How to compare tomato pomace analysis and fiber values

Start with the reporting basis

Tomato pomace analysis is only comparable when you know whether each value is reported as-fed or on a dry-matter basis. As-fed values describe the ingredient in the condition tested, including its moisture. Dry-matter values remove the effect of water, making it easier to compare the nutrient composition of materials with different moisture levels.

The conversion depends on the sample’s dry-matter fraction. To convert an as-fed nutrient value to a dry-matter basis, divide it by the dry-matter fraction. To convert a dry-matter value to an as-fed basis, multiply it by that fraction. For example, a moisture result is needed to determine the dry-matter fraction; do not compare two protein or fiber values until their basis is clear.

A moisture difference can make an as-fed nutrient value appear lower even when the dry portion has a similar composition. This matters for both formulation and delivered-quantity comparisons: water contributes to the received weight but not to the ingredient’s dry matter. Keep the stated basis beside every number in your comparison sheet.

Ask which fiber method was used

“Fiber” is not one interchangeable measurement. Crude fiber and detergent-fiber measures describe different analytical fractions, so values produced by different methods should not be treated as directly equivalent. In feed analysis, neutral detergent fiber (NDF) and acid detergent fiber (ADF) are common measures; crude fiber is another method and does not report the same fraction as either one.

The method affects how the result can be interpreted in a formulation. NDF and ADF separate fiber fractions using different analytical steps, while crude fiber is determined by a distinct procedure. A larger number from one method does not automatically mean that a lot has more of the same measurable fiber than a smaller number from another method.

When a report says only “fiber,” request the full test name or method and retain it with the result. Compare like with like: same named method, same reporting basis, and a clearly identified sample. If the method is absent, the value is incomplete for a rigorous comparison.

Identify the pomace fraction behind the numbers

Tomato pomace is a processing co-product that can include varying proportions of tomato skins, seeds and pulp. Offers may refer to whole pomace or to a separated fraction. Those materials are not automatically nutritionally equivalent: separating components changes what is present in the material being analyzed, and can therefore change measured protein, fat, fiber and ash.

Clarify whether the analysis represents whole pomace or a named fraction, and whether processing has removed or concentrated particular components. A report labeled only “tomato pomace” may not resolve that distinction. Match the sample identity to the product description before using its analysis to set a formulation value or compare suppliers.

This identity question is especially important when one quote describes a fraction and another describes an unsorted or whole material. A difference in reported composition may reflect the material’s composition, its moisture basis, the analytical method—or more than one of these factors.

Read the main analysis fields together

Moisture establishes how much water is present and supports conversion between as-fed and dry-matter values. Protein and fat are useful comparison fields, but they need the same basis and a clearly identified product fraction. Fiber needs both a stated basis and named method. Ash reports the inorganic residue remaining after the sample is burned; it is another point of comparison, not a substitute for identifying the material or interpreting its other results.

Build a side-by-side table with one row for each lot and columns for sample identity, moisture, protein, fat, fiber value, fiber method, ash, and the reporting basis for each result. Note units and whether values are supplied as-fed or dry matter. Avoid combining results from different reports as though they described one sample.

There is no universal target value that determines whether tomato pomace is right for every use. The meaningful comparison depends on the formulation, the product form and the specification your operation needs. Analyze the offered lot and its method details before making claims about its composition.

Make a like-for-like comparison before sourcing

Before choosing between offers, check that the product fraction matches, the moisture result is available, nutrient values use a stated basis, and the fiber method is named. Ask for the lot’s analysis and the method information behind it; a label or a single fiber number cannot answer all of these questions. If a report provides values on different bases, convert them consistently and retain the original figures.

For a bulk purchase, also make sure the described product is the form your facility expects to receive and handle. Analysis helps compare composition; it does not by itself establish packaging, shipment terms or a lot’s suitability for a particular formulation. Those details belong in the purchase discussion alongside the quality requirements.

When you are ready to source tomato pomace, use the [Tomato Pomace page](/ingredients/tomato-pomace) to connect the product you need with your analysis and quality criteria.

Common questions.