What is castor seed oil?

Castor seed oil is a plant oil pressed from the seeds of Ricinus communis. It is a triglyceride oil with a distinctive fatty acid profile, largely made up of ricinoleic acid, which gives castor oil its thicker texture and unique feel on skin.

What does castor seed oil do for the skin?

Castor seed oil works mainly as an emollient, helping to soften the skin and reduce moisture loss by forming a protective oil layer on the surface. Its naturally viscous texture also adds richness and cushioning to skincare formulations.

Is castor seed oil suitable for dry skin?

Castor seed oil can be helpful for dry skin because it reduces transepidermal water loss when used as part of a blend or balm. Many people prefer it combined with lighter oils to improve spreadability.

Is castor seed oil good for sensitive or reactive skin?

Many people tolerate castor oil well, but individual skin responses vary. Because it is a thick oil, it is best introduced gradually and patch tested first, especially for highly reactive skin.

Will castor seed oil clog pores?

Comedogenic ratings are not a perfect predictor of how skin will respond. Castor oil can feel heavy for some skin types, so acne-prone users often prefer it at low percentages within a blend.

How is castor seed oil commonly used in skincare formulations?

Castor oil is commonly used to add viscosity, gloss, and slip. It is frequently found in cleansing oils, balms, lip products, and body oils where a richer, more protective texture is desired.

How do I use castor seed oil at home?

Castor seed oil is often best used as part of a blend rather than on its own. Mixing a small amount with lighter carrier oils can reduce tackiness and improve spread before applying a thin layer to slightly damp skin.

Is castor seed oil safe to use during pregnancy?

For topical use, castor seed oil is commonly used in cosmetic and personal care products. Patch testing and conservative use are sensible during pregnancy. Castor oil should not be ingested unless advised by a qualified health professional.

Does castor seed oil have a strong scent?

Castor seed oil typically has a mild, slightly nutty to earthy aroma. In most blends it does not dominate and can be easily scented if desired.

How should castor seed oil be stored?

Castor seed oil should be stored tightly sealed, away from heat and direct sunlight and ideally in glass. Keeping it cool and limiting air exposure helps maintain freshness.

Is castor seed oil used for hair or eyelashes?

Castor seed oil is commonly used in hair and lash care because its thick texture helps coat and condition the hair shaft, reducing dryness and breakage. While it is widely used to improve the appearance and feel of hair and lashes, there is limited clinical evidence that it directly stimulates new hair growth.

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Castor Seed Oil - Certified Organic

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Size 100ml - Glass Bottle 200ml - Glass Bottle 500ml - Glass Bottle 500ml - Glass Bottle with Pump Top 1000ml - HDPE Plastic Bottle 5000ml - HDPE Plastic Bottle

Cold-pressed from the seeds of the Ricinus communis plant, Zurma’s Certified Organic Castor Seed Oil is a dense, viscous (thick and slow-flowing) botanical lipid (plant-derived fat). Characterised by its pale straw colour and mild, earthy scent, this unrefined fixed oil features a chemical composition dominated by ricinoleic acid (a specialised fatty acid unique to the castor bean). Within cosmetic formulation and therapeutic body care, Castor Seed Oil functions as a reliable emollient (skin-softening agent) and natural humectant (a substance that attracts and retains moisture). It adheres closely to the stratum corneum (the outermost layer of the skin), providing sustained occlusion (creating a physical seal over the skin surface to trap moisture) to minimise transepidermal water loss (the evaporation of water through the skin) while softening dry, calloused, or compromised tissue.

