A deeper reading library covering our current raw materials and other widely used botanical oils.
Plant oils are raw materials, not a single category with universal benefits. Their behavior depends on fatty-acid composition, refining, oxidation stability, the amount used and whether the formula is a rinse-off soap or a leave-on oil. The first six materials listed here are on the pictured Luma Botanics Castile Soap label; the remaining ingredients are common industry references, not ingredients currently claimed for that soap.
In soapmaking, triglycerides react with alkali to produce fatty-acid salts and glycerol. In an unsaponified botanical oil blend, the original oil remains part of the applied product. These are very different exposure conditions, so we explain them separately.
Choose a starting material to read more about its chemistry, uses and limits.
Used in our original Castile Soap
Cocos nucifera · Lauric and myristic triglycerides
Formulation context: Soapmaking.
Its relatively high proportion of medium-chain saturated fatty acids can yield soaps with ready lather and robust cleansing action. At higher inclusion rates, soap can feel more cleansing than some users prefer.
What to consider: Do not mistake the properties of unsaponified coconut oil for proven effects of finished coconut-oil soap.
Continue in Resources →Used in our original Castile Soap
Elaeis guineensis (kernel) · Lauric and myristic acids
Formulation context: Soapmaking.
Palm kernel oil and palm fruit oil are compositionally different. The kernel-derived oil is often used for lather and cleansing; sustainability sourcing should be assessed separately from performance.
What to consider: A natural origin does not resolve questions around land use or traceability.
Continue in Resources →Used in our original Castile Soap
Olea europaea · Oleic-rich triglycerides
Formulation context: Soapmaking and personal care.
Olive oil has a long history in regional soap traditions. Oleic-rich soap blends often have a different foam character from lauric-rich formulations, and performance changes with dilution and processing.
What to consider: An olive-oil starting material does not mean that olive oil remains unchanged in soap.
Continue in Resources →Used in our original Castile Soap
Ricinus communis · Ricinoleic acid
Formulation context: Soapmaking and formulated oils.
Castor oil is distinguished by its hydroxylated fatty acid profile. Soapmakers use it in blends to influence lather behavior and solubility; the balance matters more than one oil on its own.
What to consider: Claims about castor oil on hair or skin cannot be transferred automatically to saponified soap.
Continue in Resources →Used in our original Castile Soap
Cannabis sativa (seed) · Linoleic and alpha-linolenic acids
Formulation context: Formulated botanical oils.
Hemp seed oil contains abundant polyunsaturated fatty acids. In soap it contributes to the starting fatty-acid profile; in an anhydrous oil product, oxidative stability and packaging become especially important.
What to consider: Seed oil is not the same as cannabinoids; do not imply THC or CBD activity.
Continue in Resources →Used in our original Castile Soap
Simmondsia chinensis · Long-chain liquid wax esters
Formulation context: Cosmetic oil blends.
Jojoba is chemically unusual: it is largely composed of liquid wax esters rather than the triglycerides common in culinary oils. Its behavior depends on the finished formulation and whether it is reacted or retained.
What to consider: Do not assume the same performance in a soap as in a leave-on product.
Continue in Resources →General reference — not on our Castile Soap label
Prunus amygdalus dulcis · Oleic and linoleic acids
Formulation context: General botanical reference.
A widely used emollient starting material for oil-based cosmetics. It can influence sensory feel in leave-on blends; in soapmaking its triglycerides are transformed.
What to consider: Check nut-allergy considerations and supplier documentation. Not claimed as a Luma ingredient.
Continue in Resources →General reference — not on our Castile Soap label
Helianthus annuus · Linoleic or high-oleic profiles
Formulation context: General botanical reference.
Sunflower oil is available in fatty-acid profiles that vary by cultivar. Formulators choose between these grades based on oxidation stability and the intended product type.
What to consider: INCI names alone do not prove a particular fatty-acid composition.
Continue in Resources →General reference — not on our Castile Soap label
Persea gratissima · Oleic-rich triglycerides and unsaponifiables
Formulation context: General botanical reference.
Used in cosmetic oils and soaps for its blend of triglycerides and minor unsaponifiable components. Processing and refinement influence color, odor and stability.
What to consider: Benefits in leave-on oil do not automatically transfer to rinsed-off soaps.
Continue in Resources →General reference — not on our Castile Soap label
Argania spinosa · Oleic and linoleic acids
Formulation context: General botanical reference.
Frequently used in hair and skin oils as a leave-on emollient ingredient. Purity, oxidation and blending concentration influence the final user experience.
What to consider: Do not equate cosmetic conditioning with hair growth or medical treatment.
Continue in Resources →General reference — not on our Castile Soap label
Vitellaria paradoxa · Stearic and oleic fractions
Formulation context: General botanical reference.
A semisolid fat often used for structure and sensory richness in creams, balms and bar soap formulas. In a liquid formulation its processing behavior needs deliberate design.
What to consider: Botanical origin does not guarantee non-comedogenicity or absence of allergy.
Continue in Resources →General reference — not on our Castile Soap label
Cucurbita pepo · Linoleic and oleic acids
Formulation context: General botanical reference.
An oil used in cosmetic blends for its fatty-acid profile and characteristic color. Refined versus unrefined material may differ substantially in odor and oxidation stability.
What to consider: Evidence for medicinal or hair-growth results is not established by ingredient inclusion alone.
Continue in Resources →Ask whether a claim refers to a raw oil, an isolated component, or a finished product; whether the product is rinse-off or leave-on; and whether a human study used the same dose, formulation and exposure. Ingredient stories are informative, but they are not substitutes for evidence about the final product.
Further reading: FDA — Frequently Asked Questions on Soap ↗ · DermNet — Soaps and cleansers ↗.