The extraction method behind a botanical oil determines its chemical profile, shelf stability, and skin compatibility. Two methods dominate the industry: cold pressing and steam distillation. Understanding the difference helps you choose products that deliver what their labels promise.
Cold Pressing
Cold pressing applies mechanical force to seeds, nuts, or fruit flesh without external heat. The raw material enters a hydraulic or expeller press, and the resulting oil retains its full spectrum of fatty acids, tocopherols, and phytosterols. Because temperatures stay below 49 degrees Celsius throughout the process, heat-sensitive compounds like linoleic acid and vitamin E remain intact.
This method works best with oil-rich materials: jojoba seeds, argan kernels, sweet almond, avocado flesh, and rosehip seeds. The yield is lower than solvent extraction, which is why cold-pressed oils cost more per milliliter. The trade-off is purity. No hexane residues, no denatured proteins, no stripped antioxidants.
Steam Distillation
Steam distillation passes pressurized steam through plant material, typically leaves, flowers, bark, or roots. The steam ruptures cell walls and carries volatile aromatic compounds into a condenser, where the vapor cools into a liquid. The result separates into two layers: the essential oil floats above the hydrosol (floral water).
This method captures terpenes, esters, and phenols that give essential oils their therapeutic and aromatic properties. Lavender, tea tree, eucalyptus, and peppermint are all steam-distilled. The process requires precise temperature and pressure control. Too much heat degrades linalool in lavender; too little pressure fails to extract eugenol from clove.
Why It Matters for Your Skin
A cold-pressed carrier oil delivers lipid-soluble nutrients directly. Your skin absorbs them through the intercellular matrix of the stratum corneum. A steam-distilled essential oil delivers volatile actives that interact with receptors and pathways differently: anti-inflammatory, antimicrobial, or circulatory, depending on the plant.
When we formulate at Heliox Goods, we pair cold-pressed carriers with steam-distilled actives at concentrations backed by published dermatological research. Every product page lists both the extraction method and the source region, so you know exactly what you are putting on your skin and how it got there.