What Should I Eat If My Blood Sugar Is Low?

If your blood sugar is low and you can swallow safely, the standard advice is the 15-15 rule: eat or drink 15 grams of fast-acting carbohydrate, wait 15 minutes, and check your blood sugar again. Good choices include 4 ounces (half a cup) of fruit juice or regular soda, 1 tablespoon of sugar or honey, or 3 to 4 glucose tablets. If you are still below 70 mg/dL after 15 minutes, repeat the treatment. Once your reading is back in range, eat a small snack or meal that combines carbohydrate with protein to keep it from dropping again.

That is the short answer. The rest of this article explains why these foods work, which ones people get wrong, and what to do differently depending on how low you are and what caused it.

What Counts as Low Blood Sugar?

For most people with diabetes, a blood sugar reading below 70 mg/dL is considered low, or hypoglycemia. This is a widely used threshold in clinical guidance. Some people feel symptoms at higher readings, and some feel nothing at all even when they are genuinely low.

Symptoms of low blood sugar can include shakiness, sweating, a racing heart, hunger, dizziness, confusion, and irritability. As it gets worse, it can cause difficulty speaking, blurred vision, and eventually loss of consciousness. The brain depends on glucose to function, which is why the symptoms can affect thinking and coordination before they affect anything else.

One point that surprises many people: a low reading does not always come with obvious warning signs. This is called hypoglycemia unawareness, and it is more common in people who have had diabetes for many years or who have frequent lows. If you have unawareness, you cannot rely on how you feel. You need to check your blood sugar.

Why Fast-Acting Carbohydrate Is the Right First Step

Fast-acting carbohydrate raises blood sugar quickly because it is absorbed rapidly into the bloodstream. Simple sugars and refined starches break down fast and do not need much digestion. That speed is exactly what you want in a low.

This is why the first treatment is not a sandwich or a chocolate bar. Fat and protein slow digestion and delay how fast the sugar reaches your blood. A candy bar contains sugar, but the fat in it slows absorption. That delay matters when you need your blood sugar up within minutes.

A useful way to think about it: the first step is medicine, not a meal. You are treating a number, not satisfying hunger. Eat to correct the low first, then eat a proper snack or meal afterward to stabilize.

What Should I Eat If My Blood Sugar Is Low? Best Options for 15 Grams of Carbohydrate

The best options are simple, measured, and fast. The goal is roughly 15 grams of carbohydrate that will raise your blood sugar within about 15 minutes.

Common choices that provide about 15 grams of fast-acting carbohydrate include:

• 4 ounces (half a cup) of fruit juice or regular soda
• 1 tablespoon of sugar, honey, or corn syrup
• 3 to 4 glucose tablets (check the label, since tablets vary)
• 1 tube of glucose gel
• 2 tablespoons of raisins
• 1 tablespoon of table sugar dissolved in water
• About 4 ounces of skim milk

Glucose tablets and gels are worth highlighting. They are pre-measured, portable, and absorbed quickly. Many clinicians recommend keeping them on hand precisely because you do not have to estimate anything during a low, when thinking clearly is harder.

Regular soda works. Diet soda does not. This is a common and dangerous mistake. Diet drinks are sweetened without sugar and will not raise your blood sugar. Read the label if you are unsure.

Foods That Are a Poor Choice for Treating a Low

Some foods that seem like obvious choices are actually poor treatments for a low, usually because fat slows absorption or because the sugar content is too small.

These are generally not good first choices:

• Chocolate and candy bars, because fat slows sugar absorption
• Ice cream and other high-fat desserts, for the same reason
• Diet soda or drinks sweetened with non-caloric sweeteners
• A handful of nuts, which contain very little carbohydrate
• Foods with added fiber marketed as “slow release,” which by design do not act fast

Nuts and cheese are fine as part of the follow-up snack. They are not a treatment for a low on their own.

What to Eat After Your Blood Sugar Is Back in Range

Once your reading is back above 70 mg/dL, the job is not finished. Fast-acting sugar raises blood sugar quickly but can wear off quickly too, especially if the low was caused by too much insulin or certain diabetes medications. Eating a snack or meal that combines carbohydrate with protein or fat helps keep blood sugar stable.

Good follow-up options include crackers with cheese, half a sandwich, yogurt, or a small portion of a meal if it is mealtime. The point is to provide longer-lasting energy so you do not drop again shortly after.

If your next meal is more than an hour or two away, a snack is usually sensible. If you are about to eat a full meal, you may not need an extra snack. This is a reasonable general approach, though the specifics are best discussed with your own clinician, since insulin timing and medication schedules change the picture.

What If You Cannot Swallow or Are Too Confused to Eat?

If a person is unconscious, having a seizure, or cannot swallow safely, do not put food or drink in their mouth. This is a choking risk. This is a medical emergency.

In this situation, call emergency services. People with diabetes who are at risk of severe lows are sometimes prescribed a glucagon emergency kit or a ready-to-use glucagon product, which can be given by injection or nasal spray depending on the product. Family members and coworkers can be trained to use it. If a glucagon product is available and the person is unresponsive, it may be given while waiting for emergency help, following the product instructions.

This is not a situation to manage with juice or candy. Severe hypoglycemia requires emergency care.

Why Treatment Can Differ Depending on the Cause

Not all lows are the same, and the cause affects both treatment and prevention. A low from too much insulin behaves differently from a low after intense exercise or a missed meal.

Common triggers include taking too much insulin, skipping or delaying a meal, extra physical activity, and certain diabetes medications. Alcohol can also lower blood sugar, sometimes hours after drinking, because it affects how the liver releases glucose.

If you are having frequent lows, that is a signal worth acting on. Frequent lows are not simply an inconvenience. They raise the risk of hypoglycemia unawareness and severe episodes. Talk with your care team about adjusting your medication, meal timing, or monitoring. Do not change insulin doses on your own without guidance.

One clarification that matters: the 15-15 rule is designed for people treating hypoglycemia with fast-acting carbohydrate. It is not a general eating plan, and it does not apply to everyone. People without diabetes who feel shaky or hungry after skipping a meal are usually experiencing normal hunger, not clinical hypoglycemia. True hypoglycemia in people without diabetes is uncommon and warrants medical evaluation rather than self-treatment with sugar.

How to Be Prepared

Being prepared is the most reliable way to handle a low well. Keep fast-acting carbohydrate within reach at home, at work, in the car, and in a bag. Glucose tablets travel well and do not spoil quickly.

Check your blood sugar whenever you feel symptoms, and treat based on the number, not just how you feel. Teach the people around you what to do. A coworker or family member who knows where your glucose tablets are and how to use glucagon can make a real difference in a severe episode.

Carry identification that says you have diabetes. In an emergency, that information helps responders act quickly.