When considering OEM contract manufacturing or sourcing of NMN supplements, it is essential to have criteria for appropriately evaluating "quality." Even if a product label states "Contains high-purity NMN," the methods used to measure and guarantee that purity can vary significantly from product to product. This article will clarify the three core elements that determine NMN product quality and explain the specific points to check when placing OEM orders or sourcing.
Element 1: Raw Material Purity — Meaning and Actual Measurement Methods of "99%"
NMNサプリメントの製品仕様書や原料規格書には「純度99%以上」「純度99.9%」などの記載が一般的に見られます。しかし、この数値が何を意味し、どのように測定されているかを理解しなければ、適切な比較評価はできない。
For NMN raw powder purity measurement, mainlyHigh-Performance Liquid Chromatography (HPLC)It is used. HPLC is a precise analytical method that physically and chemically separates and quantifies each component in a solution, allowing detection of not only the main component content of NMN but also the presence and amount of impurities. "HPLC purity 99%" means that the peak area ratio of the main component (NMN) in the HPLC analysis is 99%, and the remaining 1%may include by-products, degradation products, residual solvents, etc.
What's important is not just the purity value, but "What impurities are contained and to what extent?is whether the details can be confirmed. Reputable manufacturers can issue and present a Certificate of Analysis (CoA), including HPLC chromatograms, for each lot to customers.
In addition, at our company, Zarz, all purity analysis test results conducted to date100% Purity%achieved. Furthermore, we used the NMN with this purity of 100%as a sample and conducted a water solubility degradation test (purity test performed over time after dissolving NMN in water). As a result of purity analysis conducted again after 30 minutes and 3 hours, at both time points100% purity%retainedIt was confirmed that it is stable. This data demonstrates the high stability of the raw material, and serves as a basis for consumption by opening capsules and mixing them into beverages, as well as for considering applications in drinkable formulations.
Element 2: Manufacturing Methods - Differences between Yeast Fermentation, Chemical Synthesis, and Enzymatic Synthesis
There are mainly three types of NMN raw material manufacturing methods. Understanding the characteristics of each is important for raw material selection.
Chemical Synthesis
Methods for synthesizing NMN through multi-step reactions using chemical raw materials. This method is historically the most widespread and relatively easy to reduce production costs. On the other hand, there is a risk of by-product contamination associated with multiple synthesis steps, and thorough purification processes are directly linked to stable quality.
Yeast fermentation method / Biosynthesis
Method for biosynthesizing NMN using the metabolic pathways of microorganisms (such as yeast). This method is often promoted as a "more natural process" compared to chemical synthesis. However, controlling production efficiency and yield is difficult, and quality control in the purification process is also important.
Enzymatic Synthesis
Methods for synthesizing NMN using specific enzymatic reactions. While this method is said to yield high-purity products with fewer side reactions, there can be challenges with equipment costs and manufacturing scale.
No manufacturing method can be said to be "absolutely superior," and it ultimately depends on what is shown in the product CoA.Judging quality by purity and impurity profilesis important.
Element 3: Third-Party Certification — Why In-House Testing Alone Is Not Enough
Not only quality inspections carried out by manufacturers themselves (in-house testing), but also obtaining testing and certification from independent third-party organizations, hold significant meaning as proof of reliability.
GMP Certification (Good Manufacturing Practice)
Refers to the quality control standards for the entire manufacturing process. In Japan, "Health Foods GMP" (certification by third-party inspection) is widely adopted, and manufacturing in factories with GMP line certification serves as a reassurance for buyers.
Third-party analytical testing of ingredients
In Japan, ingredient analysis tests can be conducted by inspection bodies registered with the Ministry of Health, Labour and Welfare (e.g., the Japan Food Research Laboratories). A Certificate of Analysis, which verifies the ingredient content and purity for each lot from a third-party perspective, serves as the most powerful evidence for building trust with domestic and international buyers.
International certifications such as NSF and Informed Sport
For the U.S. market, products that have obtained certifications such as NSF International certification and Informed Sport certification have high reliability. These internationally certify that there are no prohibited substances and that the ingredient content is accurate.
Quality Confirmation Form for OEM Orders and Procurement (Checklist Example)
Examples of quality-related items to confirm when inquiring with contract manufacturers and raw material suppliers:
- NMN raw powder purity (%) and measurement method (HPLC, etc.)
- Availability of Certificate of Analysis (CoA) per batch
- Disclosure of impurity profile
- Confirmation of manufacturing method (chemical synthesis, fermentation, enzyme)
- Types of GMP Certification, Certifying Bodies, and Expiration Dates
- Third-party organization examination status and examination institution names
▶ 当社のβ-NMNは第三者機関による純度分析で純度100%を確認しています。詳細はNotification of 100%%Purity ConfirmationPlease look.
▶ For details on quality design (lot variation, stability, test design), please also refer to "How to Ensure the Quality of NMN Supplements."
Summary
The quality of NMN supplements can be evaluated on three criteria: "purity level, manufacturing method, and third-party certification." Specifically, purity verification by HPLC and independent testing by a third-party organization are minimum requirements for quality assurance in OEM products. When comparing costs, a comprehensive judgment that includes these quality assurance costs will lead to the protection of long-term brand trust and profitability.
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