Before a U.S. buyer places a bulk order for an imported ingredient, one practical question comes up: can this shipment be stopped at the border, and what would we do if it is? For phosphatidylserine (PS) sourced from China, the answer starts with FDA import alerts and a process called detention without physical examination, or DWPE.

The direct answer for most buyers is this: FDA import alerts are product-, firm-, and country-specific, so an alert affecting one supplier's shipment does not automatically affect another's. A U.S. importer should search the FDA import-alert database before committing to an order, verify that the manufacturing facility is registered, and prepare an entry file that can respond quickly if FDA issues a Notice of FDA Action. As of this article's publication date, a live search of the FDA import-alert database returned no alert naming phosphatidylserine. Because alerts are updated in real time, that check must be repeated for every supplier, product, and country combination before every order.

This guide is written for U.S. importers, distributors, supplement manufacturers, functional food brands, and their procurement, quality, and regulatory teams. It focuses on the buyer's side of import-alert risk: what DWPE is, which alerts can affect supplement ingredients, how to screen before purchase, and what to do if a shipment is detained.

Where Nutranexa is mentioned, only verified public facts are used. Nutranexa identifies itself as Shandong Baianrui Biopharmaceutical Co., Ltd., founded in 2013, operating a 110,000+ m2 campus, and primarily serving export markets in Europe and North America. Its public pages reference R&D cooperation with East China University of Science and Technology, PS COA and specification evidence, and a 25 kg minimum order with 25 kg net per drum. Nothing here replaces the current specification, batch COA, facility-registration details, or entry documents a buyer must confirm with the supplier and broker.

The Short Answer Buyers Need First

Run this four-point screen before you commit to a PS supplier or release a shipment:

VerifiqueWhat it answersWhere it fits
Search FDA import alerts by product, manufacturer, shipper, and countryWhether the product, firm, or country appears on a red list subject to DWPEBefore RFQ, before PO, and again before shipment
Confirm the manufacturing facility has a valid FDA food-facility registrationWhether the food can be held under the unregistered-facility rule at the portSupplier qualification and entry preparation
Build the entry document file before the vessel sailsWhether you can respond to a detention with evidence inside the response windowPre-shipment document collection
Know who files the entry and who holds the FDA and CBP recordsWhether the importer of record, broker, and supplier roles are clearOrder confirmation and shipment handoff

If any check is unanswered, resolve the gap in writing before money moves. An import alert does not make a product illegal to buy, but a product subject to DWPE can be detained and refused unless the importer overcomes the appearance of a violation.

What an FDA Import Alert Is and What DWPE Means

FDA describes import alerts as a tool used to protect consumers against products with a history of known violations. When FDA discovers a violation, it can place a product on an import alert and then detain future shipments of that product without testing or physically examining each entry, a practice called "detention without physical examination," or DWPE. The authority to refuse products that appear to be in violation comes from section 801 of the Federal Food, Drug, and Cosmetic Act, codified at 21 U.S.C. 381.

Two words matter to buyers. "Appear": FDA can act when a product appears to be in violation, without proving it on the specific shipment. "Without physical examination": under an active alert, the shipment can be stopped without sampling or testing, which is why document preparation matters more than testing alone.

An import alert can be based on the product, the manufacturer, the shipper, the importer, the country of origin, or other information. Each alert states the reason, the products and firms affected, the laws that appear to have been violated, and a guidance section explaining how DWPE is applied, how to secure release, and how to be removed. FDA publishes alerts in a searchable database and advises importers to check whether their products are subject to DWPE before importing.

How Import Alerts Work: Red, Yellow, and Green Lists

Most import alerts carry lists that define exactly who is affected:

ListMeaningPractical effect for a PS buyer
Red listFirms, products, or countries that meet the criteria for DWPEEntries are subject to detention without physical examination unless evidence overcomes the appearance of violation
Yellow listFirms, products, or countries subject to intensified surveillanceExpect more frequent examination or analysis, not automatic refusal
Green listFirms, products, or countries exempt from DWPE under that alertListed combinations are not subject to DWPE under that alert; unlisted combinations may still be

The FDA import-alert database is updated in real time, and FDA's search tool recommends searching before importing with multiple criteria: manufacturer name, product name, and country of origin. The guidance section of each alert tells you what evidence could secure release and whether the listed violation precludes release altogether.

