Control Solution: What It Is and When You Should Use It

If you've ever opened a blood glucose meter kit and found a small bottle labeled 'control solution,' you might have wondered what it's actually for. You're not alone — it's one of the most overlooked tools in diabetes management. Understanding how to use a diabetes control solution with your glucose meter can make a real difference in how confidently you manage your health.

What Is Diabetes Control Solution?

Control solution is a liquid that contains a known, fixed amount of glucose. It's used to test whether your glucose meter and test strips are working correctly — not to test your actual blood sugar.

• It mimics a blood sample so your meter can be tested safely

• It comes with a target range printed on your test strip vial or meter manual

• It is not meant to be used on your body

• Most meters have a specific control solution designed for that brand

Why Accurate Glucose Readings Matter

When your meter gives you inaccurate readings, it can affect the decisions you make about food, insulin, and medication. Even small errors can add up over time and impact your overall diabetes management. Using control solution regularly helps you catch problems before they affect your care.

When Should You Use Control Solution?

Many people only reach for control solution when something feels off, but there are several key moments when it should be part of your routine. Building these habits helps ensure every reading you take is one you can trust.

• When you open a new box of test strips

• If you drop your meter or it gets wet

• When your readings don't match how you feel

• If your meter has been stored in extreme heat or cold

• After the meter has not been used for a long period of time

How to Use Control Solution Step by Step

Using control solution is simple and takes just a minute or two. Follow the same steps you would for a regular blood sugar test, but use the control solution instead of a blood sample.

• Wash and dry your hands before starting

• Insert a test strip into your meter as usual

• Apply a small drop of control solution to the strip just like you would blood

• Wait for the result and compare it to the target range on your test strip vial

• If the result falls within range, your meter and strips are working correctly

What to Do If Your Results Are Out of Range

If your control solution test result falls outside the printed target range, don't panic — but do take action. Start by checking the expiration date on both the control solution and your test strips. If everything looks fine and results are still off, it may be time to replace your strips or contact your meter's manufacturer.

How Often Should You Test With Control Solution?

There is no single universal rule, but most diabetes educators recommend testing whenever you open a new vial of strips or suspect something might be wrong. Some people choose to run a control test once a month as part of their regular routine. The key is consistency — make it a habit so it becomes second nature.

Shop Diabetes Supplies at MDS Diabetes

At MDS Diabetes, we carry a wide selection of glucose meters, test strips, and control solutions to help you manage your diabetes with confidence. Visit us at mdsdiabetes.com or give us a call at (877) 861-3571 — our friendly team is ready to help you find exactly what you need.