Ozonized Linseed Oil: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 30, 2025
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We verify all information on this page using publicly available nomenclature standards from The Personal Care Products Council (PCPC), the European Commission's CosIng database and documentation provided directly by ingredient manufacturers. Our analysis is based on technical data from these sources to ensure accuracy and reliability.

What Is Ozonized Linseed Oil?

Ozonized Linseed Oil begins with linseed oil, the golden fluid pressed from the seeds of the flax plant Linum usitatissimum. Rich in alpha linolenic acid and other omega 3 fatty acids, plain linseed oil has long been valued for its nourishing feel on skin. When ozone gas is carefully bubbled through this oil at low temperature the unsaturated fatty acids react with ozone to form stable ozonides and peroxides. These new compounds give the oil a thicker texture and a fresh, faintly medicinal scent while keeping many of the original fatty acids intact.

The idea of pairing ozone with plant oils dates back to the early 1900s when chemists explored ozone’s ability to purify and preserve. Over time formulators noticed that ozonized oils stayed fresher longer and felt soothing on the skin, which opened the door to their use in beauty products. Today producers rely on closed stainless-steel reactors that control ozone concentration, flow rate and temperature so the reaction stops at the ideal peroxide value for cosmetic use.

Because of its conditioning properties and self-preserving nature you will most often see Ozonized Linseed Oil in balms, repair serums, after-sun gels, anti-aging creams, clarifying masks and aerosol sprays that promise a light, breathable finish.

Ozonized Linseed Oil’s Cosmetic Benefits/Uses

In formulas this ingredient plays two key roles

  • Propellant – its built-in oxygenated compounds allow it to act as a gentle propelling agent in aerosol sprays and foams which means fewer added gases and a lighter mist on application
  • Skin Conditioning – the fatty acid base softens and smooths while the ozonides slowly release active oxygen that helps keep the skin’s surface feeling fresh balanced and comfortable

Who Can Use Ozonized Linseed Oil

Ozonized Linseed Oil suits most skin types including normal, dry and combination skin thanks to its mix of fatty acids and gentle oxygenated compounds that soften without leaving a heavy residue. Those with very oily or highly reactive skin might find it a bit rich or tingly, so they may prefer lighter textures or patch to smaller areas first. Because it is plant derived and contains no animal by-products it is suitable for both vegans and vegetarians.

Current research has not flagged any specific risks for pregnant or breastfeeding women when this ingredient is used topically in cosmetic amounts. That said this is not medical advice and anyone who is pregnant or nursing should show the full ingredient list of any new product to their healthcare provider to be on the safe side.

The oil does not make skin more sensitive to sunlight and it can be worn during the day without boosting the need for extra sun protection beyond a normal SPF. It also works well alongside most common actives such as niacinamide, panthenol and gentle fruit acids.

Potential Side Effects/Adverse Reactions

Side effects from topical Ozonized Linseed Oil can vary from person to person. The points below list potential outcomes but most people will not experience them when the ingredient is used correctly in a well-made product.

  • Mild stinging or warmth right after application, especially on freshly exfoliated skin
  • Temporary redness if skin is already irritated or broken
  • Contact dermatitis in individuals with a flaxseed allergy
  • Clogged pores in very oily skin if used in a heavy formula
  • Light bleaching of fabrics if the product transfers before it is fully absorbed

If any irritation or unusual change occurs stop using the product and consult a healthcare professional

Comedogenic Rating

Rating: 3 out of 5. While the oxygen-rich ozonides make the oil feel lighter than raw linseed oil the base is still a blend of long-chain fatty acids that can settle into pores and mix with excess sebum. This medium score means some people will have no problems while others may notice clogged pores on oily zones. For most acne-prone users it is best to stick with lighter oils or non-oil textures.

The level of refinement and the total amount used in a formula also influence how it behaves; small percentages in a gel or spray are less likely to cause issues than a thick balm where the oil sits on the skin for hours.

Summary

Ozonized Linseed Oil conditions skin and serves as a mild propellant. It does this by pairing nourishing omega 3 fatty acids with ozone-derived compounds that give a fresh feel while helping formulas spray or foam without extra gas. Despite these perks it is still a niche ingredient found in a limited number of balms masks and aerosol mists rather than mainstream products.

Safety data show it is generally well tolerated with only rare reports of irritation or allergy. As with any new skin care ingredient a quick patch test on a small area is smart before full use.

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