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Fiber

Dietary Fiber

Medallion Labs has been a leader in fiber testing since we opened for business over 40 years ago. Not only do we provide superior testing capabilities to our customers and assist with interpretation of results, but we have consistently been involved with developing and validating the necessary, state of the art, methods for testing.

We offer comprehensive testing options for fiber determination of a product. In addition to determining the dietary fiber content of foods and food products, these tests can be used to determine purity of a fiber ingredient and often can be used to determine the recovery of a fiber ingredient after it has been incorporated into a food product (i.e. a measure of control of the production process, or the stability of the fiber ingredient in the product during processing). Ultimately, this information provides the data you need for substantiating claims and labeling your product.

The term “dietary fiber” was coined in 1953 as a broader definition than the crude fiber of animal nutrition. In 1976, the dietary fiber definition was broadened to include all indigestible dietary polysaccharides in addition to the other fiber components. The traditional methods for determining total dietary fiber quantitate most of the dietary fiber in foods; however, as additional sources of dietary fiber were studied, additional specialized methods were adopted. As the science has evolved and more specialty fibers are being used, the need for an updated method for total dietary fiber to include all components was readily apparent. A method designed to match the Codex Alimentarius Definition of Fiber was approved by AOAC International (AOAC 2009.01). AOAC 2009.01 uses an enzyme digest protocol more consistent with the human digestive system and utilizes liquid chromatography to quantify low-molecular weight soluble dietary fibers (resistant oligosaccharides).

Fiber Analysis Chart

Below is a list of the fiber tests Medallion Labs currently offers. Please click on the test for more information. If there is an analysis not listed or for further information please call 1-800-245-5615.

AOAC Method Values Reported Why Choose This Test Please Note:
Total Dietary Fiber
991.43 Total Dietary Fiber (TDF) (includes all soluble and insoluble fiber plus ~15% of any inulin that is in the product) Support dietary fiber claims. If you have inulin in your product and you do NOT want it included in the reported value for TDF then please indicate this prior to testing.
Total, Soluble & Insoluble Dietary Fiber
991.43 Total Dietary Fiber (TDF), Soluble Fiber, and Insoluble Fiber (plus ~15% of any inulin that is in the product) Support dietary fiber claims and calorie claims adjusted for insoluble fiber. If you have inulin in your product and you do NOT want it included in the reported values for TDF or Soluble Fiber then please indicate this prior to testing.
Total Dietary Fiber (CODEX Definition)
2009.01 Total Dietary Fiber (TDF)(includes all soluble and insoluble fiber including low-molecular weight soluble dietary fibers (resistant oligosaccharides)). Support dietary fiber claims. Uses digest conditions more similar to human digestion. This test captures low molecular weight soluble fibers that are not recovered by the traditional dietary fiber method. Please note this test will provide you with only a TDF number.
Total, Soluble, & Insoluble Dietary Fiber (CODEX Definition)
2011.25 Total Dietary Fiber, Soluble Fiber, and Insoluble Fiber Support dietary fiber claims. Uses digest conditions more similar to human digestion. This test captures low molecular weight soluble fibers that are not recovered by the traditional dietary fiber method. This tests reports a soluble fiber value that includes both the ethanol precipitated soluble fiber and the low molecular weight soluble fiber combined.
Total Dietary Fiber with Resistant Oligosaccharides
2001.03 + 991.43 Total Dietary Fiber (includes all soluble and insoluble fiber) AND Resistant Oligosaccharides Support dietary fiber claims in products that contain significant amounts of resistant oligosaccharides. If you have inulin in your product and you do NOT want it included in the reported values for Resistant Oligosaccharides and TDF then please indicate this prior to testing.
Total, Soluble, & Insoluble Dietary Fiber with Resistant Oligosaccharides
2001.03 + 991.43 Total Dietary Fiber, Soluble Fiber, and Insoluble Fiber AND Resistant Oligosaccharides Support dietary fiber claims and calorie claims adjusted for insoluble fiber in products that contain significant amounts of resistant oligosaccharides. If you have inulin in your product and you do NOT want it included in the reported values for Resistant Oligosaccharides, TDF or Soluble Fiber then please indicate this prior to testing.
β-Glucan
995.16 β-Glucan Support Beta-Glucan based claims, such as heart health for oat and barley products.  
Fructans (Fructooligosaccharides)
997.08 Fructans Track accuracy of formulation, processing losses or other formula issues on samples containing fructan ingredients. If you have fructans or psyllium in your product and you do NOT want it included in the reported values for TDF then please indicate this prior to testing.
Polydextrose
2000.11 Polydextrose Check the accuracy of formulation, processing losses or other formula issues on samples containing added polydextrose ingredients. Samples must be accompanied by the following information:

1. An estimate of the polydextrose content in your sample. Samples without estimates will require a longer turn around time.

2. A 25 gram sample of the pure polydextrose ingredient present in your sample. If this polydextrose standard is not made available to us, we can only use our in-house standards. If we have your brand available, our lot numbers may not match those of the ingredients used, which could cause results to vary significantly.

3. A Certificate of Analysis (COA) for that lot number that includes moisture. Samples without moisture content will require a longer turn-around time.
Resistant Starch (RS2 and RS3 only)
2002.02 Resistant Starch Screen ingredients as this resistant starch does not necessarily relate to final dietary content of foods and food products. This method measures RS2 (granular) and RS3 (retrograded) starches. RS1 starches are not detected by this method. Applicability of this method to RS4 (chemically cross-linked) type starches must be determined on a case by case basis.
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