What Can You Eat When Your Blood Sugar Is Low?

Fast-acting carbohydrates that dissolve or digest quickly are the first thing to reach for when blood sugar drops too low. Glucose tablets are the gold standard, but fruit juice, regular soda, honey, and hard candy all work. The goal is to get roughly 15 to 20 grams of simple carbohydrate into your system as fast as possible, wait about 15 minutes, then recheck. What you eat after that initial rescue matters too, and the best choices shift depending on whether you are treating an acute low, preventing one overnight, or managing a pattern of blood sugar crashes after meals.

Why Glucose Tablets Beat Most Other Options

Glucose tablets are not just convenient packaging. A systematic review and meta-analysis comparing glucose tablets to other dietary sugars found that people treated with glucose tablets had a higher rate of symptom relief 15 minutes after ingestion than those treated with other dietary sugars like juice, sucrose, or candy.¹ The reason is straightforward: glucose tablets deliver pure glucose, the exact molecule your blood needs more of. Other sugars have to be broken down first. Sucrose, for instance, is half glucose and half fructose, so your body splits it before the glucose portion enters the bloodstream.

That said, glucose tablets are not always within arm’s reach. If you do not have them, the practical alternatives include four ounces of fruit juice, five or six ounces of regular (not diet) soda, a tablespoon of honey, or a few hard candies like jelly beans. All of these contain simple sugars that will raise blood glucose within minutes. The key is choosing something that is pure carbohydrate without much fat or protein, because fat slows stomach emptying and delays the sugar hit you need right now.

Not All Sugars Are Created Equal

If glucose and sucrose both work, you might assume fructose does too. It does raise blood sugar, but more slowly and less effectively in the critical first 15 to 20 minutes. A study in children with type 1 diabetes compared equal doses of glucose, sucrose, and fructose for treating hypoglycemia and found no significant difference between glucose and sucrose, but fructose performed significantly worse than both.² Fructose takes a detour through the liver before it contributes to blood glucose, which makes it a poor first responder. This matters when you are standing in front of a vending machine or rummaging through your bag: an apple or a piece of fruit with primarily fructose-based sugars will eventually help, but it will not pull you out of a low as quickly as orange juice, where the sugar profile leans more heavily on sucrose and glucose.

This also explains why chocolate bars and cookies are often on the “do not use” list for treating acute lows, even though they contain sugar. The fat in chocolate slows gastric emptying, and the sugar composition is mixed. A study on dark chocolate found that its glucose-raising effect is blunted compared to simpler carbohydrate sources, and sugar-free dark chocolate produced even less of a blood glucose response.³ Chocolate is fine as a snack, but it is unreliable as a rescue food during a genuine low.

Liquid Versus Solid Carbs

When you are shaky and sweating, juice or a sugar-containing drink is often easier to get down than chewing and swallowing tablets or candy. Research comparing liquid and solid carbohydrate foods that are matched for carbohydrate content has found differences in the speed and pattern of the blood sugar response, with liquids generally producing a faster initial rise.⁴ In practice, this means that a small box of juice or half a can of regular soda will start working a bit faster than glucose tablets, though tablets catch up quickly because they dissolve in the mouth. If you are feeling too disoriented to chew safely, a liquid carb source is the better bet.

One caution: do not gulp a large bottle of juice or an entire can of soda. Overshooting with too much sugar is a common mistake that leads to a blood sugar spike an hour later, followed by another potential crash. Stick to roughly 15 grams of carbohydrate, which is about four ounces of juice, and then wait to recheck.

What to Eat After the Initial Rescue

The fast-acting sugar that pulls you out of a low will burn off quickly. If your next meal is more than an hour away, you need a follow-up snack that includes some protein or fat alongside a more complex carbohydrate. Think a small handful of crackers with peanut butter, a slice of cheese with whole-grain bread, or half a turkey sandwich. The protein and fat slow the digestion of the carbohydrate, creating a more sustained blood glucose release that keeps you from dipping again 45 minutes later.

People on insulin sometimes skip this step because they are afraid of going high. The instinct makes sense, but the rebound low that can follow an untreated fast-acting sugar dose is often worse than a modest and temporary rise. Finding the right follow-up portion takes some trial and error, and it depends on your insulin regimen, your activity level, and how far your blood sugar dropped in the first place.

Preventing Overnight Lows With Bedtime Snacks

Nighttime is when blood sugar can drop without you noticing, especially if you use insulin. The composition of a bedtime snack makes a real difference here. A trial comparing different bedtime snacks in adults with type 1 diabetes on intensive insulin therapy found that both a standard snack (containing carbohydrate) and a higher-protein snack completely prevented nocturnal hypoglycemia, while skipping the snack entirely led to most of the overnight lows. The majority of hypoglycemic episodes in the study occurred on nights when no snack was eaten.⁵

An older but interesting approach involves uncooked cornstarch, which digests very slowly. Research in people with type 1 diabetes found that uncooked cornstarch taken at bedtime produced a gradual blood glucose rise that peaked about four hours later, effectively filling in the overnight valley when blood sugar tends to dip. The number of self-reported hypoglycemic episodes dropped, and the slow release did not worsen long-term blood sugar control.⁶ Cornstarch mixed into yogurt or applesauce is one way people use this in practice, though it is worth discussing the approach with your care team to get the amount right.

The general principle for bedtime snacks is to combine a slow-digesting carbohydrate with some protein or fat. A glass of milk, a small serving of nuts with a few whole-grain crackers, or cheese and fruit all fit the profile. The goal is not a big meal; it is a metabolic buffer that keeps your liver supplied with enough fuel to maintain blood glucose through the hours when you are not eating.

