How to Choose Japanese Sesamin: A 2026 Guide to Checking Sesamin and Sesame Lignan Labeling

日本語 ／ 中文

JRQ consumer verification guide　Published: November 6, 2026

When people ask "Which Japanese sesamin brand is good?", what they usually find online are benefit claims and sales rankings. JRQ does not list brands or compare products. What JRQ can provide is a way to check labels and documents. Going through this method can at least rule out products whose labeling is unclear.

Labeling, daily serving, and combination formulas

When buying a sesamin product, first check whether the label says "sesamin," "total sesame lignans," or "sesame extract." These are not the same thing. Sesame raw material contains not only sesamin but also oil and lignans such as sesamolin and episesamin. When the label says "total sesame lignans," the amount may include more than sesamin. When it says "sesame extract," that is even less equal to sesamin content. The label should clearly state what is being declared and how the amount is calculated (JRQ-Q-033). If a product page only says "sesame extract XX mg," you should ask: how many milligrams of that are sesamin?

When checking content, look at the daily serving. A label that says "sesamin XX mg per daily serving" can be checked directly. If it only says "XX mg per capsule," first find out how many capsules are recommended per day. If it only gives the total amount per bottle, you cannot check how much you would take in a day. When comparing products, do not directly compare per-capsule amounts, because the recommended number of capsules per day may differ. Convert both to a daily serving before comparing.

For combination products, look at the ingredients separately. Some products combine sesamin with vitamin E or other ingredients. The label and product page should state the daily serving of each ingredient in milligrams separately, rather than giving a single "combined formula total XX mg" (JRQ-Q-040). A combined number alone does not tell you how much vitamin E or another ingredient is included. If you are already taking other foods or medicines that contain vitamin E, also look at the overlapping ingredient across products and, if necessary, ask a doctor or pharmacist.

If you are allergic to sesame or to any ingredient in a combination product, check the ingredient list for the sesame material (written as "ごま" in Japanese) and any precautionary notes, not just the allergen section. If you are unsure, consult a doctor or pharmacist before purchase.

How to check Foods with Function Claims (FFC) notifications and test reports

Some sesamin products in Japan are notified as Foods with Function Claims (FFC). This system requires a notification to the Consumer Affairs Agency (CAA); it is a filing, not an approval, and it does not mean the product is stronger or officially certified. The functional statements on the label and in advertising should match the notified content. You can search by product name or notification number in the "Foods with Function Claims notification search" on the CAA website. If the advertising claims go beyond the notified content, or if no matching notification can be found, be cautious. The product information in the search result should match the product you are holding.

Asking the seller for a test report is reasonable. When you get the report, first check what was tested: the raw material or the finished product. If the label states the amount of sesamin per daily serving of the finished product, but the report only tested the raw material, the two do not match. Next, check whether the report includes a lot number. A report without a lot number does not tell you which batch it belongs to. If the seller gives only promotional screenshots and not the full report, you also cannot verify anything.

When reading a report, "not detected" does not mean the content is zero. Also check whether the report states the test method and the limit of detection (LOD) or limit of quantification (LOQ) (JRQ-D-016). Below the LOD only means it could not be measured, not that it is zero. The lot number on the bottle and outer box should be clearly readable and match each other. You can use the brand's official verification channel or list of authorized channels to match the lot number to the test report (JRQ-D-004). If the lot number on the bottle is worn off, removed, or does not match the outer box, the information cannot be checked; ask the seller for an explanation first.

Also check storage conditions. The label should state temperature, humidity, and how to store the product after opening. If it only gives a vague instruction such as "store in a cool, dry place," ask the seller for supporting storage information (JRQ-D-009). Whether the product can be kept after opening, and for how long, should also be stated on the label or in the instructions.

Verification checklist

In the table below, "adequate" means the information itself is clearly stated; it does not mean the product is compliant or effective.

Common misconceptions

• "If total sesame lignans are high, sesamin must be high." The total includes several lignans and does not necessarily reflect the amount of sesamin alone.
• "If the label says 'sesame extract,' it means the same as sesamin." The extract weight may include oil and other components, and is not the same as the weight of sesamin.
• "A Food with Function Claims notification means the Japanese government has certified the product as effective." It is a notification system, and the product's functional claims should match the notified content.
• "Having a test report is enough." The report must match the batch you bought, and what was tested must match the label.
• "For a combination product, getting the sesamin part right is enough." Ingredients such as vitamin E each have their own daily amounts, and they need to be checked separately.

Related JRQ standards

• JRQ-Q-033 Sesamin Quality Standard: distinguishes the amount of sesamin alone, total sesame lignans, and other components in sesame raw material.
• JRQ-Q-040 Quality Standard for Cell-Function-Related Combination Formulas: requires each ingredient in a combination product to be labeled separately, instead of using total weight or a single indicator as a substitute.
• JRQ-D-005 Certificate of Analysis Disclosure Standard: matching the certificate of analysis to what was tested, the lot number, and label claims.
• JRQ-D-004 Lot Labeling Standard: lot number position, legibility, and consistency with disclosed documents.

Scope of this guide

This guide only covers how to check Japanese sesamin labeling, FFC notification information, and test reports. It does not evaluate the effectiveness of any ingredient, and it does not recommend or certify any specific brand or product. If you are taking medicine, have a chronic condition, or are pregnant or breastfeeding, consult a doctor or pharmacist before purchase.

Other guides: Reading "research shows" claims · Checking safety information · Checking label dosage information · Ingredient identity and isomers · New ingredients: status and labeling · Checking comparison claims · Checking combination formulas · Checking certification claims · Checking overseas raw material claims · Checking regenerative medicine providers in Japan · Checking "stem cell" products · Storage and stability · Reading "not detected" · Lot numbers and authenticity · Production methods and impurities · Checking glutathione labels · Checking 5-ALA labels · Reading advertising terms · Questions to ask sellers · Checking cell storage services · Checking PQQ labels · Phosphatidylserine labels · Alpha-lipoic acid labels · Checking ergothioneine labels · Checking plasmalogen labels · Checking quercetin labels · Checking creatine labels · Berberine labeling and status