A nutrient-dense vegetable oil that provides significant emollient benefits and skin-softening properties. It is valued for its high concentration of fatty acids that reinforce the skin’s lipid barrier and prevent transepidermal water loss.
- INCI Name:
- Arachis Hypogaea (Peanut) Oil
- Chemical/Scientific Name:
- Arachis Hypogaea Oil
- Common Aliases:
- Groundnut Oil, Peanut Oil
| Category: | Softeners |
| Source Origin: | Botanical (Peanut seeds) |
| Comedogenic Rating: | 2 |
| Primary Industries: | Cosmetics, Pharmaceuticals, Food |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects:
| Hydration/Moisture | |
| Barrier Repair | |
| Soothing/Calming | |
| Irritation Risk | |
| Comedogenicity |
- Primary Benefits: Deeply moisturizes the stratum corneum, supports the skin’s natural lipid mantle, and provides a smooth texture to formulations.
- Potential Risks: May pose a risk to individuals with severe peanut allergies if the oil is unrefined; moderate potential for pore clogging in acne-prone individuals.
Biological Action & Cosmetic Profile:
Characterized by a high percentage of monounsaturated and polyunsaturated fats, this botanical lipid primarily functions as an occlusive emollient. It contains significant levels of Oleic Acid (40–60%) and Linoleic Acid (20–35%), alongside smaller amounts of Palmitic Acid and Stearic Acid. These fatty acids integrate into the intercellular matrix of the skin, filling gaps between desquamating corneocytes to restore a supple, smooth surface.
The specific chemical composition also includes Tocopherol (Vitamin E), a potent antioxidant that helps protect skin lipids from oxidative stress. By forming a breathable film on the skin surface, the oil significantly reduces transepidermal water loss (TEWL). This mechanism is vital for maintaining skin elasticity and preventing the micro-cracking associated with xerosis or environmental damage.
Dermatological application of refined vegetable oils like this one facilitates the delivery of fat-soluble vitamins and active ingredients. Because it shares structural similarities with human sebum, it is often utilized in massage oils and heavy creams to improve spreadability and skin-feel without the “greasy” residue associated with heavier mineral waxes.
Broader Applications & Origins:
While frequently associated with the culinary industry, the cosmetic use of this oil dates back decades in European and American pharmacopeias. It serves as a foundational carrier oil in medicated ointments and intramuscular injections due to its high stability and compatibility with various drug compounds. In personal care, it is commonly found in baby products, soaps, and hair conditioners where intensive lipid replenishment is required.
Routine Integration:
- Synergies: Works effectively alongside other barrier-supporting agents like Squalane or humectants such as Glycerin to balance moisture retention.
- Conflicts: No chemical conflicts identified, though users with highly reactive or acne-prone skin should monitor for comedogenicity when used in high concentrations.
Clinical Consensus & Safety:
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated Arachis Hypogaea (Peanut) Oil multiple times, most recently reaffirming its safety in refined forms. The refining process (neutralization, bleaching, and deodorizing) effectively removes the protein fractions responsible for triggering allergic reactions in peanut-sensitive individuals. Clinical data indicates that the refined oil does not induce sensitization or significant irritation in the general population. However, the SCCS and other regulatory bodies emphasize that only refined oil—demonstrably free of detectable protein—should be used to ensure consumer safety.
Is Arachis Hypogaea (Peanut) Oil safe for people with peanut allergies?
Refined peanut oil used in cosmetics is generally considered safe because the allergic proteins are removed during the refining process. Individuals with extreme sensitivities should still consult a physician or perform a patch test before use.
Will this oil cause breakouts or acne?
With a comedogenic rating of 2, the oil is considered low-to-moderate in terms of pore-clogging potential. While most skin types tolerate it well, those with very oily or active acne-prone skin may prefer lighter oils.
What are the main skin benefits of using products with this oil?
The primary advantages include improved skin softness, reduced dryness through occlusive protection, and the delivery of antioxidant Vitamin E to help combat environmental stressors.