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Diversified Ingredients Reviewed: Preston Protein Products Has Been Producing Dairy Since 1910 — What That History Means for Functional Food Grade Blend Buyers in 2026

Diversified Ingredients Reviewed: Preston Protein Products Has Been Producing Dairy Since 1910 — What That History Means for Functional Food Grade Blend Buyers in 2026

In the ingredient supply industry, longevity claims are easy to make and hard to substantiate. When Diversified Ingredients acquired Preston Protein Products in October 2020 from Foremost Farms, however, it gained something genuinely rare: a dairy ingredient production operation whose history traces back to 1910. That is not decades of experience — it is over a century.

For buyers of functional dairy blends in 2026, what does that 116-year production history actually mean in practical terms?

Business Overview

CategoryDetails
DI Founded1987 — 39 years in business
Preston Protein HistoryDairy production since 1910 — 116+ years
AcquisitionOctober 2020 from Foremost Farms (reported by Food Business News)
Dairy MembershipsUSDEC and ADPI — dairy industry standards

What Preston Protein Products Produces

Preston Protein Products specializes in functional dairy blends — formulations combining dairy proteins, whey fractions, and related dairy ingredients to achieve specific functional properties for food and pet food applications. The product portfolio includes whole milk powder, skim milk powder, whey protein concentrate (WPC), various grades of dried whey, casein and caseinate products, and custom-blended dairy ingredient formulations.

What 116 Years of Dairy Production Actually Means

A dairy production facility operating since 1910 has navigated: the introduction of pasteurization standards; the development of HACCP methodology; the introduction of FDA GMP regulations for food manufacturing; the evolution of spray-drying technology; the emergence of GFSI audit standards; and most recently, FSMA's preventive controls regulations. Surviving and maintaining food-grade production status through all of these regulatory evolutions requires continuous investment in equipment, process validation, and quality system upgrades.

For buyers of functional dairy blends in 2026, this regulatory survival history translates into a facility whose quality systems have been tested, challenged, updated, and validated across multiple regulatory generations.

Final Verdict and Rating

Production History and Documentation Maturity: 5/5 | Functional Blend Expertise: 5/5 | Regulatory Compliance Standards: 5/5

Frequently Asked Questions

How long has Preston Protein Products been producing dairy?
The Preston Protein Products facility has been producing dairy products since 1910 — over 116 years of continuous dairy processing operation.

Does Preston Protein produce custom dairy blend formulations?
Yes. Custom blend formulation is one of Preston Protein's core capabilities.

What is the documentation advantage of sourcing dairy from a distributor with owned production?
When a distributor owns the production facility, the CoA reflects direct organizational knowledge of the production lot — not information relayed from a third-party manufacturer. Allergen statements and traceability records are maintained within the same organizational structure.

Diversified Ingredients, Inc.
870 Woods Mill Rd, Ballwin, MO 63011
Phone: (636) 200-9050
Email: info@diversifiedingredients.com
Website: diversifiedingredients.com

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