Borago Officinalis Ethyl Ester

Borago Officinalis Ethyl Ester is a derived ingredient from borage seed oil, one of the richest plant sources of gamma-linolenic acid (GLA). The ethyl ester form is a chemically modified version designed to improve stability and absorption in skincare formulations, making it more suitable for use in finished products than raw borage oil.In formulations, this ingredient functions primarily as a skin conditioner — it works to maintain and improve the skin's surface texture and hydration levels by supporting the skin's lipid barrier.

The mechanism centres on borage's high content of gamma-linolenic acid (GLA), an omega-6 polyunsaturated fatty acid. These essential fatty acids are key structural components of the skin's stratum corneum — the outermost protective layer. By supplying or supporting these lipids, the ingredient helps maintain the barrier's integrity.The ethyl ester form allows the active compounds to penetrate or be incorporated more effectively into formulations without oxidising, which would otherwise degrade the beneficial fatty acids.

This ingredient is typically found in moisturisers, serums, and balms rather than rinse-off products. There is no need for special application techniques — simply apply as part of your regular skincare routine. It works well alongside other conditioning and barrier-supporting ingredients such as ceramides, glycerin, and peptides. If using multiple rich conditioners, observe your skin's response to avoid over-conditioning, which may feel heavy on some skin types.

Borago Officinalis Ethyl Ester is generally well-tolerated across skin types and is not a known irritant or sensitiser. Those with borage seed oil sensitivity would likely want to avoid it, though this is rare.