Blood Glucose Test Strips for Monitor System, Red-Yellow, (50 pieces)

They work just fine !

Back in December, I wanted to start testing my blood glucose daily. After a bit of research,I purchased a Contour Next EZ Diabetes Testing Kit as it was rated the most accurate. However, I could not get the hang of getting enough of a blood sample to make it work. So, I purchased an Abbott Freestyle Lite test kit at my local pharmacy as it was #2 in that list. With the Freestyle Lite, it seemed to have a better lancet device and the test strips allowed easy (and seemingly small!) blood samples. All was good. Then, I purchased my first batch of Freestyle test strips from Amazon. I noticed the different coloring and the "not for sale in the US" or imported from the EU (European Union) or Ireland notice on the test strip bottle. I purchased two of them and, given the price, I thought I'd use them and see where things went. However, I saw comments that they were not accurate. So, being an engineer and not afraid of Excel, I decided to compare the two. I purchased another test strip bottle at the local pharmacy. What the heck, I added the Contour into the test. First, I would periodically test all with their manufacturer's test solutions. All were within their limits. (It bugs me that not all manufacturer's solution work with manufacturer's devices. Some solutions do seem to work across manufactures but others not. The Contour seems more sensitive requiring its own...) My methods: each morning, I laid out three sets of each test strip: Free stylepharmacy, Contour, and Freestyle Amazon purchased. Clean hands with soap and warm water. Select and clean (alcohol wipe) a finger (based on my spreadsheet), ensure it was dry, using only the Freestyle lancet, and started poking. Carefully take a sample with the pharmacy-purchased Freestyle and immediately with the Contour from the same poke, if possible (I finally figured out how to do them). I noted the results on a spreadsheet (each row had data, finger, 3 pharmacy-purchased results, 3 Amazon-purchased results, and 3 Contour results). I worked to get samples quickly. Sometimes additional pokes with the lancet was required. I would pull and discard the test strip with one hand and then replace with a new one with the other so as not to risk contaminating the test strips. I did this for three months. I added averages and standard deviations. Twice, over the last two months, I had blood draws from LabCorp. The first time, I went to the parking lot and took samples within 10 seconds for all three sets of test strips. The second time (earlier this week), I only tested the pharmacy Freestyle and the Contour but I also worked with the phlebotomist / lab tech to get a sample directly from her blood draw but also took a normal finger poke in the parking lot. I used the pharmacy-purchased Freestyle as the base for comparisons among the strips. So, here are MY observations. First, the pharmacy Freestyle test strips showed the least variation across samples taken (remember, 3 samples of with each kind of strip were taken every morning). Contour was the most consistent results: Contour average of daily standard deviations of 3.9; Freestyle1 pharmacy-purchased Freestyle average of daily standard deviations of 5.0; Freestyle1 Amazon-purchased Freestyle average of daily standard deviations of 5.4. When compared with the pharmacy-purchased Freestyle strips, the Amazon purchased were within %2.8 of the pharmacy purchased and the Contour was within %8.8 of the pharmacy purchased Freestyle strips. When comparing the differences between my glucose meter readings LabCorp testing, when samples were taken directly from the LabCorp injection site, the pharmacy-purchased Freestyle Lite was within %4 and the Contour with %9.6. When the LabCorp results were compared to finger-stick taken within 10 minutes, the pharmacy-purchased Freestyle Lite was within %2.8, the Amazon-purchased Freestyle Lite strips were within %13, and the Contour were within %5.5. My conclusion is that the both devices and all the strips were within the %15 range required for glucose meters. Further more, the Freestyle lite pharmacy-purchased strips was the most accurate though had a little more variation within the range of being accurate. The the Amazon-purchased strips results were fine. While the Contour were more consistent, they seemed to fall in between the pharmacy-purchased Freestyle strips and the Amazon-purchased Freestyle strips..

I have used these for years and am grateful they are on Amazon for easy receiving! Price good also.

Works with Libre Freestyle Lite. Had a hard time getting them at the pharmacy, because the doctor screwed up the script. Didn't require one for Amazon and the price was comparable to the pharmacy. Delivered quickly.

Using them for years without any issues. Would highly recommend to all.

Finally received 2 days late. Thank you.

Fast service. I had these 24 hours after my order. Strips are accurate and easy to use.

They sent me testing strips for the United Kingdom and Canada and it doesn't work well with the American meters from what I've read online so I sent it back through Amazon full refund