While ceramides and lipid-based moisturisers are fundamental for restoring the permeability barrier, they are often insufficient to 'cure' chronic flaking when used in isolation. Chronic flaking is frequently a symptom of dysregulated desquamation—the natural shedding process of the skin—rather than a simple lack of surface oil. In healthy skin, a precise ratio of ceramides, cholesterol, and free fatty acids forms the lamellar bilayers that prevent transepidermal water loss (TEWL) [1]. However, if the underlying cause of flaking is an inflammatory condition like seborrhoeic dermatitis or psoriasis, or a deficit in enzymatic activity, merely applying lipids will not address the root physiological dysfunction [2].
For chronic flakers, the issue often lies with the corneodesmosomes—protein bridges that hold skin cells together. These require specific pH-dependent proteases to break them down for smooth shedding. If the skin's microenvironment is too dry or the pH is disrupted, these enzymes fail, leading to the accumulation of visible clumps of cells known as scales or flakes [3]. Therefore, while lipid replenishment is essential to minimise further moisture loss, a comprehensive treatment must also address cellular turnover and the acidic environment necessary for enzymatic function to truly resolve the flaking cycle [4].
The stratum corneum operates as a biosensor, reacting to environmental stressors like the low humidity common in many Australian regions. When the barrier is compromised, a signalling cascade triggers the release of cytokines, which can accelerate keratinocyte proliferation while simultaneously impairing the maturation of the cornified envelope [1]. This results in 'pathological' keratinisation, where cells reach the surface in an immature state, still tethered to their neighbours, manifesting as chronic flaking.
Furthermore, the efficacy of lipid moisturisers is highly dependent on the 'physiological ratio.' Research indicates that applying a single lipid, such as ceramide alone, can actually delay barrier recovery by creating a nutritional imbalance in the intercellular matrix [5]. An optimal formulation must mimic the skin's natural 3:1:1 ratio (ceramides, cholesterol, and fatty acids) to effectively integrate into the lamellar structures and support the biochemical processes required for a smooth, non-flaking complexion [2].
For those navigating the complexities of chronic flaking, supporting the skin’s delicate microbial balance is often as vital as lipid replenishment. The Balance Biome Crème was formulated with Bifida Ferment Lysate to encourage this equilibrium, while the inclusion of ceramides and cholesterol in our Surface Calm cleanser ensures the desquamation process isn't further disrupted during the essential cleansing step.
FAQ
Why does my skin still flake even after applying heavy oils?
Oils are primarily occlusive or emollient; they sit on the surface to prevent water loss or smooth the skin texture. However, they lack the specific amphiphilic structure of human skin lipids (ceramides) required to repair the structural lamellar bilayers [1]. Additionally, chronic flaking often involves a lack of humectants like Urea or Lactic Acid, which are necessary to hydrate the enzymes that facilitate shedding [3].
How does pH affect the success of ceramide moisturisers?
The enzymes responsible for synthesising your skin's own ceramides (such as β-glucocerebrosidase) and the enzymes that allow skin to shed (kallikreins) both require an acidic environment, typically around pH 5.5 [4]. If your skincare routine or cleanser is too alkaline, it neutralises this 'acid mantle,' rendering even the most expensive ceramide moisturiser less effective as the skin's natural repair machinery is stalled [5].
Can humectants help resolve flaking better than lipids?
They work synergistically rather than as substitutes. Humectants like Glycerin or Sodium PCA draw water into the corneocytes, which is vital because the enzymes that digest the 'glue' between flakes are water-dependent [3]. Without sufficient hydration from humectants, lipids alone will just grease down the flakes without actually helping them detach from the skin surface [2].
References:
[1] Peter M. Elias, et al. Journal of Investigative Dermatology. 2014;134(3):595-598. doi:10.1038/jid.2013.353
[2] Mao-Qiang M, et al. Archives of Dermatology. 1993;129(6):728-738. doi:10.1001/archderm.1993.01680270066008
[3] Rawlings AV, et al. Journal of Investigative Dermatology. 1995;104(5):737-741. doi:10.1111/1523-1747.ep12606979
[4] Schmid-Wendtner MH, et al. Skin Pharmacology and Physiology. 2006;19(6):296-302. doi:10.1159/000094670
[5] Man MQ, et al. Journal of Investigative Dermatology. 1996;106(5):1096-1101. doi:10.1111/1523-1747.ep12339870