Which Alerts Can Affect Supplement Ingredients

No alert names phosphatidylserine as of the publication date, but several active DWPE alerts cover dietary supplements and bulk dietary ingredients:

AlertScopeWhy a PS buyer should know it
Import Alert 54-14DWPE of dietary supplement products from firms that have not met dietary supplement GMP (21 CFR Part 111)A supplement maker's GMP failure can put its products on DWPE; ingredient buyers downstream inherit the risk
Import Alert 99-45DWPE of food products, including dietary supplements, that contain an unsafe food additive under FD&C Act sections 402(a)(2)(C)(i) and 409Release evidence can include analytical results showing the shipment does not contain the identified additive
Import Alert 99-32DWPE of human and animal food products from foreign establishments refusing FDA inspectionA supplier that refuses inspection can put its products on DWPE even when the ingredient itself is routine

These examples show why the search must combine product, firm, and country criteria: a routine PS powder can still be detained because of GMP status, an additive issue in a downstream formula, or an inspection refusal. The dated check here is a starting point only — re-run the search with your supplier's exact legal names and country of origin, and ask the supplier to confirm in writing whether they are listed on any active alert.

FDA DWPE vs. Other Import Controls at the U.S. Border

Import-alert screening sits next to several other U.S. import controls, and buyers often confuse them. The distinctions that matter:

ControlAgency and triggerRelationship to DWPE
Importer Security Filing (ISF)CBP, cargo-security data before ladingA separate advance-filing requirement; see our ISF 10+2 checklist
FDA prior noticeFDA, advance notice of food importationA separate prerequisite for admissibility; see the prior notice checklist
FSVPFDA, importer verification of foreign suppliersA separate importer duty; see the FSVP checklist
Facility registration holdFDA under section 801(l) and 21 CFR 1.285Food from an unregistered foreign facility is held at the port; registration and the number must be resolved before release
UFLPA detentionCBP, forced-labor presumption for covered supply chainsA different legal basis from FDA DWPE, covered in the UFLPA compliance review

The facility-registration point deserves emphasis because it is not an import alert. Under 21 CFR 1.285, food from a foreign facility not registered under section 415 of the FD&C Act is subject to hold under section 801(l). The facility must register and the buyer must submit the registration number to FDA within 30 calendar days, or the food may only be sold for export or destroyed. Our FDA food-facility registration review covers how to verify that file.

Pre-Order Import-Alert Screening Checklist

Use this checklist during supplier qualification and again before each shipment release:

  1. Search the FDA import-alert database for the exact product name, manufacturer legal names, shipper, and country of origin.
  2. Review the red, yellow, and green lists on any matching alert, not just the title.
  3. Read the guidance section to see whether release evidence is possible and what it needs to include.
  4. Confirm the foreign manufacturing facility has a valid FDA food-facility registration number.
  5. Ask the supplier in writing whether they are listed on any FDA import alert, warning letter, or import refusal.
  6. Check whether the product or its source material appears in FDA import-refusal reports, which are separate from alerts but still signal risk.
  7. Record the search date, terms, and result in the supplier qualification file so the review is repeatable at the annual supplier review.

The last step is the one most teams skip: a screen is only meaningful when it is dated, documented, and repeatable.

The Entry Document File That Supports Release

If FDA detains a PS shipment, the importer typically has about 10 business days, reflected as up to 20 calendar days on the notice, to submit evidence. That window is too short to start collecting documents, so assemble the file before the shipment sails:

  • Commercial invoice, packing list, and bill of lading or airway bill
  • Prior notice confirmation and the facility registration number for the foreign manufacturer
  • Product specification and batch certificate of analysis (COA) tied to the shipped lot
  • Lot traceability records from raw material through finished powder and dispatch
  • Country-of-origin marking and labeling information
  • FSVP records showing the importer's verification of the foreign supplier
  • Independent lab test reports if the buyer has already commissioned them
  • Broker contact and entry numbers so the response can be filed through the same channel

For COA review, see our PS COA and specification review and the third-party testing guide on independent lab evidence that can support a release request.

When FDA Detains a Shipment: The Response Process

FDA's detention and hearing page describes the practical process. When a product appears to violate FDA law, FDA may detain it and issue a Notice of FDA Action marked "Detained." That notice, the Notice of Detention and Hearing, lists the charges and a "respond by" date.

