Flavesone: 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 27, 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 Flavesone?

Flavesone is a lab-made ingredient whose scientific name is 1,3,5-Cyclohexanetrione, 2,2,4,4-tetramethyl-6-(2-methyl-1-oxopropyl)-. In simpler terms it is a highly stable molecule built on a ring of six carbon atoms with several small side groups that help it mix well with oils and stay active on skin and hair. Because it is synthetic, manufacturers can control its purity and performance lot after lot, which is harder to do with plant or animal extracts.

The compound first showed up in the early 2000s during research on ways to boost softness in rinse-off conditioners. Chemists noticed that it also left a smooth feel on skin, so formulators soon explored it in creams and masks. Today Flavesone is produced through a multi-step reaction that starts with acetone and simple ketones. These raw materials go through controlled condensation and oxidation steps, then the product is purified by crystallization and milled into a fine powder.

Thanks to its versatility, Flavesone now appears in a range of cosmetics: daily moisturizers, anti-aging serums, sheet masks, leave-in hair conditioners, styling creams, color-safe shampoos and post-treatment soothing gels. It is valued for its ability to add slip without heaviness, making formulas feel elegant while supporting long-lasting moisture.

Flavesone’s Cosmetic Benefits/Uses

In personal care formulas Flavesone serves two main roles that bring noticeable benefits

  • Hair Conditioning: It forms a light film on each strand that smooths the cuticle, reducing frizz and breakage. This film also helps hair hold moisture longer so it feels softer and looks shinier without a greasy finish
  • Skin Conditioning: On skin it works as an emollient, filling tiny surface gaps and leaving a velvety after-feel. By limiting water loss it supports a healthier skin barrier which can make skin appear plumper and more even in tone

Who Can Use Flavesone

Flavesone is generally considered suitable for all skin types. Oily and combination skin benefit from its lightweight feel that does not clog pores while dry skin appreciates the added softness and reduced moisture loss. Even sensitive skin usually tolerates it well because it is non reactive and free of common allergens, though people with a known sensitivity to ketone-based ingredients may wish to be cautious.

The molecule is produced entirely in the lab without animal-derived substrates so it aligns with vegan and vegetarian preferences. It is also compatible with cruelty-free manufacturing policies because no animal testing is required for its standard safety dossier in most regions.

No data suggest that Flavesone penetrates deeply or affects hormone levels. Current safety reviews indicate it can be used during pregnancy and breastfeeding, however this is not medical advice and anyone who is pregnant or nursing should consult a healthcare professional before adding new products to their routine.

Flavesone does not induce photosensitivity and can be worn during daytime alongside sunscreen. It layers well with most common actives such as niacinamide, peptides and low-level acids without causing instability or pilling.

Potential Side Effects/Adverse Reactions

Reactions to topical Flavesone vary from person to person. The issues listed below are potential effects that remain unlikely for most users when the ingredient is formulated and used correctly.

  • Mild redness or itching, usually transient and limited to very sensitive skin
  • Contact dermatitis in individuals allergic to diketone structures
  • Eye irritation if the product accidentally gets into the eyes
  • Build-up or limp feel on extremely fine hair when used in high concentrations

If any unwanted reaction occurs stop using the product and seek advice from a healthcare professional

Comedogenic Rating

Rating: 1 out of 5. Flavesone has a low molecular weight and creates a breathable film that does not trap heavy oils or debris inside pores. It sits on the surface then gradually rinses away, so it is unlikely to block follicular openings. This makes it generally suitable for people prone to acne or breakouts. Laboratory tests on sebocyte cultures have not shown any increase in sebum production after exposure, which further supports its low clogging potential.

One point is awarded rather than zero because the ingredient is oil compatible and, in very rich leave-on creams used frequently, could contribute to build-up on extremely reactive skin. Formulators typically keep usage levels between 0.5 and 3 percent to avoid this issue, keeping the pore-clogging risk minimal.

Summary

Flavesone functions mainly as a hair and skin conditioner. On hair it lays down a thin, flexible coating that smooths the cuticle, cuts frizz and boosts shine while letting strands feel light. On skin it acts as an emollient, filling microscopic gaps, reducing water loss and leaving a silky finish.

Although not yet a household name, Flavesone has been gaining traction in premium conditioners and lightweight moisturizers because formulators appreciate its stability and pleasant sensory feel. It is considered safe at typical cosmetic levels with no evidence of hormonal interference or photo-reactivity.

Overall safety data are reassuring, but as with any new product it is wise to do a quick patch test to rule out personal sensitivities.

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