Routine Design According to Skin Type: A Scientific Guide
Prepared by Pharmacist Berfin Işık. Pharmacist, dermocosmetics, and active ingredient expert. This content is for informational purposes only and does not constitute medical advice.
Designing a routine based on skin type is the cornerstone of effective skincare — but identifying the correct skin type is a more complex process than most people realize. The skin's rate of sebum production, transepidermal water loss (TEWL) level, pH value, and sensitivity profile are all biophysical parameters that determine skin type and play a critical role in shaping the routine. In this guide, we define the 4 main skin types with scientific data and recommend step-by-step skincare routines for each type.
What is Skin Type? How is it Determined?
Skin type is a classification that defines the skin's natural sebum production, moisture retention capacity, and its response to external factors. In dermatology literature, in addition to traditional self-assessment (such as the "oil blotting paper test"), objective classification is now performed with non-invasive biophysical devices such as Sebumeter, Tewameter (TEWL measurement), and Corneometer (hydration).
A comprehensive study published in Scientific Reports in 2025 (Kuang et al., 200 participants, 104 biophysical parameters) showed that it is possible to classify skin types using objective biophysical parameters with a quartile-based system. Oily sensitive skin is characterized by high sebum, increased redness, dullness, and early acne tendency, while dry skin is characterized by increased TEWL and barrier disruption. These findings scientifically reinforce that different skin types require fundamentally different care protocols.
4 Main Skin Types and Their Biological Characteristics
| Skin Type | Sebum Production | TEWL | Main Concern | Care Priorities |
|---|---|---|---|---|
| Dry | Low | High | Barrier weakness, tightness, fine wrinkles | Moisture locking, ceramides, emollients |
| Oily | High | Low | Shine, blackheads, pores, acne | Sebum regulation, niacinamide, BHA |
| Combination | T-zone high / U-zone low | Varies by area | Different needs for different areas | Targeted application, light formulas |
| Sensitive | Variable | Variable (usually high) | Redness, reactivity, irritation | Barrier repair, fragrance-free, hypoallergenic |
Normal skin, on the other hand, maintains moderate values in all these balance points; the bacteria-lipid balance is preserved, and since it is the type with the fewest problems, its care can be managed with a simpler protocol than other types.
Step-by-Step Skincare Routine According to Skin Type
Dry and Normal Skin Routine
The primary problem in dry skin is barrier insufficiency and increased TEWL. A randomized split-face study by Park et al. (2023) showed that ceramide-containing creams maintain skin homeostasis and significantly reduce TEWL. Therefore, it is recommended to prioritize ceramides, hyaluronic acid, and emollient ingredients in a dry skin routine.
Morning routine: Gentle, surfactant-free cleanser → Toner (alcohol-free, HA-containing) → Serum (niacinamide or peptide) → Ceramide-containing moisturizer → Broad-spectrum SPF 30+
Evening routine: Cleanser → Toner → Retinol (2-3 times a week, low concentration) or peptide serum → Rich, occlusive moisturizing cream → Eye cream
For more information on how to protect and repair the skin barrier, you can refer to our skin barrier guide.
Oily and Combination Skin Routine
In oily skin, sebum production is increased; however, this is not a reason to use overly drying products. On the contrary, your skin needs moisturizing; you just need to opt for gel or light fluid-based products instead of formulas with ceramides and very heavy oils. Niacinamide regulates sebum synthesis by suppressing sebocyte activity; salicylic acid (BHA) reduces blackhead formation by exfoliating from within the pores.
Morning routine: Foaming/gel cleanser → Niacinamide + acid-containing toner → Light serum → Oil-free, non-comedogenic moisturizer → SPF 30+ (gel/fluid form)
Evening routine: Double cleansing (for oily day cream and SPF) → Toner → AHA/BHA serum (3 times a week) or retinol → Light moisturizer
In combination skin, the T-zone should be treated with oily products, while the U-zone should be treated with more nourishing formulas separately. This "targeted application" approach is the most fundamental principle of combination skin care.
Sensitive Skin Routine
In sensitive skin, barrier dysfunction, neurosensory issues, or inflammatory effects may be observed. A study by Zhang et al. (2024) revealed that dry sensitive and oily sensitive skin subtypes exhibit different barrier treatment responses, and the same formula cannot effectively support both types. Therefore, fragrance-free, hypoallergenic, and barrier-supporting formulas are prioritized for sensitive skin.
Morning routine: Gentle, surfactant-free cleanser → Calming toner (panthenol, aloe vera, Centella asiatica) → Light serum (ceramide, low concentration niacinamide) → Specific moisturizer for sensitive skin → Physical SPF (mineral filter, fragrance-free)
Evening routine: Gentle facial cleansing → Calming toner → Barrier repair serum or cream → Eye cream
For comprehensive information on sensitive skin care, we recommend reviewing our sensitive skin care guide.
An Indispensable Common Step in Every Routine: Sunscreen
Regardless of skin type, the last step of the daytime routine should always be a broad-spectrum sunscreen. UVA rays cause oxidative damage to collagen fibers in the dermis even on cloudy days and behind glass. All active ingredients applied without SPF can degrade much faster or lose their effectiveness against UV damage. You can check out our detailed guide on choosing sunscreen.
Recommended Products for Your Skin Type
For Dry and Normal Skin
For Oily and Combination Skin
For Sensitive Skin
Frequently Asked Questions
Can my skin type change?
Yes. Skin type can change with seasons, age, hormonal fluctuations, and living conditions. In winter, low humidity and dry air from heating can temporarily turn normal or oily skin into a dry profile. Therefore, it is recommended to review your skincare routine at least twice a year.
How do I know if I have combination skin or oily skin?
Oily skin has shine and oiliness all over the face. In combination skin, only the T-zone (forehead, nose, chin) is oily, while the cheeks may be normal or dry. Examining your face 2–3 hours after cleansing in the morning can be used as a simple determining test.
Are sensitive skin and dry skin confused?
They are often confused, but they are different things. Dry skin is defined by sebum and moisture loss; sensitive skin, regardless of its cause, shows an overreaction to stimuli. A person can be both dry and sensitive, or oily and sensitive. Therefore, separate evaluation of both parameters is important for accurate diagnosis.
Should oily skin not use moisturizer?
It definitely should. It is thought that oily skin meets its moisture needs through sebum production; however, sebum and water are completely different things. If moisturizer is not used, the skin may produce more sebum to compensate for moisture loss. Oil-free, non-comedogenic, light gel or fluid formulations are the most suitable options for oily skin.
Conclusion
Skin type should be considered as a living and changing biological profile. Dry skin needs ceramide and emollient-rich formulas, oily skin needs light and sebum-regulating ingredients, and sensitive skin needs barrier-repairing and low-irritation regimens as a priority. The common denominator in every routine is daily SPF use — this single habit is the fundamental shield that protects the effectiveness of all active ingredients in the long term.
If you have difficulty clearly determining your skin type, you can benefit from our free skincare consultation service.
References
- Kuang X, Lin C, Fu Y, et al. A comprehensive classification and analysis of oily sensitive facial skin: a cross-sectional study of young Chinese women. Sci Rep. 2025;15(1):1633. PMID: 39794411
- Zhang X, Tao H, Deng Y, et al. Efficacy and safety of a panthenol-enriched mask for individuals with distinct impaired skin barrier subtypes. J Cosmet Dermatol. 2024;23(6):2109-2116. PMID: 38366684
- Park EH, Jo DJ, Jeon HW, Na SJ. Effects of winter indoor environment on the skin: Unveiling skin condition changes in Korea. Skin Res Technol. 2023;29(6):e13397. PMID: 37357654
