Phosphatidylserine is rarely sold as a pure substance. What a supplier ships is usually a phospholipid material in which phosphatidylserine is one component, at a stated content, together with other phospholipids, carriers or oil. Two offers called “phosphatidylserine” can therefore differ in content, physical form, lecithin source and allergen profile, and the label calculation for a finished product changes with each of them.
This guide is for supplement and food manufacturers, capsule and softgel fillers, OEM factories and brands that buy phosphatidylserine as a raw material for their own production. It covers how to specify the source, the content and the form, what to check on the documents, and how its status differs by country as far as we could confirm it. If you would rather have the finished product made in Japan, see our phosphatidylserine supplement OEM guide.
Health supplements are foods, not medicines, and are not a substitute for medical treatment. This article is about the raw material and its paperwork; it makes no claim about what phosphatidylserine does in the body.
💬 Buying phosphatidylserine for your own production? We source it by source, content and form, and send the supplier’s specification, CoA and SDS before you order. See ingredients and packaging supply.
Start with the source of the lecithin
Commercial phosphatidylserine is typically made by enzymatically modifying lecithin, so the plant source of that lecithin decides your allergen statement, your origin file and any non-GMO question your market asks.
A record in the US Food and Drug Administration’s GRAS notice inventory describes the substance plainly as “soy lecithin enzymatically modified to have increased phosphatidylserine”. In that route, lecithin from a plant source is treated with an enzyme so that a larger share of its phospholipids becomes phosphatidylserine. Soy lecithin is a common source; materials made from other lecithins, such as sunflower, are also offered.
| Source on the specification | What follows for your files | What to ask |
|---|---|---|
| Soy lecithin | Soybean is on many countries’ allergen lists; Japan lists it among recommended rather than mandatory items | Allergen statement against your country’s list; non-GMO or identity-preserved statement if you need one |
| Sunflower lecithin | Different allergen profile from soy; check your own list | Confirmation that no soy lecithin is blended in, and the production line’s allergen handling |
| Other or unstated source | Your allergen and origin files cannot be completed | Ask for the source in writing before you test a sample |
Ask also which enzyme and other processing aids are used, as far as the supplier will disclose them. Your halal or kosher certification body, or your own regulator, may ask the same question.
Content and how it is measured
State the phosphatidylserine content you need, the basis it is expressed on and the method used, because content varies widely between grades and there is no public Japanese standard for it.
The Japanese Pharmacopoeia, 19th edition, has no monograph for phosphatidylserine. The content figure on a specification therefore comes from the supplier’s own method, typically a liquid chromatography method for phospholipids. The Japanese Pharmacopoeia describes liquid chromatography only as a general technique (Liquid Chromatography ⟨2.01⟩); the column, conditions and calculation are the supplier’s.
| Specification line | What to look for |
|---|---|
| Phosphatidylserine content | Figure, basis (as-is or on a stated base) and method |
| Other phospholipids | Whether other phospholipids are reported, and how |
| Carriers or oil | Name and source of every carrier or oil in powder or fluid grades |
| Fatty-acid profile | Reported if your customer or your regulator asks for it |
| Water or loss on drying | Limit and method |
| Peroxide value or other oxidation indicators | Where the supplier tests them, with limits |
| Residual solvents | Which solvents are tested, if any are used in production |
| Heavy metals and microbiology | Limits and methods your regulator recognises |
Two practical consequences:
- Your label dose depends on the content figure. If a grade contains a fraction of phosphatidylserine by weight, the amount of raw material per serving rises accordingly, and so does the fill weight of a capsule or tablet. Check that the grade fits your dosage form before comparing prices.
- Incoming testing needs the method. If your laboratory or an outside laboratory will test each lot, ask for the method summary early. Phospholipid methods are not all equivalent, and a different method can give a different figure on the same lot.
Our certificate of analysis guide shows how to check each CoA result against the specification line it belongs to.
Powder or fluid grade
Choose the physical form that matches your production line: powders suit tablets, hard capsules and powder blends, while fluid or oil-based grades suit softgel filling.
| Physical form | Fits | What to weigh up |
|---|---|---|
| Powder | Hard capsules, tablets, powder sticks | Flow and compression behaviour, moisture uptake, carrier materials |
| Fluid or oil-based grade | Softgel filling | Viscosity at filling temperature, carrier oil and its source, oxidation protection |
| Blend with other ingredients | Premixes for a specific formula | Every component appears on your label and allergen file |
Phospholipid materials can be sensitive to heat, air and moisture. The storage condition is set by the supplier and stated on its specification and safety data sheet; follow it through the factory, port, bonded warehouse and your own store, and choose a pack size that matches your batch so packs are not opened repeatedly.
💬 Not sure which phosphatidylserine grade fits your capsule or tablet? Send us your dosage form, target amount per serving and country of use. Ask about phosphatidylserine.
