Skin aging is a multifactorial process. Genetics may account for up to 60% of the variability in these features, but how these traits manifest in an individual depends on the exposome—the cumulative impact of external factors such as UV exposure, environmental pollution, diet, and lifestyle. As a result, patients with similar concerns may show very different patterns: some develop dryness and irritation more rapidly, others persistent pigmentation, and others earlier loss of firmness and wrinkles [1, 2].

In practical terms, a DNA skin profile refers to DNA profiling—the analysis of individual genetic variations, primarily single-nucleotide polymorphisms (SNPs). An SNP is a variation in a single nucleotide (A, T, G, or C) at a specific position in the genome. These variations do not predict outcomes with absolute certainty, but help identify stable biological tendencies of the skin: barrier function, inflammatory response, UV sensitivity, extracellular matrix remodeling, and antioxidant capacity.

It is important to note that the genetic profile is inherent and static. It does not reflect the current condition of the skin and cannot serve as a standalone diagnostic tool. However, it can be a useful additional reference when selecting skincare or preparing for procedures, helping to identify vulnerable areas in advance and avoid overloading the skin with poorly tolerated actives. The clinical relevance lies not in individual SNPs but in their combinations and their alignment with clinical presentation. Superficial interpretation increases the risk of overdiagnosis and overly complex regimens, which may reduce adherence.

Four main directions are most commonly associated with genetic markers and help define practical focus areas in dermatology and aesthetic practice.

Barrier and hydration: dryness, sensitivity, tolerance to actives

The integrity of the stratum corneum and hydration levels depend on the expression of structural proteins and water transport mechanisms. The filaggrin gene (FLG) plays a key role. FLG polymorphisms, especially loss-of-function variants, are associated with reduced natural moisturizing factor (NMF), disrupted lipid organization in the stratum corneum, and increased transepidermal water loss. Clinically, this presents as dry skin, increased sensitivity, and lower tolerance to aggressive procedures. In such cases, even effective ingredients such as retinoids or hydroxy acids may more often trigger adverse reactions. Therefore, when barrier vulnerability is present, care typically begins with barrier repair before gradually expanding the regimen [3].

Aquaporin-3 (AQP3), responsible for water and glycerol transport in the epidermis, is also relevant. Reduced activity is associated with impaired hydration and slower barrier recovery. In such cases, combinations of lipids, NMF components, and ingredients that indirectly support aquaporin function may be appropriate [4].

Practical approaches in this area include lipids (ceramides, cholesterol, fatty acids, squalane), NMF components (urea, lactic acid, amino acids, sodium PCA), soothing ingredients (such as niacinamide and panthenol), and mild nonionic surfactants.

Pigmentation and photosensitivity: risk of lentigines, melasma, and post-inflammatory hyperpigmentation

Individual UV sensitivity and the risk of pigmentary disorders are associated with variations in the melanocortin 1 receptor gene (MC1R). Certain MC1R polymorphisms are linked to reduced eumelanin production and increased photosensitivity. Clinically relevant variants occur not only in fair phototypes but also in darker skin, presenting as a tendency toward persistent lentigines and melasma.

Melanogenesis also involves the tyrosinase gene (TYR) and transporters from the SLC family, including SLC45A2 and SLC24A5. These proteins regulate ionic balance and pH within melanosomes, supporting tyrosinase activity. Polymorphisms in these genes may lead to melanocyte instability and an exaggerated response to external triggers. In such cases, tyrosinase inhibition alone may be insufficient, requiring a broader approach that includes antioxidant support and strict photoprotection—particularly before invasive or traumatic procedures to reduce the risk of post-inflammatory hyperpigmentation.

Preventive and corrective strategies include broad-spectrum UV filters, antioxidants, melanin synthesis inhibitors (azelaic acid, kojic acid, tranexamic acid, arbutin), and vitamin C and retinoids.

Collagen and matrix: early loss of firmness and wrinkles

The balance between synthesis and degradation of structural proteins determines age-related dermal changes. Polymorphisms in the collagen type I gene (COL1A1) may lead to reduced synthesis or altered fiber structure, clinically presenting as earlier loss of firmness and wrinkle formation.

Matrix metalloproteinases, particularly MMP1 and MMP3, also play a key role. Genetically driven overexpression of these enzymes is associated with accelerated degradation of collagen and elastin, especially under UV exposure. Therefore, for individuals with such predispositions, photoprotection and agents that support matrix synthesis and reduce MMP activity are particularly important.

Commonly used approaches include retinoids, matrikine peptides, vitamin C, and ingredients associated with reduced MMP activity (such as green tea extract, polyphenols, and niacinamide). Adequate hydration, including the use of hyaluronic acid, also remains important.

Antioxidant defense and microinflammation: dullness, uneven tone, reactivity

The skin’s antioxidant defense includes both enzymatic and non-enzymatic systems. Polymorphisms in genes such as SOD2 and GPX1 may reduce cells' ability to neutralize free radicals, contributing to oxidative damage and accelerated aging. Clinically, this may present as a dull complexion, uneven tone, rough texture, and increased sensitivity to external factors. In such cases, regular use of combined antioxidant systems is justified.

Genetic variations in IL6 and TNF are associated with a tendency toward chronic low-grade inflammation (inflammaging). This condition is linked to increased extracellular matrix degradation and impaired regenerative capacity. In such contexts, skincare should emphasize anti-inflammatory and soothing components, along with measures to reduce overall skin reactivity.

Key ingredients include antioxidants (vitamins C and E, ferulic acid, coenzyme Q10, resveratrol, and grape seed extract), as well as anti-inflammatory and soothing agents such as azelaic acid, tranexamic acid, bisabolol, Centella asiatica extract, panthenol, allantoin, and niacinamide. Copper peptides and growth factors may also be used to support regenerative processes.

In practice, genetic traits rarely occur in isolation. More often, a combination of predispositions is present, requiring prioritization in skincare and procedure planning: the most vulnerable pathway is addressed first, followed by additional targets. This approach helps reduce the risk of adverse reactions and improves tolerance to long-term regimens.

References

1. Geusens B., Haykal D. Genetic profiling and precision skin care: a review. Front Genet 2025; 16: 1559510.
2. Farage M.A., Miller K.W., Elsner P., Maibach H.I. Intrinsic and extrinsic factors in skin aging: a review. Int J Cosmet Sci 2008; 30(2): 87–95.
3. Osawa R., Akiyama M., Shimizu H. Filaggrin gene defects and the risk of developing allergic disorders. Allergol Int 2011; 60(1): 1–9.
4. Bollag W.B., Aitkens L., White J., Hyndman K.A. Aquaporin-3 in the epidermis: more than skin deep. Am J Physiol Cell Physiol 2020; 318(6): C1144–C1153.