FDA Class I Recall for Some FreeStyle Libre 3 Sensors: What People With Diabetes Should Do Now

If you use a FreeStyle Libre 3 or FreeStyle Libre 3 Plus sensor, this is worth checking now.

On February 4, 2026, the Food and Drug Administration classified Abbott’s action for certain FreeStyle Libre 3 and FreeStyle Libre 3 Plus sensors as a Class I recall, the agency’s most serious recall category. The problem is not that all Libre devices are being pulled. The issue is that some sensor lots may show glucose readings that are lower than a person’s actual blood sugar.

That matters because a false low can push someone to make the wrong decision. A person might eat extra carbohydrates they do not need, or skip or delay insulin when insulin is actually needed. The FDA says serious injury or death is possible, which is why the recall classification is so important.

What is affected, and what is not

The recall applies only to certain lots of:

FreeStyle Libre 3 sensors
FreeStyle Libre 3 Plus sensors

FreeStyle Libre 3 readers and mobile apps are not part of this recall. Other Libre products are also not included, including FreeStyle Libre 14 day, FreeStyle Libre 2, FreeStyle Libre 2 Plus, Libre Pro sensors, and Abbott biowearables.

In other words, this is not a recall of every Libre product. It is limited to certain sensor lots in the Libre 3 and Libre 3 Plus lines.

Why falsely low readings are risky

Continuous glucose monitors, or CGMs, help people make day-to-day treatment decisions. When a sensor reads lower than the true glucose level, the number on the screen can be misleading even if the person is not actually low.

That can lead to problems such as:

eating or drinking fast-acting sugar when it is not needed
reducing, skipping, or delaying insulin
making dosing choices based on the wrong number
missing a rising glucose level that actually needs attention

CGM systems are a major part of modern diabetes care, but they still require a backup plan. When the number on the sensor does not fit your symptoms or what you would expect, it is important to confirm with a fingerstick blood glucose meter or, if you use the FreeStyle Libre 3 Reader, the built-in meter.

How to check whether your sensor is affected

Do not assume your sensor is fine just because it is working. The FDA says people should verify whether their current or unused sensors are part of the affected lots.

Find the sensor serial number.
You can look for it in the app, in the reader, on the bottom label of the sensor applicator, or on the carton.
Use the FreeStyleCheck.com serial-number checker to confirm whether that specific sensor is affected.
If the tool says the sensor is affected, stop using it right away.
Dispose of the sensor and request a replacement at no cost.

Abbott says replacements are available for affected sensors. The company also says it identified and resolved the manufacturing issue behind this action. Even so, the practical message for users is simple: check your serial number instead of guessing.

What to do if your reading does not match how you feel

This is the most useful safety step for many readers.

If your CGM says you are low, but you do not feel low and the reading seems off, confirm with a blood glucose meter before making a treatment decision. The same applies if you feel low but the sensor does not seem to reflect that.

For people using the FreeStyle Libre 3 Reader, the FDA says the built-in meter can be used for treatment decisions when sensor readings do not match symptoms or expectations.

This is not a reason to ignore symptoms. It is the opposite. Symptoms still matter. If your body is telling you something is wrong, use a meter to verify the number as soon as you can.

Symptoms of low blood sugar to watch for

Low blood sugar, also called hypoglycemia, can feel different from person to person. Common warning signs include:

shakiness
sweating or clamminess
feeling anxious or nervous
confusion
fast heartbeat
dizziness or lightheadedness
hunger
weakness or low energy
blurred vision
tingling or numbness around the lips, tongue, or cheeks

In severe cases, hypoglycemia can lead to seizures or loss of consciousness. If someone cannot safely swallow, is having a seizure, or is unresponsive, this is an emergency.

A basic reminder on treating a suspected low

General diabetes safety guidance says to treat a low blood sugar at 70 mg/dL or below with the 15-15 rule: take 15 grams of fast-acting carbohydrate, wait 15 minutes, then recheck.

If the glucose is still below 70 mg/dL, or not clearly moving up, repeat with another 15 grams of fast-acting carbohydrate.

If you have symptoms of a low and cannot check right away, general guidance says to treat the suspected low first and confirm as soon as you can.

Examples of fast-acting carbohydrate can include glucose tablets, glucose gel, or about 4 ounces of juice or regular soda. Children may need different amounts, so families should follow their diabetes care plan.

This is general safety information, not a personalized treatment plan. If you have frequent lows, hypoglycemia unawareness, pregnancy, use an insulin pump, or are not sure how to handle a mismatch between symptoms and device readings, contact your diabetes clinician for individualized advice.

How to get help and report problems

If your sensor is confirmed as affected, stop using it, dispose of it, and request a no-cost replacement through the serial-number checker or Abbott customer support.

You should also report device problems if you had an incorrect reading, a quality problem, or a harmful event linked to a sensor. Problems can be reported to Abbott and to the FDA’s MedWatch safety reporting program. Reporting helps regulators and manufacturers track injuries, spot patterns, and improve safety actions.

What this means for readers

This recall is serious, but it is also actionable.

If you use a FreeStyle Libre 3 or Libre 3 Plus sensor, check the serial number now. If a reading seems too low for how you feel, confirm with a blood glucose meter before acting on it. Keep fast-acting carbohydrates available, know the warning signs of hypoglycemia, and replace affected sensors promptly.

The main point is not to panic. It is to verify, confirm, and use a backup check when the number on the screen does not fit the real-life picture.

Sources

This article is for general informational purposes only and is not medical advice. Research findings can be early, limited, or subject to change as new evidence emerges. For personal guidance, diagnosis, or treatment, consult a licensed clinician. For current outbreak or public health guidance, follow your local health department, the CDC, or another relevant public health authority.