rate at which those carbs are digested. This creates a more gradual, sustained rise in blood sugar instead of a sharp spike followed by another crash.
Eating Patterns That Prevent Low Blood Sugar
If you’re experiencing low blood sugar episodes regularly, what you eat between episodes matters just as much as what you eat during one. A few dietary habits can make a significant difference.
Eating 5 to 6 smaller meals throughout the day, roughly every 3 hours, prevents the long gaps that let blood sugar drift too low. This is especially important on days when you’re more physically active. Each snack between meals should contain about 15 to 20 grams of carbohydrates, ideally paired with some protein. Think an apple with a tablespoon of peanut butter, or a small portion of crackers with cheese.
At meals, choose high-fiber, slow-digesting carbohydrates over refined ones. Whole-grain bread, brown rice, oats, and sweet potatoes release glucose gradually. Lentils, beans, and chickpeas are particularly good because they combine fiber and protein naturally. Avoid “instant” versions of grains (instant oatmeal, instant rice), which are processed to digest faster and can cause sharper blood sugar swings.
Keep carbohydrate portions moderate at any single meal, generally between 40 and 50 grams. Loading up on a large plate of pasta or rice can trigger a surge of insulin that overshoots, causing your blood sugar to plummet a few hours later. This pattern, sometimes called reactive hypoglycemia, is a common reason people without diabetes experience low blood sugar after eating.
Including healthy fats at meals, like olive oil, avocado, or nuts, further slows carbohydrate digestion and helps keep glucose levels steady. Every meal should ideally have three components: a complex carbohydrate, a protein source, and some fat. Adding colorful vegetables increases fiber content and slows the overall absorption of sugar from the meal.
Bedtime Snacks to Prevent Overnight Drops
Blood sugar can drop during sleep, which is particularly concerning because you can’t recognize the symptoms while unconscious. If you take insulin or other diabetes medications, a bedtime snack can act as a buffer against overnight lows.
The best bedtime snacks are high in protein or fiber and relatively low in carbohydrates. You’re not trying to raise your blood sugar, just provide a slow, steady source of glucose through the night. Good options include a tablespoon of peanut butter on celery, a hard-boiled egg, a light cheese stick, or a small serving of Greek yogurt. Air-popped popcorn also works well as a high-fiber, low-calorie choice. Salad greens with cucumber and a dash of oil and vinegar is another option if you want something light.
When Food Isn’t Enough
Blood sugar below 54 mg/dL is classified as severe hypoglycemia. At this level, you may experience confusion, difficulty speaking, blurred vision, or loss of coordination. If you can still eat and swallow safely, the 15-15 rule still applies, but you should treat it with more urgency.
If someone with low blood sugar loses consciousness or has a seizure, they should not be given food or drink. There is a real choking risk when someone can’t swallow properly. This is when an emergency glucagon kit becomes necessary. Glucagon is an injectable or nasal medication that rapidly raises blood sugar, and it’s the standard treatment when a person is too impaired to eat. If you take insulin, having a glucagon kit accessible and making sure the people around you know how to use it is a practical safety measure.