Reactive Hypoglycemia Is a Different Problem

Not everyone who experiences low blood sugar has diabetes. Reactive hypoglycemia is a condition where blood sugar drops within a few hours after eating, usually triggered by a meal heavy in refined carbohydrates. The body overproduces insulin in response to the sugar spike, and blood glucose plummets on the back side. If this is your pattern, the dietary strategy is almost the opposite of what you would do for an acute insulin-induced low: instead of adding simple sugars, you want to avoid them.

A randomized crossover trial tested a high-fiber, whole-grain diet against a standard diet in people with reactive hypoglycemia and found significantly fewer hypoglycemic episodes during the day on the whole-grain diet.⁷ The logic is that whole grains, legumes, and vegetables produce a slower, more gradual rise in blood sugar, so the insulin response is more measured and does not overshoot. If you get shaky and lightheaded two to three hours after meals but do not take diabetes medication, the fix is usually to restructure what you eat at the meal itself: more fiber, more protein, fewer refined carbs, and smaller portions of starchy foods spread across the day rather than concentrated in one sitting.

When a reactive low does strike, you still need fast-acting sugar to bring blood glucose back up in the moment. But the longer-term management goal is to stop the pattern from repeating, and that comes down to meal composition rather than treating the crash after it happens.

Alcohol and Low Blood Sugar

Alcohol adds a layer of complexity because it can lower blood sugar for hours after you stop drinking. The mechanism involves multiple pathways: alcohol reduces glucose production in the liver by interfering with the chemical processes that release stored glucose, it can increase insulin secretion, and it slows the absorption of glucose from the gut.⁸ The danger is especially real for people on insulin or medications that stimulate insulin production, because the drug effect stacks on top of alcohol’s independent glucose-lowering action.

If you drink alcohol, eating carbohydrate-containing food before or alongside the drinks helps offset the drop. A meal with starchy carbs and protein before drinking, and a snack before bed afterward, can reduce the risk of a delayed low that hits in the middle of the night. Avoid sugary cocktails as your safety net, though: the sugar in a mixed drink causes a fast spike followed by a crash, and the alcohol delays your liver’s recovery. A more sustained carbohydrate source like bread, crackers, or a sandwich is more protective.

When Gastroparesis Complicates the Picture

Some people with diabetes develop gastroparesis, a condition in which the stomach empties food unusually slowly because of nerve damage. Gastroparesis makes blood sugar control especially difficult because the timing between when you eat, when food actually enters your intestines, and when your insulin peaks can all become mismatched.⁹ You might take insulin for a meal, but the food sits in your stomach for hours and the insulin acts on an empty bloodstream, pulling sugar dangerously low.

For people with gastroparesis, liquid carbohydrate sources are generally more reliable because they pass through the stomach faster than solids. Small, frequent meals that are lower in fat and fiber (which slow gastric emptying further) tend to produce more predictable blood sugar patterns. When a low does occur, glucose dissolved in water or a small amount of juice is usually the safest rescue option because it does not depend on solid food getting past a sluggish stomach. Managing gastroparesis and hypoglycemia together often requires working closely with a specialist to time insulin doses around actual absorption rather than meal timing.

Treating Lows in Young Children

Toddlers and very young children present a unique challenge because they cannot always tell you when they feel low. Their communication skills are not yet developed enough to report the shakiness, dizziness, or confusion that an adult would recognize as a blood sugar warning.¹⁰ Parents and caregivers have to rely on behavioral cues: sudden crankiness, unusual sleepiness, refusal to eat, or a glazed look can all signal a low.

The treatment is the same in principle: fast-acting carbohydrate in an age-appropriate form. Glucose gel that can be rubbed on the inside of the cheek is useful for small children who cannot or will not chew tablets. A few ounces of juice works well if the child is alert enough to swallow safely. The amount of carbohydrate needed is smaller than for adults, typically around 5 to 10 grams depending on the child’s weight, so it is easy to overshoot with a full juice box. Having pre-measured portions ready saves time and stress during what is already a tense moment.

Foods That Do Not Help During a Low

Knowing what to avoid is almost as useful as knowing what works. Several common choices either work too slowly or backfire entirely:

Diet soda or sugar-free drinks: These contain no carbohydrate at all and will not raise blood sugar.
Peanut butter by itself: High in fat and protein with very little carbohydrate. It is a good follow-up food but will not pull you out of a low.
Ice cream: The high fat content delays glucose absorption significantly. A bowl of ice cream might eventually raise your blood sugar, but not in the 15-minute window you need.
Pizza or heavy meals: Same problem as ice cream, compounded by the large volume of food that slows digestion further.
Protein bars: Most have significant fat and protein with relatively slow-digesting carbohydrate. Fine for preventing a later low, but too slow to treat one happening now.

The pattern across all of these is that fat and protein, while valuable at other times, actively work against you during an acute low by slowing the delivery of sugar into your bloodstream.

Building a Low Blood Sugar Kit

People who experience lows regularly often keep a small kit in their bag, car, or nightstand. A practical kit contains glucose tablets (four to five tablets equals about 15 to 20 grams of carbohydrate), a small juice box, a tube of glucose gel for emergencies where chewing is difficult, and a follow-up snack like individually wrapped crackers with peanut butter. Keeping these separate from your everyday snacks prevents absent-minded eating that leaves you empty-handed when you actually need them.

Glucose tablets have a long shelf life and do not melt or leak, which makes them ideal for glove compartments and desk drawers. Juice boxes are less durable in heat but better for someone who is too disoriented to chew. Having both covers more scenarios. If you are responsible for a child with diabetes, stashing duplicates at school, with grandparents, and in the diaper bag means there is always something within reach regardless of where the low happens.