Fiber (Insoluble, Soluble, Total - CODEX Definition) Test

Our standard turnaround time is 10 business days for most assays. There are some assays that require a longer turnaround time. We also offer a RUSH service that is half the time of the standard turnaround time of the assay at double the cost of the assay. A few assays that we provide cannot be rushed due to the nature of the test. Please check the specific assay you are interested in regarding the ability to RUSH the turnaround time.

Sample prep and processing are critical to any analytical test to ensure the highest accuracy.

Some fiber ingredients are not very sensitive to processing, apart from the general prep dictated by the published method. Other fiber ingredients, such as RS4, are much more sensitive to sample processing than others and may require additional information for Medallion to run testing in the best way. To ensure the most accurate results for fiber testing, please carefully read and select the appropriate prompts that appear on the online submission form and we’ll take care of the rest.

Lower LOQ/LOD for our Dietary Fiber tests are 0.1% w/w, i.e., 0.1g Fiber per 100g sample.

We take the quality and accuracy of our results seriously. In the lab, one part of our quality system is to have carefully controlled samples that we run with each testing batch. These samples have known and set limits for fiber content that is monitored with every round of testing. Other equipment is routinely calibrated and examined before and during testing, and equipment is maintained and cleaned on a regular basis.

Besides equipment, our scientists are thoroughly trained on the methods and must pass proficiency testing, training, and competency in a method before allowing testing to be conducted.

Outside of the specific lab team, Medallion is ISO/A2LA Accredited across many of our testing, including several dietary fiber tests.

There are several factors that need to be considered when choosing the ‘best’ fiber method for your product. Regulations and the source of dietary fiber tend to be the top reasons for choosing a method. Many of the newer fiber methods are better able to capture fiber ingredients that are missed in traditional fiber tests, such as polydextrose or fructans/inulin. However, the newer methods tend to have more complex procedures and have a higher cost.

We have a blog post that goes over selecting the best fiber method for your sample, and as always, you can reach out to Customer Service if you need help.

Dietary Fiber methods tend to be very robust and allow for a very wide range of sample types to be tested. However, there are several ingredients that need extra attention for Medallion to accurately test them. Some examples include: Stevia, High Fat Content, RS4 Fiber, and Psyllium. We have prompts on our online submission form to help ensure that we have everything set up correctly, and it is very important to read and select the prompts that apply to your product.