Can Old Test Strips Give False Readings

Can Old Test Strips Give False Readings?

Welcome to, your trusted ally in managing diabetes. In addition to facilitating the selling of unused diabetic supplies, we’re committed to providing you with essential information about diabetes management. 

A common question among our community is whether old or expired test strips can give false readings. Let’s discuss this topic to help you manage your diabetes more effectively.

The Influence of Test Strip Age on Blood Glucose Readings

Test strip integrity is pivotal for reliable blood glucose monitoring. When test strips age beyond their expiry date or are stored incorrectly, their efficiency may be compromised. Here’s how:

Degradation of Reactive Agents: The chemicals or enzymes in test strips react with glucose to give a reading. With time, these reactive agents can degrade, affecting the accuracy of the readings.

Impact of Storage Conditions: Exposing test strips to extreme temperatures, light, or humidity can speed up the degradation of reactive agents, leading to inaccurate results.

Physical Damages: Any form of physical damage to the strips can also affect their performance.

Scientific Evidence of the Risks

Studies have confirmed that expired test strips can indeed lead to less accurate readings. According to a study in the Journal of Diabetes Science and Technology, a substantial number of test strips tested beyond their expiration date failed to meet accuracy standards. 

This finding underscores the importance of using test strips within their expiration date for reliable diabetes management.

Can Old Test Strips Give False Readings

The Danger of False Readings

Inaccurate glucose readings can pose significant risks for people managing diabetes. Overestimation can lead to unnecessary insulin doses, resulting in hypoglycemia (low blood sugar). 

On the other hand, underestimation might delay necessary treatment, leading to hyperglycemia (high blood sugar). Both scenarios can have severe health implications.

What Can You Do With Old or Unused Test Strips?

Finding a solution for expired or soon-to-expire strips can seem daunting. However, a few steps can ensure they don’t interfere with your diabetes management:

Check Expiration Date: Always check the expiration date before using a test strip. Never use a strip past its expiration date.

Proper Storage: Store your strips in a cool, dry place away from sunlight. Never store them in the bathroom, kitchen, or car where temperatures can fluctuate.

Sell Unused Supplies: If you have unexpired, unused diabetic supplies, consider selling them on You can earn money, and the supplies reach those who need them.


In conclusion, old or expired test strips can indeed give false readings, potentially impacting your diabetes management. It’s essential to use test strips within their usage period and store them appropriately for accurate results. 

At, we are here to assist you, providing a platform to sell your unused diabetic supplies or offering helpful advice on managing diabetes. Always consult with your healthcare provider for personalized advice on diabetes management.

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