The importer, owner, or consignee responds by submitting testimony, any information intended to overcome the appearance of the violation. The preferred channel is FDA's Import Trade Auxiliary Communication System (ITACS), usable by the importer, customs broker, or another responsible party. Private laboratory reports can be evidence for DWPE shipments, and extension requests may be granted if made within the timeframe with a reasonable basis.

If the importer cannot overcome the appearance of the violation, the product is refused admission and can be destroyed or exported within 90 days, working with CBP and FDA. Reconditioning, such as relabeling, is an option in limited cases. The window is short and evidence-based, which is why the entry file and the named importer of record must be agreed before shipment.

Questions to Ask a PS Supplier Before You Commit

Add these questions to the RFQ and supplier-qualification file:

  1. What is the exact legal name of the manufacturing facility and its FDA food-facility registration number?
  2. Is the manufacturer, shipper, or product listed on any active FDA import alert?
  3. Can you provide a current specification and a batch COA tied to the lot we will receive?
  4. Can you provide lot traceability from raw material through production and dispatch?
  5. Are country-of-origin markings, labels, and export packaging confirmed for the U.S. destination?
  6. Can your team support evidence requests if FDA examines the entry?

Nutranexa's public PS product page and its soy e sunflower PS paths support the first rounds of this review, including specification and COA requests, source selection, and manufacturing e quality evidence. Current registration details, batch COAs, and entry-specific files must still be confirmed with the sales team and broker before each order.

What Verified Nutranexa Facts Mean for This Review

Nutranexa's verified public facts are relevant to the pre-order screen, not to border outcomes. The company was founded in 2013, operates a 110,000+ m2 campus, primarily serves Europe and North America, and references R&D cooperation with East China University of Science and Technology. For PS, the public position is a 25 kg minimum order with 25 kg net per drum, plus COA and specification evidence and factory, packaging, and dispatch imagery.

None of these facts substitute for a dated import-alert search, a current facility registration, or batch documents for the exact lot. Use them to shortlist, then run the compliance checks with your supplier and broker.

Need current PS specifications and COA evidence for your entry file? Request the document set with your application, source preference, target market, and annual quantity.

Conclusion

FDA import alerts and DWPE are screening tools, not vague risks. They attach to specific products, firms, and countries, and operate on an appearance standard that favors prepared importers. A U.S. buyer of bulk PS reduces border risk by searching the FDA database with the exact supplier names, confirming facility registration, building the entry document file before shipment, and agreeing in advance who responds to a Notice of FDA Action.

For most commercial PS purchases from China, the workload is small: one dated database check, one registration confirmation, one batch-matched document set, and one clear broker handoff. That file is the same one your quality team needs for incoming inspection, so it earns its place in supplier qualification.

Perguntas frequentes

Is phosphatidylserine on an FDA import alert?

As of August 5, 2026, a live search of the FDA import-alert database returned no alert naming phosphatidylserine. Alerts are updated in real time and are product-, firm-, and country-specific, so re-run the search with your supplier's exact legal name and country of origin before every order.

What does DWPE mean for my PS shipment?

Detention without physical examination means FDA can stop future shipments from a listed product, firm, or country without sampling or testing. The importer can still present evidence to overcome the appearance of a violation, and the guidance section of the alert explains what evidence may be appropriate.

How do I check FDA import alerts before ordering?

Use the FDA import-alert search tool and search multiple criteria: product name, manufacturer name, shipper, and country of origin. Review the lists and guidance section of any matching alert, and record the date and results in the supplier qualification file.

What happens if my PS shipment is detained by FDA?

FDA issues a Notice of FDA Action marked "Detained," listing the charges and a respond-by date, generally 10 business days reflected as up to 20 calendar days. The importer, owner, or consignee submits evidence through ITACS or the local import office; if the appearance of violation is not overcome, the product is refused and may be exported or destroyed within 90 days.

Is an FDA import alert the same as a CBP detention?

No. FDA import alerts and DWPE operate under the Federal Food, Drug, and Cosmetic Act for products that appear to violate FDA law. CBP detentions, such as UFLPA reviews, operate under customs and forced-labor authorities. A shipment can face either or both, so each agency's requirements are checked separately.

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