Quick answer: a search for the glycine soja seed extract comedogenic rating mostly returns pages about soybean oil. Those pages are scoring a different INCI. Glycine Soja (Soybean) Seed Extract is a solvent extract of the seed. Glycine Soja (Soybean) Oil is the triglyceride oil. Consumer comedogenic charts were built for oils, butters, and fatty esters. They do not measure a hydroglycolic extract, and the Cosmetic Ingredient Review soy assessment does not give this extract a 0–5 score.
Identity, isoflavone markers, and the reported use level are in Glycine Soja Seed Extract for Skin Is Not Soybean Oil.
Why an oil chart does not transfer
A comedogenic score is an assay on a tested material, often an undiluted oil or a simple vehicle. Moving that score onto another soy INCI assumes the two materials deliver the same lipid load to the follicle. A water, glycerin, or hydroglycolic seed extract is mostly solvent plus polar constituents: isoflavones, saponins, and, depending on the process, some protein. Residual oil in that grade can be low. A hexane fraction, or an extract that still carries a large lipid phase, can be the opposite material under a similar common name.
CIR’s composition summary shows how wide that gap is. It did not receive a composition dossier for the cosmetic seed-extract INCI itself. In the published extracts it reviewed, one n-hexane soy extract was about 0.11% total isoflavones, while certain dry germ extracts were about 26% to 40%. Solvent choice changes what is in the drum. An oil chart does not capture that choice, and it does not become a COA line because a blog printed 0 or 1 next to “soybean.”
Ingredient blogs that assign a single comedogenic digit to “glycine soja seed extract” are copying one another. They are not a method you can hand to quality, and they are not a test reference a customer can audit.
Four soy materials, four purchase lines
| Brief says | What it actually is | What to lock |
|---|---|---|
| Glycine Soja (Soybean) Seed Extract | Solvent extract of the seed | Solvent, plant part seed, residual lipid if the claim needs it |
| Glycine Soja (Soybean) Oil | Triglyceride oil; the usual chart target | Oil INCI and oil phase; do not paste its chart score onto the extract |
| Glycine Soja (Soybean) Germ Extract | Germ, not the whole seed | Plant part germ; do not inherit 26–40% isoflavone figures unless that COA shows them |
| Glycine Soja (Soybean) Sterols | Oil-soluble phytosterol fraction | Barrier-lipid INCI; not a water-phase extract |
Glycine Soja (Soybean) Sterols are barrier lipids. Glycine Soja (Soybean) Germ Extract is still an extract, not the oil. Read its solvent the same way you read the seed extract. Do not borrow the oil’s chart line for either one. A single chart row labeled “soybean” does not describe all four.
What to put on the specification instead of a borrowed score
For a lightweight gel, a blemish-prone line, or any formula whose brand team will be asked for a comedogenic rating, write these lines into the raw-material specification:
- INCI Glycine Soja (Soybean) Seed Extract, plant part seed
- Solvent and physical form: water, glycerin, a glycol, ethanol, or an oil carrier; liquid or powder
- Residual lipid, or a statement that the grade is a water-phase extract with no added oil
- Use level from the TDS of that grade, not from an oil chart
In the 2016 industry survey cited by CIR, reported use of the seed extract reached up to 2% in face and neck products. That figure is a concentration-of-use record. It is not a comedogenic clearance, and it is not an instruction to dose every formula at 2%.
If a customer requires “non-comedogenic” substantiation, that is a finished-product question. It depends on the whole chassis. Removing soybean oil while leaving isopropyl myristate, ethylhexyl palmitate, or a heavy butter in the oil phase does not settle the question. The seed extract is one line in that chassis.
What to check on the bench
If the sample is a clear water-phase liquid, do not screen it as soybean oil, and do not put it in the oil phase. If the sample is cloudy, oily, or offered as an oil-soluble fraction, confirm whether the shipment is the oil or a lipid-rich extract before anyone accepts a “non-comedogenic extract” line from a broker sheet.
Match the sample COA to the solvent and plant part you specified. Reject a lot whose carrier does not match the grade. Reject a lot that substitutes the oil, the germ extract, or the sterol fraction under a “soybean extract” subject line.
What to send before the first sample ships
- INCI Glycine Soja (Soybean) Seed Extract
- Plant part: seed; explicit note that the brief is not the oil
- Solvent, physical form, and residual-lipid expectation
- Statement that you are not accepting a borrowed 0–5 comedogenic score in place of those lines
- Bench-sample pack size, plus COA, SDS, and TDS
Documents and a sample for the seed extract are on the product page. Match the sample COA to the solvent and plant part you wrote, then scale.