Skincare Ritual & Well-being Applications: The specific molecular structure of Ricinus communis makes it a functional active for skin barrier support and hair conditioning. As documented in authoritative lipid literature, the hydroxyl group (a specific oxygen-hydrogen bond in the molecule) within ricinoleic acid gives the oil polar characteristics (water-attracting properties) rarely seen in standard vegetable oils, making it an effective solvent in oil-cleansing formulas to lift lipid-soluble debris from pores without stripping natural sebum (the skin's natural oil) [2]. In trichology (hair and scalp care) as well as brow and lash conditioning, its dense coating action smooths the hair cuticle (the overlapping outer scales of the hair shaft), helping to reduce mechanical breakage and increase surface gloss [3]. Additionally, Castor Seed Oil serves as the traditional medium for external warm packs and joint compresses, where its slow absorption rate supports prolonged topical contact.

Technical Specifications & Botanical Identity:

Product Type: 100% Pure Fixed Vegetable Oil (Carrier Oil)

Botanical Name: Ricinus communis

Extraction Method: Cold-Pressed - Hexane Free (Certified Organic)

Organic Certifier: BioGro

Plant Part Processed: Seeds

Lipid Profile Focus: High concentration of Ricinoleic Acid (typically 85–90%), alongside Oleic Acid (Omega-9) and Linoleic Acid (Omega-6)

Absorption Rate: Slow; high viscosity (thickness) creates a durable, protective barrier on the skin surface and hair shaft

Formulation & Safety Guidelines:

Application: Designed for targeted barrier balms, intensive hair and scalp conditioning treatments, oil-cleansing blends, natural lip care formulations, and traditional topical compresses.

Dermal Limits & Clinical Safety: Castor Seed Oil is generally regarded as safe for topical application. Because of its dense viscosity (thickness) and distinct drawing properties, blending it with lighter carrier oils—such as Coconut Oil Fractionated (MCT) or Almond Oil Sweet —at concentrations between 10% and 30% improves dermal spreadability across larger surface areas [1]. Note that during cold-pressing and filtration, the water-soluble protein ricin remains entirely in the solid seed mash and is absent from the expressed lipid [2].

Storage & Degradation: Due to the chemical structure of ricinoleic acid, Castor Seed Oil resists oxidation (chemical breakdown from oxygen exposure) more effectively than many standard polyunsaturated carrier oils. To maintain purity, keep the container tightly sealed and store in a cool, dark environment away from direct UV light and heat. When stored correctly, cold-pressed Castor Seed Oil maintains a stable shelf life of 18 to 24 months.

Critical Warnings: For external cosmetic and topical use only. Do not ingest. Keep out of reach of children. Perform a standard patch test prior to regular use, particularly when applying near the delicate eye area.

Packaging note
Our 1L and 5L sizes are supplied in food grade, cosmetic approved HDPE bottles. For those who prefer glass, we recommend decanting into a glass container and storing away from light.

Primary fatty acid profile for this current batch is:
C18:1 Ricinoleic: 88.0%

C18:1 Oleic: 3.50%

C18:2 Linoleic: 3.95%

C18:3 Linolenic: 0.30%

References:

[1] Tisserand, R., and Young, R. Essential Oil Safety: A Guide for Health Care Professionals (2nd ed.), 2014.

[2] Parker, S. M. Power of the Seed: Your Guide to Oils for Health & Beauty, 2014.

[3] Kusmirek, J. Liquid Sunshine: Vegetable Oils for Aromatherapy, 2002.

Download the Safety Data Sheet (SDS) below for essential information on safe handling, potential hazards, and emergency procedures for this product.

Download SDS

General Disclaimer
The product information provided on this website is intended for educational purposes only. The information provided is not considered to be complete and is not guaranteed to be accurate. The information contained in this website is not intended to be sufficient to provide diagnosis and/or treatment of medical conditions. It is recommended that treatment of serious health conditions be done with the help of a trained qualified medical practitioner.

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To ensure our essential oils are not diluted to adulterated, Zurma Essential Oils undergo rigorous testing, including Certificate of Analysis (COA) and Gas Chromatography-Mass Spectrometry (GCMS) analysis. This meticulous testing process guarantees the purity, potency, and authenticity of our oils.

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Castor Seed Oil - Certified Organic