DAO Enzyme Supplier for Supplement Brands and Contract Manufacturers
Diamine oxidase (DAO) ingredient supply for supplement brands, contract manufacturers and distributors: what to specify, how activity is stated and what to send for a quote.
Brands and contract manufacturers that put diamine oxidase (DAO) into capsules or tablets share one buying problem: two DAO powders with similar labels can carry very different activity, so the price per kilogram says little until activity, source and format are pinned down. This page sets out what to specify when you source DAO as an ingredient and what to send for a quote. Send the product, quantity and destination through the quote form on our home page or by email to hello@mail.enzymeb2b.com.
Who buys DAO as an ingredient
Supplement brands that sell a finished DAO product; contract manufacturers that fill capsules or press tablets for those brands; distributors and resellers that supply regional brands; and food and ingredient developers working on new formats. Each of them buys by activity, not by weight, and each needs the same three answers before a quote means anything: where the enzyme comes from, how its activity is measured and what else is in the powder.
What to specify: source, activity and format
Source: ask each supplier to state the source of the enzyme in writing, because it decides your label wording, and put your own requirement in the request.
Activity: DAO activity is declared in units defined by the supplier's own assay. Ask for the unit definition and the assay method, and compare offers only on the same unit.
Format: a powder for blending, or a standardised ingredient on a carrier. Ask what the carrier is and how much of it the powder contains.
Stability and storage: ask what activity the ingredient keeps through your encapsulation or tableting steps and over its shelf life, and which storage conditions the supplier's specification requires; enzyme powders are normally kept cool, dry and protected from light.
Documentation Buyers Should Require
A reliable enzyme supplier quote request should ask for the same technical package across all candidate vendors. At minimum, request a recent certificate of analysis, technical data sheet, safety data sheet, storage instructions, shelf-life basis, activity assay description, carrier or excipient declaration, and country of origin. If the enzyme may enter food or beverage supply chains, ask for food-grade suitability statements, allergen information, microbial limits, heavy metal specifications, and available kosher or halal documentation without assuming those statuses exist. A kosher halal enzyme supplier should provide current documents from recognized third parties only when applicable. For regulated industrial workflows, also request change-control practices, lot numbering, traceability, and sample retention policies. Do not rely on marketing claims alone. The best enzyme b2b sourcing process compares documentation quality, responsiveness, and technical support alongside unit cost and lead time.
Require COA, TDS, and SDS before approval. • Verify any kosher, halal, or food-grade statement. • Ask how activity is measured and released.
How to compare DAO quotes
Normalise each offer to delivered activity: price divided by the activity you actually receive, on the same unit definition. Then compare carrier content, shelf life at the stated storage conditions, packaging, lead time and the completeness of the documents. Ask whether the offer comes from the manufacturer or a distributor, because that affects technical answers and change notification. A lower price per kilogram can be the more expensive offer if the powder carries less usable activity or more carrier.
Compare on delivered activity, same unit. • Ask for the carrier and its share. • Check shelf life at your storage conditions. • Put documentation needs in the written request.
Product claims stay with the brand
DAO is sold into a regulated product category. What a finished product may say on its label depends on the market it is sold in, so claim wording belongs to the brand and its regulatory adviser. As an ingredient supplier we quote on activity, source, format, packaging and documents, not on end-use claims.
Next step: request a DAO quote
Send your source requirement, the activity you need per gram and the unit it is measured in, the quantity for the first order and per year, the format and any carrier limits, the documents you need and the destination country through the quote form on our home page or by email to hello@mail.enzymeb2b.com.
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Frequently Asked Questions
What information should I send in a DAO enzyme supplier quote request?
Source requirement, target activity and its unit, quantity per order and per year, format and carrier limits, the finished product it goes into (capsule, tablet or powder blend), the documents you need and the destination country.
How is DAO activity compared between suppliers?
Only on the same unit definition. DAO activity is declared by each supplier's own assay, so ask for the method and the unit definition with every offer, and convert each price to cost per unit of activity delivered before comparing.
Can I use the lowest-cost enzyme supplier if the activity looks similar?
Not without normalizing the offer. Compare delivered activity, unit definition, stability, carrier content, dosage required, shipping conditions, documentation quality, and supplier support. A lower price per kilogram may be more expensive if the preparation has lower usable activity or creates QA burden. Calculate cost per treated unit and include trial performance, waste, rework, and storage losses.
Do DAO enzyme suppliers provide kosher, halal, or food-grade documentation?
Some suppliers may provide food-grade handling statements or kosher and halal documents, but these should never be assumed. Ask for current documentation tied to the specific product, manufacturing site, and lot where applicable. If the project requires a kosher halal enzyme supplier, include that requirement in the RFQ and verify documents through your internal quality approval process.
How do distributors and resellers request a DAO quote?
Send the product, quantity and destination, plus the markets you sell into, and we quote per order.
Request a DAO quote
Turn This Guide Into a Supplier Brief Request DAO enzyme supplier quotes with COA, TDS, SDS, samples, and pilot-scale technical support.
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