Soybean oil has a comedogenic rating of 2 on a scale of 0 to 5, placing it in the “slightly comedogenic” category. That means it carries a low-to-moderate risk of clogging pores. For many people, this won’t cause breakouts, but if your skin is already prone to acne or congestion, it’s worth understanding what that rating actually means in practice.
What a Rating of 2 Means
The comedogenic scale runs from 0 (won’t clog pores at all) to 5 (highly likely to clog pores). A rating of 2 means soybean oil does not clog pores for most people, but it can for some, particularly those with oily or acne-prone skin. For comparison, coconut oil scores a 4, making it far more likely to trigger breakouts. Oils like argan (0) and hemp seed (0) sit at the bottom of the scale, while olive oil lands around 2 to 3.
These ratings come from older patch-test studies, and they’re not perfect. They were typically performed on rabbit ears, not human faces, and they don’t account for how an oil behaves when blended into a larger formula. Still, the scale gives a useful rough guide. A 2 is low enough that soybean oil appears in thousands of cosmetic products without widespread reports of breakouts.
Why Fatty Acid Composition Matters
Soybean oil is roughly 55% linoleic acid, 18% oleic acid, 13% linolenic acid, 10% palmitic acid, and 4% stearic acid. That high linoleic acid content is actually a point in its favor. Linoleic acid is a lighter fatty acid that tends to absorb more readily into skin without leaving a heavy residue. People with acne-prone skin often have lower levels of linoleic acid in their natural sebum, and oils rich in it are generally better tolerated than oils heavy in oleic acid.
Oleic acid, by contrast, is thicker and more occlusive. It’s the dominant fatty acid in oils like olive oil and avocado oil, both of which score higher on the comedogenic scale. At only 18% oleic acid, soybean oil is lighter than those alternatives, which partly explains its moderate rating. The balance of fatty acids in an oil matters more than any single ingredient when predicting how your skin will react.
How Soybean Oil Affects the Skin Barrier
Soybean oil penetrates the outermost layer of skin (the stratum corneum) rather than just sitting on top of it. This makes it effective as a moisturizer, because it helps reduce water loss through the skin’s surface. A 2023 systematic review published through the National Institutes of Health found that topical soy-based products improved skin hydration and barrier function across multiple studies, with topical application outperforming oral supplementation for those benefits.
The same review noted that soy-derived ingredients showed positive effects on acne lesion counts in some studies. This sounds counterintuitive for an oil with any comedogenic potential, but soybean oil contains compounds with anti-inflammatory properties that may offset its mild pore-clogging tendency. The net effect depends heavily on how the oil is formulated, how much is used, and what else is in the product.
Who Should Avoid It
If you break out easily from oils and moisturizers, a comedogenic rating of 2 is enough to warrant caution. You don’t need to treat soybean oil as a hard no, but patch testing is a smart move. Apply a small amount to your jawline or another breakout-prone area for a week and watch for new clogged pores or small bumps.
People with dry or normal skin are unlikely to have problems. For these skin types, soybean oil’s combination of linoleic acid and barrier-supporting properties can be genuinely helpful, especially in richer creams and cleansing oils where it’s blended with other ingredients. The comedogenic potential of any single oil drops when it’s diluted in a well-formulated product rather than applied straight to skin.
Spotting Soybean Oil on Labels
Soybean oil doesn’t always appear by its common name on ingredient lists. The standard cosmetic labeling name (INCI name) is Glycine Soja (Soybean) Oil. You may also see it listed as Glycine Max Oil, depending on the product’s country of origin and labeling conventions. The Cosmetic Ingredient Review panel has assessed soybean oil as safe for use in cosmetics at current concentrations, so its presence in a product isn’t a safety red flag. It simply means you should know it’s there if you’re tracking which ingredients your skin tolerates.
Lower-Risk Alternatives
If you want to avoid even a slight comedogenic risk, several plant oils score 0 to 1 on the scale:
- Hemp seed oil (0): Very high in linoleic acid, lightweight, and well-suited for oily skin.
- Sunflower seed oil (0): Another linoleic-acid-rich option with strong research supporting its barrier repair properties.
- Argan oil (0): Slightly richer in oleic acid but still non-comedogenic, good for normal to dry skin.
- Jojoba oil (2): Technically a wax ester rather than an oil, it closely mimics human sebum. It shares the same rating as soybean oil but is often better tolerated because of its unique structure.
Soybean oil sits in a middle zone: it’s not as risky as coconut oil or cocoa butter, but it’s not as safe a bet as hemp seed or sunflower oil for breakout-prone skin. For most people, a product containing soybean oil as one ingredient among many won’t cause issues. If you’re using it as a standalone facial oil and you tend toward clogged pores, switching to a 0-rated alternative removes the guesswork entirely.