What to Do If You Bought a Problem Supplement: A 2026 Guide to Complaints and Keeping Evidence
JHFC consumer verification guide Published: November 6, 2026
If you bought a supplement that may be counterfeit, expired, different from what was described, or that made you feel unwell, do not panic. This guide covers two things: how to keep evidence, and how to find the right place to complain. JHFC does not handle individual cases or recommend brands. It only explains ways to check products and protect your rights.
Stop taking it first; see a doctor if you feel unwell
When you notice the product is suspect, or you feel unwell after taking it, the first step is to stop taking it. Continuing may increase the risk and make it harder to tell whether the problem came from the product itself or from how it was taken.
If you already have clear symptoms such as a rash, nausea, diarrhea, or heart palpitations, see a doctor first. Keep the consultation record, medical record, test orders, and payment receipts. These are important evidence for any later complaint.
People who are taking medicine, have a chronic condition, or are pregnant or breastfeeding should have consulted a doctor or pharmacist before buying. If they have already bought the product and are about to take it, they should ask first before deciding.
Keeping evidence: do not throw anything away
A complaint needs evidence. Collect as many of the following materials as you can. Do not throw away the original packaging yet; before opening it, take photos or video if possible, to avoid later disputes about what it looked like.
- Order information: time of order, product name, specification, quantity, amount.
- Payment records: payment voucher, transaction ID, invoice.
- Product page screenshots: the promotional wording on the detail page, product parameters, place of origin, and description of import method. The page may be changed later; a screenshot is the evidence from that time.
- Physical packaging: outer box, bottle, inner packaging. Focus on photographing the batch number, production date or expiry date, and manufacturer or distributor information.
- Chat records: conversations with customer service or the seller, especially the other party's replies and promises about the product problem.
- Test reports: if you sent the product for testing yourself, keep the full report. If the seller provided a report, keep the original file and note the batch number.
- Medical records: if you had symptoms, keep the medical record, prescription, test orders, and payment receipts.
When you make a complaint, evidence that can be linked to the specific product and the specific problem will make your case easier to explain.
Check the product: first be clear about what is wrong
Before complaining, it is best to list what you suspect. Use the verification checklist below item by item, focusing on whether the batch number, label, claims, and test report support each other.
| Item to check | Where to look | What adequate information looks like | Warning signs |
|---|---|---|---|
| mainland China health food approval number | the special food information database of China's State Administration for Market Regulation (SAMR) | The registration or filing number can be found, and the health function matches the packaging | No record found; number does not match; no "blue hat" health food logo but health functions are claimed |
| Expiry date | Product packaging | Production date and expiry date are clear and match the page claims | Already expired; date altered or unclear; page says "effective indefinitely" |
| Batch number matches the test report | Test report provided by the seller | Report states the sample batch number, test method, testing institution, and the batch number matches the actual product | Batch number does not match; report lacks a batch number; only a "certificate of conformity" with no test items |
| Chinese label | Back of product or affixed label | Product name, ingredients, manufacturer or importer information are clear and match the page | No Chinese label but sold as "general trade imports"; label differs from foreign-language information |
| Cross-border e-commerce risk notice | Order page or product detail page | At purchase, the platform gave a risk notice explaining that the item is supervised as a personal-use item and may have no Chinese label | No notice on the page; directly claims full consistency with domestic standards |
| Seller identity | Business license or other information shown on store homepage | Entity name matches the license; invoice can be issued; after-sales contact is available | Entity cannot be found; license image is unclear; after-sales keeps stalling |
| Product claims | Detail page, packaging, chat records | Claims mention ingredients and amounts only, not treatment effects; supporting evidence is available | Claims the product can cure disease; exaggerated effects; different pages contradict each other |
When asking the seller for a test report (certificate of analysis), focus on whether the report clearly says whether the sample is a raw material or finished product, the batch number, the test method, and the test result. JHFC lists these requirements in the Certificate of Analysis Content and Disclosure Standard and the Document and Version Control Standard for Health Foods. If the report the seller gives you lacks a batch number, or the seller keeps failing to provide materials that match the batch number on the actual product, be careful.
Complaint channels: follow the place of purchase
For products bought in mainland China, you can first use the e-commerce platform's after-sales or complaint channel and ask the platform to step in. At the same time or afterwards, you can file a complaint or report through China's national 12315 consumer complaint platform. The 12315 platform has a website, a mobile app, and a hotline. After it accepts a case, it will investigate according to its procedures, but that does not mean there will necessarily be compensation.
For products bought in Japan, you can call Japan's consumer hotline 188. This number connects to the local consumer affairs center, for consultation and referral.
For disputes involving cross-border transactions, you can consult the Cross-border Consumer Center Japan (CCJ) of the National Consumer Affairs Center of Japan. This is a consultation window for cross-border consumer disputes. It can explain possible ways to handle the matter and what materials to prepare, but it does not guarantee a resolution.
If you are in mainland China and the product was shipped directly from Japan, rules from both places may apply. It is best to organize your evidence first, and then decide whether to contact the platform or call the hotline first.
Common misconceptions
- Misconception: No Chinese label means the product is fake. Explanation: Cross-border e-commerce retail imports are supervised as personal-use items and may have no Chinese label. But if the page says "general trade imports", the product should have a Chinese label.
- Misconception: Having a test report means the product is fine. Explanation: You need to check whether the batch number matches, whether the sample is a raw material or finished product, and whether the test items cover the relevant point. Do not rely only on the phrase "there is a report."
- Misconception: Filing a complaint guarantees a refund or compensation. Explanation: Filing a complaint starts an investigation and a handling procedure. The result depends on the evidence and the specific facts. JHFC does not promise any result.
- Misconception: Every Japanese product is approved one by one by the government. Explanation: In Japan, only Foods for Specified Health Uses require individual permission from the Consumer Affairs Agency (CAA). Foods with Function Claims are filed as notifications, not approved one by one.
Related JHFC standards
- JHFC-A-003 Certificate of Analysis Content and Disclosure Standard: Use this when checking a test report provided by a seller. It requires the sample, batch number, test method, and result to be stated.
- JHFC-A-010 Document and Version Control Standard for Health Foods: Use this when checking whether the seller's documents have version control, to prevent old materials from being matched to a new batch number.
- JHFC-A-009 Information Disclosure Standard for Imported Health Foods: Use this for information about the source and import method of imported products, to check where the product came from.
Scope of this guide
This guide only explains how to check information and how to complain. It does not evaluate the efficacy of any ingredient, and it does not recommend or certify any specific product. JHFC does not handle individual complaints and does not promise any complaint result. People who are taking medicine, have a chronic condition, or are pregnant or breastfeeding should consult a doctor or pharmacist before buying.
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