High blood sugar comes down through a combination of movement, food choices, hydration, and, for many people, medication. A fasting blood sugar of 126 mg/dL or higher falls into the diabetes range, while a reading of 200 mg/dL or more two hours after eating signals the same. Whether you’re dealing with an occasional spike or persistently elevated numbers, the strategies below work on the actual mechanisms that control glucose in your body.
Move Your Body to Pull Sugar Out of Your Blood
Exercise is the fastest tool you have that doesn’t come from a pharmacy. When your muscles contract, they pull glucose directly out of your bloodstream for fuel. This happens through a transport process that works independently of insulin, which is why physical activity lowers blood sugar even when your body isn’t responding well to insulin on its own. Your muscles essentially open a side door for glucose that bypasses the usual hormonal pathway.
A brisk walk after a meal is one of the simplest interventions. Even 15 to 30 minutes of moderate activity like walking, cycling, or swimming can noticeably reduce a post-meal spike. For longer-term control, regular exercise improves your body’s sensitivity to insulin for hours or even days after a workout, meaning your baseline blood sugar levels gradually improve with consistent activity. Resistance training (lifting weights, using resistance bands) is especially effective because building muscle mass creates more tissue that can absorb glucose around the clock.
If your blood sugar is above 250 mg/dL and you have type 1 diabetes or are prone to a condition where the body produces dangerous levels of acids, check with your care team before exercising. In that specific scenario, intense activity can sometimes push blood sugar higher rather than lower.
Eat for a Lower Glucose Response
What you eat matters, but so does how much of it converts to sugar and how fast. Two concepts help here. The glycemic index (GI) scores foods from 0 to 100 based on how rapidly they raise blood sugar, with pure glucose at 100. But the glycemic index only tells part of the story. Watermelon, for example, has a high GI of 80, yet a typical serving contains so little carbohydrate that its real-world impact on blood sugar is small. That real-world measure is called glycemic load, which accounts for both speed and quantity of glucose per serving. A glycemic load of 5, like that watermelon serving, is low.
In practical terms, this means you should pay attention to both the type of carbohydrate and the portion size. Some high-impact swaps:
- White bread or white rice can be replaced with whole grain bread, brown rice, or quinoa, all of which release glucose more slowly.
- Sugary drinks are among the fastest ways to spike blood sugar. Water, unsweetened tea, or sparkling water eliminates that spike entirely.
- Pairing carbs with fat, protein, or fiber slows digestion. An apple with peanut butter raises blood sugar less dramatically than an apple alone.
You don’t need to eliminate carbohydrates. You need to choose ones that release glucose gradually and eat them alongside foods that slow absorption. Vegetables, legumes, nuts, and whole grains consistently produce smaller blood sugar responses than refined or processed carbohydrates.
Drink More Water
When blood sugar is elevated, your kidneys work to filter the excess glucose and excrete it through urine. Staying well hydrated supports this process by helping your kidneys flush glucose out more efficiently. Dehydration does the opposite: it concentrates glucose in a smaller volume of blood, making readings appear even higher and reducing your kidneys’ filtering capacity.
Plain water is the best choice. There’s no magic volume, but consistently drinking throughout the day rather than waiting until you’re thirsty keeps things moving. If your blood sugar is running high and you notice you’re urinating more frequently than usual, that’s your body already trying to dump excess glucose. Replacing that lost fluid is important to avoid a cycle of dehydration and worsening readings.
How Medication Lowers Blood Sugar
For people with diabetes or prediabetes that doesn’t respond sufficiently to lifestyle changes, medication fills the gap. The most commonly prescribed first-line medication works by reducing the amount of glucose your liver releases into your bloodstream. Your liver constantly produces and stores glucose, releasing it between meals. This medication dials that production down, which lowers fasting blood sugar in particular.
Other medications work through different pathways: some stimulate your pancreas to produce more insulin, others slow carbohydrate digestion in the gut, and a newer class causes your kidneys to excrete more glucose through urine. Insulin itself, whether injected or delivered by a pump, directly enables your cells to absorb glucose from the blood. People with type 1 diabetes always need insulin. Many people with type 2 diabetes eventually need it as well, though oral medications and lifestyle changes are typically tried first.
If you’re already on medication and your blood sugar is still running high, the dose or type may need adjustment. Consistency matters too. Taking medication at the same time each day, especially in relation to meals, produces more stable results than sporadic dosing.
Vinegar Before Meals: What the Evidence Shows
Apple cider vinegar has a modest but real effect on post-meal blood sugar. In a study published in Diabetes Care, consuming vinegar before a high-carbohydrate meal reduced the blood sugar response by nearly 20% compared to a placebo. The likely mechanism is that the acetic acid in vinegar slows gastric emptying, meaning food leaves your stomach more slowly and glucose enters your bloodstream at a more gradual pace.
This isn’t a substitute for other interventions, but a tablespoon or two of vinegar diluted in water before a carb-heavy meal is a low-risk addition to your routine. Undiluted vinegar can erode tooth enamel and irritate your throat, so always dilute it.
Track Your Numbers to Find Patterns
Blood sugar management improves dramatically when you can see how your body responds to specific foods, activities, and timing. A standard glucose meter with finger-prick testing gives you snapshots. Continuous glucose monitors (CGMs) give you the full picture, tracking your levels every few minutes and displaying trends on your phone.
The current target for most people using a CGM is to spend at least 70% of the day with blood sugar between 70 and 180 mg/dL. That translates to roughly 17 out of 24 hours in range. Your specific target may differ depending on your situation, but that 70% benchmark is a useful starting point for gauging whether your overall strategy is working.
Even without a CGM, testing before and two hours after meals reveals which foods cause the biggest spikes. Many people are surprised to find that certain “healthy” foods like fruit juice, instant oatmeal, or granola bars produce sharp glucose responses, while foods they expected to be problematic, like full-fat yogurt or cheese, barely move the needle.
Sleep, Stress, and the Hormones That Raise Glucose
Poor sleep and chronic stress both raise blood sugar through hormonal pathways that have nothing to do with food. When you’re sleep-deprived, your body becomes less sensitive to insulin, and stress hormones like cortisol signal your liver to release more glucose as part of the fight-or-flight response. This is why some people see elevated morning readings even when they haven’t eaten anything overnight.
Getting 7 to 8 hours of sleep and finding ways to manage stress (physical activity, breathing exercises, reducing commitments) can meaningfully lower blood sugar over time. These aren’t soft lifestyle suggestions. They directly affect the hormones that regulate glucose production and uptake.
When High Blood Sugar Becomes an Emergency
Most high blood sugar can be managed at home with the strategies above. But certain symptoms signal a dangerous escalation that requires immediate medical attention. Watch for a rapid or weak pulse, nausea, deep sighing breaths, confusion, fruity-smelling breath (often described as smelling like nail polish), flushed and dry skin, or unsteady walking. These can indicate diabetic ketoacidosis or a hyperosmolar state, both of which can progress to loss of consciousness.
If you or someone around you shows these signs, especially combined with a blood sugar reading well above 300 mg/dL, that’s an emergency room situation, not a “drink some water and go for a walk” situation. Acting quickly matters.