How Can I Lower My A1C? Doctors Share Simple Daily Habits That Work Fast

If your last blood test came back with an A1C number that’s creeping up, you’re probably wondering what you should do next. Nearly half of American adults are flirting with or already have type 2 diabetes—which means a lot of us are asking the same question: How can I lower my A1C, and how fast can I really see a difference? The good news is that doctors and dietitians say meaningful improvement in your blood sugar levels is possible in just a few months, often without medication.

What’s a normal A1C level?

Think of A1C as a report card for your blood sugar, not a snapshot. “The A1C test (also known as hemoglobin A1C or HbA1C) is a blood test that estimates your average blood glucose levels over the past three months,” explains Neha Lalani, MD, CEO of Bluebonnet Diabetes & Endocrinology. It works by measuring the percentage of hemoglobin in your red blood cells that has sugar attached to it, she explains.

Because red blood cells live for about three months, the test shows a bigger picture than a single fasting glucose reading ever could. Here’s how the target A1C numbers break down:

• Below 5.7 percent: normal
• 5.7 to 6.4 percent: prediabetes
• 6.5 percent or higher: diabetes

A1C also tends to rise about 0.1 percent per decade as we age, even in people without diabetes, according to Cory Rice, DO, chief clinical advisor at Biote. Postmenopausal women in particular tend to see higher readings, thanks to the drop in estrogen that affects insulin sensitivity.

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How can I lower my A1C? 5 changes that work

Research is encouraging: In one 12-week study of 590 people published in the Journal of Diabetes, participants lowered their A1C by an average of 0.5 to 2.5 percent through diet, education and regular physical activity alone. Those who started with the highest numbers saw the biggest drops. Here’s where to focus to reach your A1C goals and improve your overall health in the process.

Rethink your plate, not your carbs

You don’t need to banish bread forever. Ali McGowan, MS, RD, LDN, a Rhode Island-based registered dietitian, recommends the Diabetes Plate Method: Fill half your plate with non-starchy vegetables, a quarter with lean protein and a quarter with high-fiber carbs. “It helps keep blood sugar steady without tracking every bite,” she says.

Add the foods that lower A1C fastest

Some grocery-store staples pack a real punch when it comes to blood sugar control. Beans, chickpeas and lentils have been shown in a landmark JAMA trial to lower A1C more than a whole-wheat-heavy diet. Strawberries improved A1C, insulin resistance and inflammation in one University of Nevada study when adults with prediabetes ate about 2.5 cups a day for 12 weeks.

And psyllium fiber may be the single most powerful food-based fix: 10 grams a day reduced A1C by an average of 0.75 percent in as little as three months, according to a 2024 BMC Endocrine Disorders analysis. “Its soluble fiber forms a gel in your digestive system that slows sugar absorption,” says Toni Isabella, RN, BSN, CDCES, who manages the MOLLY Diabetes Center at Hackensack University Medical Center. She adds that diet is your most powerful tool for lowering A1C.

Walk right after meals

You don’t need a gym membership to move the needle when it comes to bringing down your average blood sugar levels. “One simple daily tip is to take a 15 to 20 minute walk as soon as you’re done with a meal,” says Simran Malhotra, MD, a lifestyle medicine physician. A review in Sports Medicine confirms that a post-meal stroll helps blunt the blood sugar spike—but walking before a meal doesn’t have the same effect.

Not feeling especially motivated to stroll? Choose a podcast you love and only listen to it while walking. Tip: Pop in a pair of wireless earbuds like the Skullcandy Push 720 Open, which allow you to listen to whatever you have cued up while still taking in the ambient sounds around you (like a car horn honking) so you stay safe on your stroll. 

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Pick up some weights

Strength training two to three times a week lowered A1C by about 0.4 percent more than not lifting, according to a review in BMJ Open Diabetes Research & Care. Resistance work helps your muscles pull glucose out of your bloodstream more efficiently, Dr. Malhotra says.

Protect your sleep

Skimping on rest really does sabotage blood sugar in the long term. “Chronic sleep deprivation and poor sleep quality can have a major impact on our blood sugar and increase risk of insulin resistance and diabetes over time,” Dr. Malhotra says. Aim for a consistent bedtime, screen-free wind-downs and a cool, dark bedroom.

How quickly can you lower your A1C?

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Because A1C reflects two to three months of blood sugar, you won’t see changes overnight. But experts agree that steady daily habits can show up on your very next test, sometimes by as much as 2.5 percent. “Consistent lifestyle changes, even small ones, can have a meaningful impact on your A1C and overall metabolic health,” Dr. Lalani says.

If lifestyle tweaks aren’t enough, medications like metformin can lower A1C by an average of 0.5 to 1.25 percent, so talk with your doctor about the right combination for you. Either way, the number on that next lab slip really can move—and faster than you think.

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