The best snack for low blood sugar depends on how low you are. If your blood sugar has dropped below 70 mg/dL, the fastest fix is 15 grams of simple carbohydrates: think fruit juice, glucose tablets, or a small handful of raisins. If your blood sugar is mildly low or you’re trying to prevent a drop, a snack that pairs carbohydrates with protein or fat will keep levels stable for longer. Knowing which situation you’re in determines what to reach for.
The 15-15 Rule for Acute Lows
When blood sugar falls below 70 mg/dL, speed matters. The standard approach is the 15-15 rule: eat 15 grams of fast-acting carbohydrates, wait 15 minutes, then recheck your blood sugar. If it’s still below your target range, repeat. Young children typically need less than 15 grams per round.
The key word here is “fast-acting.” You want sugar that hits your bloodstream quickly, which means simple carbohydrates with minimal fat, fiber, or protein slowing things down. Fat in particular delays gastric emptying, creating a lag in glucose absorption. That’s why a candy bar or a slice of pizza is a poor choice for treating an active low, even though both contain plenty of carbs.
Good options that deliver roughly 15 grams of fast-acting carbs include:
- Glucose tablets: pre-measured and portable, designed for exactly this purpose
- 4 oz (half a cup) of fruit juice: grape juice or apple juice work well
- A tablespoon of honey or maple syrup: especially useful if chewing is difficult
- A small box of raisins: shelf-stable and easy to carry
- A few Medjool dates or a small banana: whole fruit options with concentrated sugar
When Blood Sugar Drops Below 55 mg/dL
Below 55 mg/dL, your brain starts running short on fuel. This is classified as level 2 hypoglycemia, the threshold where neurological symptoms like confusion, difficulty speaking, and coordination problems begin. At this level, some people have trouble chewing and swallowing solid food. Liquid carbohydrates are your safest bet: concentrated grape juice, a spoonful of honey, or maple syrup dissolved in water. Skip anything with fiber or fat entirely. The goal is pure, rapid glucose delivery.
Level 3 hypoglycemia is more severe still, defined not by a specific number but by the need for someone else to help you. If you can’t treat yourself, this is a medical emergency.
Follow-Up Snacks to Stay Stable
Fast-acting sugar solves the immediate problem, but it burns off quickly. Without a follow-up, your blood sugar can crash again within an hour or two. Once your levels are back in range after treating a low, eating a more substantial snack that combines complex carbohydrates with protein helps prevent a secondary drop.
Practical follow-up snacks include whole-grain crackers with cheese, peanut butter on toast, a handful of nuts with a piece of fruit, or yogurt with granola. The protein and fat slow digestion, releasing glucose gradually rather than in a single spike. The CDC recommends pairing carbohydrates with a protein source like meat, nuts, or low-fat dairy to avoid blood sugar swings and stay fuller longer.
Best Snacks to Prevent Lows Before They Happen
If you’re prone to blood sugar dips, whether from diabetes medications, reactive hypoglycemia, or long gaps between meals, the best snack is one you eat before you crash. Eating a small balanced snack every two to four hours can help prevent reactive hypoglycemia, where blood sugar drops a few hours after a meal.
Nuts are one of the most effective preventive snacks because they naturally combine carbohydrates, protein, and healthy fat in one package. Almonds, cashews, and pistachios all fit the bill. Other strong options: apple slices with almond butter, a hard-boiled egg with a small piece of fruit, or a handful of trail mix. The combination of macronutrients creates a slow, steady release of glucose instead of a sharp spike followed by a crash.
Bedtime Snacks to Prevent Overnight Lows
Nocturnal hypoglycemia is a particular concern for people on insulin. A study in adults with type 1 diabetes found that a bedtime snack containing protein, or a standard snack combining starch and protein, completely prevented overnight lows when blood sugar was in certain ranges before bed. At bedtime readings between roughly 126 and 180 mg/dL, any snack helped. Below 126 mg/dL, a snack with protein or one combining starch and protein was most protective.
A practical bedtime snack might be a glass of milk, a small serving of cottage cheese with crackers, or a slice of whole-grain bread with peanut butter. The protein component is what makes the difference, providing a slow source of fuel that lasts through the night.
Snacks for Exercise-Related Lows
Exercise can pull blood sugar down during and especially after a workout. Research on people with type 1 diabetes found that a pre-exercise snack containing about 13 grams of carbohydrate, whether from orange juice, whole milk, or skim milk, prevented post-exercise hypoglycemia. Whole milk performed particularly well because its fat content slows absorption, providing a sustained glucose release that matches the delayed drop exercise can cause.
For longer or more intense workouts, you may need additional carbs during the activity itself. A banana, a small juice box, or a few glucose tablets kept in your gym bag give you quick access if you start feeling symptoms mid-workout.
What to Keep on Hand
The best snack for low blood sugar is one you actually have with you. Glucose tablets, small juice boxes, raisins, and individually wrapped fruit snacks are all shelf-stable, lightweight, and easy to stash in a bag, glove compartment, desk drawer, or nightstand. Keeping a fast-acting option within reach at all times means you’re never scrambling when symptoms hit.
For your follow-up and preventive snacks, single-serve packets of nut butter, small bags of trail mix, and cheese-and-cracker packs travel well and don’t need refrigeration. Having both types available, something fast for emergencies and something balanced for prevention, covers you in either situation.