Glossary
Oil extracted from seeds or nuts using mechanical pressure without the application of external heat (temperatures remain below 120 degrees F). Cold pressing preserves heat-sensitive compounds including vitamins, antioxidants, essential fatty acids, and enzymes that would be destroyed or degraded by conventional heat extraction methods.
Seeds and nuts contain oils rich in vitamins (A, E, K), essential fatty acids (linoleic, alpha-linolenic), antioxidants (polyphenols, carotenoids), and phytosterols. Many of these compounds are thermolabile: they degrade, oxidize, or denature when exposed to temperatures above 120 to 140 degrees F. Conventional oil extraction uses high heat and chemical solvents (hexane) to maximize yield, sacrificing these delicate compounds in the process. Cold pressing uses only mechanical force (hydraulic or screw press) with temperatures controlled below 120 degrees F, preserving the full spectrum of bioactive compounds.
Cold-pressed oils retain: natural vitamin E (tocopherol) at full potency for antioxidant protection. Intact essential fatty acids (polyunsaturated fats are particularly heat-sensitive). Natural color (from carotenoids and chlorophyll that heat destroys). Full aroma and flavor (characteristic scent of each oil). Phytosterols (anti-inflammatory plant sterols). Polyphenols (antioxidant compounds that heat degrades).
Lower yield: Cold pressing extracts less oil from the same amount of raw material, resulting in higher prices. Shorter shelf life: The same heat-sensitive compounds that make cold-pressed oils more beneficial also make them more prone to oxidation. Store in dark glass bottles, away from light and heat. Use within the timeframe recommended for each specific oil. Stronger scent and color: Unrefined cold-pressed oils have a more pronounced color and aroma than neutral refined oils, which some consumers may find too intense.
They overlap but are not identical. Cold-pressed refers specifically to the extraction method (mechanical, low temperature). Unrefined means no post-extraction processing (bleaching, deodorizing, winterizing). An oil can be cold-pressed but then refined (stripping some nutrients during post-processing). The best skincare oils are both cold-pressed AND unrefined (sometimes labeled 'virgin' or 'raw').
For skincare use, yes. The bioactive compounds preserved by cold pressing (vitamin E, polyphenols, intact essential fatty acids) are precisely the compounds you want in a facial oil. A refined oil is essentially a neutral lipid carrier stripped of its most valuable therapeutic components. The price difference reflects genuine quality difference.
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