Start with the basis: as-fed or dry matter
A nutrient result is only comparable when you know what it is measured against. An as-fed value describes the product in the condition received, including its moisture. A dry-matter value removes the water mathematically, making it easier to compare the nutrient content of materials with different moisture levels.
For a fair comparison, put results on the same basis before judging one tomato pomace offer against another. To convert an as-fed nutrient result to a dry-matter basis, divide it by the dry-matter fraction. To convert a dry-matter result to an as-fed basis, multiply it by that fraction. The report’s moisture or dry-matter result supplies the fraction used in the calculation.
This distinction affects every nutrient reported as a percentage, not just protein. A lot with more moisture can show lower as-fed nutrient percentages even when its dry portion has a similar composition. Comparing mismatched bases can therefore make two offers look more different—or more alike—than they are.
Read moisture alongside dry matter
Moisture describes the water present in the sample; dry matter is the portion left after water is excluded. The two measures are complementary, so verify which one appears on the specification and whether the values use the same reporting basis as the nutrients.
For bulk buyers, moisture is also a practical receiving and handling consideration. It affects the amount of dry material represented by a delivered weight and informs how the product should be managed after receipt. The analysis helps with comparison, but it does not replace a storage plan suited to the product’s actual condition and the receiving facility.
Compare protein, fat and ash on matching terms
Protein and fat results help buyers and formulators characterize a tomato pomace lot for its intended use. Ash represents the sample’s inorganic residue after analysis and contributes another point of comparison. None should be treated as a guaranteed value for all tomato pomace: composition can differ with the material entering the pomace and how it is processed.
Check whether each result is stated as-fed or on a dry-matter basis, and look for the analytical method if it is provided. A specification and a lot report are most useful when they identify the product, state the basis clearly and present results that can be interpreted on the same terms. If one offer gives as-fed figures and another gives dry-matter figures, convert before comparing.
Fiber results depend on the method
“Fiber” is not always a single interchangeable measure. Crude fiber and detergent-fiber measures such as neutral detergent fiber (NDF) or acid detergent fiber (ADF) use different analytical approaches and describe different fractions. A result from one method should not be compared directly with a result from another as though they measured the same thing.
When fiber matters to a formulation, identify the exact measure and method used, then compare like with like. Ask for clarification if a report says only “fiber” without naming the test. That detail is especially important when a buyer’s target or formulation software is built around a particular fiber measure.
Why tomato pomace composition varies
Tomato pomace is a processing by-product that can contain varying proportions of skins, seeds and pulp. Those components do not have identical composition, so changes in their relative amounts can influence the analysis. Processing and the condition of the material can also affect what the reported moisture and nutrient values represent.
That variation is why a generic reference value cannot substitute for the actual specification and lot report. For a sourcing request, name the measures that matter, specify the required reporting basis and state which fiber method is relevant. Buyers evaluating tomato pomace can use the [Tomato page](/ingredients/tomato) to start a sourcing request built around those comparison points.
Common questions.
Why can tomato pomace protein look different between two reports?+
First check whether both results use the same basis. An as-fed percentage includes the effect of moisture, while a dry-matter percentage excludes it. Composition can also vary with the proportions of skins, seeds and pulp. Compare results only after confirming the reporting basis and product information.
Can I compare crude fiber in one tomato pomace report with NDF in another?+
Not as equivalent measurements. Crude fiber and NDF use different analytical methods and describe different fractions. Compare the same named measure and method, or clarify which result your formulation requires.
What should a tomato pomace lot report show?+
For useful comparison, look for product identification, moisture or dry matter, protein, fat, ash and the specific fiber measure and method. Check whether nutrient results are reported as-fed or on a dry-matter basis, and use the lot report for the material being evaluated.