If your blood sugar is low, eat 15 grams of fast-acting carbohydrates immediately. Good options include 4 to 5 glucose tablets, 2/3 cup of fruit juice or regular soda, a tablespoon of honey, or 6 hard candies like Life Savers. After eating, wait 15 minutes and check again. If your levels are still low, repeat with another 15 grams.
How to Recognize Low Blood Sugar
Blood sugar below 70 mg/dL is considered low. Your body sends early warning signals: sweating, a racing heartbeat, shaking hands, anxiety, and sudden hunger. These symptoms come from your nervous system reacting to the drop, and they’re your cue to act fast.
If blood sugar continues falling, especially below 54 mg/dL, the brain starts running short on fuel. That shows up as confusion, difficulty concentrating, irritability, and trouble speaking or walking normally. At this stage, you may need someone else’s help to treat the episode safely.
The 15-15 Rule
The standard approach is simple: eat 15 grams of fast-acting carbohydrate, then wait 15 minutes. If you don’t feel better or your blood sugar is still under 70 mg/dL, eat another 15 grams. You can repeat this cycle until your levels come back up.
The key word here is “fast-acting.” You want simple sugars that hit your bloodstream quickly, not foods that take a long time to digest. Liquid carbohydrates like juice tend to raise blood sugar faster than solid foods because liquids leave your stomach more quickly. A glucose drink can peak in your blood in roughly 40 minutes, while the same amount of sugar eaten alongside solid food takes considerably longer.
Best Fast-Acting Foods for 15 Grams of Carbs
- Glucose or dextrose tablets: 4 to 5 tablets. These are the top choice because they contain pure glucose and work predictably.
- Fruit juice or regular soda: 2/3 cup (about 150 mL). Make sure it’s not diet or sugar-free.
- Honey: 1 tablespoon.
- Table sugar: 1 tablespoon or 3 packets dissolved in water.
- Hard candy: 6 pieces of something like Life Savers.
Glucose tablets are worth keeping in your bag, car, or nightstand if you experience low blood sugar regularly. They deliver a precise dose, they don’t spoil, and they work faster than most food options. Juice boxes are another portable choice since they come in pre-measured servings.
What Not to Eat During an Episode
Chocolate bars, peanut butter, cheese, and other foods high in fat or protein are poor choices in the moment. Fat slows digestion significantly, which delays the sugar from reaching your bloodstream. A candy bar might seem logical, but the fat content means your blood sugar will take much longer to recover compared to a glass of juice or a few glucose tablets.
Diet soda, sugar-free candy, and artificially sweetened drinks won’t help at all since they contain no actual sugar. Double-check labels if you’re grabbing something in a hurry.
What to Eat After Your Blood Sugar Recovers
Once your blood sugar is back above 70 mg/dL, you’re not done. The fast-acting sugar you just ate will burn through quickly, and without a follow-up snack, your levels can drop right back down. This is where slower-digesting foods come in.
Eat a small snack or meal that combines complex carbohydrates with protein and some healthy fat. This combination slows digestion and creates a gradual, sustained rise in blood sugar instead of another sharp spike and crash. Nuts are one of the easiest options because they deliver all three in a single food. A handful of almonds with a piece of whole grain toast, Greek yogurt with some oatmeal, or half a sweet potato with a hard-boiled egg all work well.
Good complex carbohydrate choices include brown rice, quinoa, oatmeal, sweet potatoes with the skin, sprouted grain bread, and legumes like lentils or black beans. Pair these with a protein source like eggs, cottage cheese, lean meat, tofu, or fish. For healthy fats, think olive oil, avocado, or the fat already present in nuts and seeds like chia or ground flax.
When Eating Isn’t Enough
Sometimes the 15-15 rule doesn’t bring your blood sugar back up, or the situation is too serious for food to help. If you’re becoming confused, feel like you might pass out, can’t swallow safely, or lose consciousness, this is a medical emergency.
Glucagon, a hormone that signals your liver to release stored sugar, is available as an injectable kit or nasal spray. If you take insulin or a medication that can cause low blood sugar, having glucagon on hand and making sure the people around you know how to use it can be lifesaving. Someone should call 911 if glucagon isn’t available or if you don’t respond to it.
People who are unconscious or unable to swallow should never have food or liquid placed in their mouth due to the risk of choking. Glucagon or emergency medical care are the only safe options at that point.