Documents to expect with each lot
Each lot comes with the specification, a certificate of analysis for that lot, a safety data sheet, and allergen and origin information, with the lecithin source stated in writing.
| Document | For phosphatidylserine, check especially |
|---|---|
| Specification | Lecithin source, content with method and basis, physical form, carriers or oil |
| Certificate of analysis | Lot number matching the drum label, content result, oxidation indicators if specified, manufacture and expiry or retest dates |
| Safety data sheet | Composition matches the grade ordered; storage and handling |
| Source, allergen and GMO statement | Plant source, yes or no against your allergen list, non-GMO statement if needed |
| Origin information | Country where the lecithin was produced and where the phosphatidylserine was made |
| Other certificates if your market asks | Halal or kosher certificates naming the product and valid on the shipment date |
Origin is worth a second look. The lecithin and the finished phosphatidylserine may come from different countries, and your customs broker, your customer or your certification body may each ask about a different stage. The general rules on samples, shelf life on arrival and shipment are in our guide to buying Japanese raw materials in bulk.
How phosphatidylserine is treated in different countries
Japan lists phosphatidylserine among substances not judged to be medicines unless a medicinal effect is claimed; for every other market, the manufacturer confirms the current rule in the country of use.
| Country | What we confirmed in a primary source | What it does not tell you |
|---|---|---|
| Japan | The Ministry of Health, Labour and Welfare list of substances not judged to be medicines unless a medicinal effect is claimed names phosphatidylserine (version updated 5 August 2026) | Label wording, amounts, or any status outside Japan |
| United States | The FDA GRAS notice inventory records a notice for soy lecithin enzymatically modified to have increased phosphatidylserine, closed in July 2006 with the response “FDA has no questions” | Whether another supplier’s material, source or intended use is covered |
| Other markets | Not checked here | The manufacturer confirms the current rule in the country of use |
A GRAS notice relates to the notifier’s own substance and intended uses. If your route to a market depends on a particular notice or authorisation, ask whether it covers the material you are buying. In every case, the manufacturer confirms the current rule in the country of use, and the importer handles clearance and any import notification. We supply the documents that confirmation and clearance depend on.
Before you ask for a quotation
A supplier can quote quickly once the source, content, form, quantity and country of use are fixed.
- Lecithin source, and whether a non-GMO statement is needed
- Phosphatidylserine content, with the basis and method you accept
- Powder or fluid grade, and the carriers you can accept
- Your allergen list
- Quantity per order and pack size per batch
- Storage and transport condition you can provide
- Country of use and any certificates your customer asks for
We do not quote a price or a lead time before the specification is agreed. Other single-ingredient guides in this series cover coenzyme Q10 and ubiquinol and NMN. If the same run needs empty capsules, see our HPMC capsule guide.
💬 Ready to source phosphatidylserine? Tell us the source, content, form, quantity and country of use, and we will send suppliers’ specifications and arrange a sample. Send your request.
Frequently asked questions
1. Is phosphatidylserine raw material pure phosphatidylserine?
Usually not. Most grades are phospholipid materials in which phosphatidylserine is one component at a stated content, with other phospholipids, carriers or oil. Read the content figure and the composition before you calculate your label amount.
2. Why does the lecithin source matter?
It decides your allergen statement, your origin file and any non-GMO question. Soy lecithin is a common source; other sources such as sunflower are also offered. Ask for the source in writing.
3. Is there an official standard for phosphatidylserine content?
We found no monograph in the Japanese Pharmacopoeia, 19th edition. The content figure comes from the supplier’s own method, usually liquid chromatography, so ask for the method and basis before comparing grades.
4. Should I choose a powder or a fluid grade?
Choose by production line. Powders suit hard capsules, tablets and powder sticks; fluid or oil-based grades suit softgel filling. Either way, every carrier must appear on your label and allergen file.
5. Can phosphatidylserine be used in foods in my country?
That depends on the country. Japan lists it among substances not judged to be medicines unless a medicinal effect is claimed, but that applies only in Japan. The manufacturer confirms the current rule in the country of use; we supply the specification, CoA, SDS, source and origin information the check relies on.
Checked on 25 October 2026. Sources: Ministry of Health, Labour and Welfare, list of substances not judged to be medicines unless medicinal effects are claimed, attachment 2, updated 5 August 2026 (mhlw.go.jp/content/001734639.pdf); US Food and Drug Administration, GRAS Notice Inventory, GRN 186, “Soy lecithin enzymatically modified to have increased phosphatidylserine” (hfpappexternal.fda.gov), and agency response letter to GRN 636 on phosphatidylserine derived from sunflower lecithin, a notice withdrawn in July 2016 and cited here only as a record that sunflower-derived material is made (fda.gov); Consumer Affairs Agency, “What is allergen labelling”, April 2026 (caa.go.jp); Ministry of Health, Labour and Welfare, The Japanese Pharmacopoeia, 19th edition, official monographs (mhlw.go.jp/content/11120000/001689418.pdf) and 18th edition English version, general tests (mhlw.go.jp/content/11120000/000945683.pdf). Rules on using phosphatidylserine in foods differ by country; the manufacturer confirms the current rule in the country of use.