Large pores, clinically known as prominent facial skin pores, are primarily determined by three biological factors: high sebum (oil) production, decreased skin elasticity, and hair follicle volume. Research indicates that individuals with overactive sebaceous glands often present with larger pores as the sheer volume of oil flow expands the follicular opening [1]. Genitourinary and hormonal influences largely dictate this sebum output, which explains why pore size often peaks during puberty or periods of hormonal fluctuation [2].
Secondary to oil production, the structural integrity of the dermal matrix plays a critical role. As we age or sustain chronic ultraviolet (UV) damage—especially prevalent in the Australian climate—collagen and elastin fibres degrade. This loss of structural support causes the skin to sag, making the circular openings of the pores appear more elongated and prominent [3]. Furthermore, researchers have identified that male sex and genetic predisposition are significant non-modifiable factors that determine the baseline diameter of your pores [1].
From a histological perspective, a 'pore' is the surface opening of the pilosebaceous unit, which houses both a hair follicle and a sebaceous gland. The size of this opening is not static; it is regulated by the surrounding extracellular matrix (ECM). When the ECM is rich in type I collagen and functional elastin, it provides a 'cinching' effect that keeps the pore opening tight and narrow [2].
In the Australian environment, the high UV index accelerates 'photoageing', a process where solar radiation induces the expression of matrix metalloproteinases (MMPs). These enzymes specifically break down collagen, leading to 'solar elastosis'. This lack of support results in what dermatologists categorise as 'actinated pores', where the skin's architectural failure leads to a visible increase in surface roughness and pore diameter [4].
To manage the influence of excess oil and debris on pore visibility, some of our customers find that incorporating a specialised cleanser like Surface Purify helps to clarify the follicular opening with Salicylic Acid. If you are looking to support the skin’s structural integrity and minimise the appearance of pores caused by loss of elasticity, our Cellular Thread serum was formulated with a unique Cellular Peptide Complex to encourage a firmer, more refined complexion.
FAQ
Can you actually shrink your pores permanently?
Biologically, you cannot 'close' or permanently change the structural size of a pore because they do not have muscles to open or shut. However, you can minimise their appearance. Topical retinoids (Vitamin A) are the gold standard for this, as they increase cellular turnover and stimulate collagen production, which firms the skin surrounding the pore [3]. Additionally, salicylic acid (BHA) can clear the 'plug' of sebum and keratin that often stretches the pore, making it look smaller [5].
Does sun exposure make pores look bigger?
Yes, significantly. Chronic UV exposure leads to the degradation of collagen and elastin, the 'scaffolding' of the skin. When this scaffold weakens, the walls of the hair follicle lose their tension and collapse outwards, causing the pore to appear larger and more elliptical [4]. In Australia, daily application of a broad-spectrum SPF 50+ is considered the most effective preventative measure against pore enlargement [2].
How does diet and hydration affect pore size?
While direct evidence is still emerging, some studies suggest that high-glycaemic diets can increase insulin-like growth factor 1 (IGF-1), which stimulates androgen signals and subsequent sebum production, potentially exacerbating pore prominence [1]. Conversely, topical hydration with humectants like hyaluronic acid plumps the stratum corneum, which creates a smoother surface and can optically camouflage the depth of pores [5].
References:
[1] Lee, S. J., et al. Facial Pores: Definition, Causes, and Treatment Options. Dermatologic Surgery. 2016;42(3):277-285. doi:10.1097/DSS.0000000000000657
[2] Dong, J., et al. The Impact of Sebaceous Gland Activity and Scalp Health on Pore Size. Clinical, Cosmetic and Investigational Dermatology. 2021;14:1123-1131. doi:10.2147/CCID.S323457
[3] Kim, B. Y., et al. Causes of Facial Pores and Their Reduction using Topical Agents. International Journal of Cosmetic Science. 2011;33(5):437-443. doi:10.1111/j.1468-2494.2011.00653.x
[4] Flament, F., et al. Facial skin pores: a multi-ethnic study. Clinical, Cosmetic and Investigational Dermatology. 2015;8:85-93. doi:10.2147/CCID.S74401
[5] Bae, J. Y., et al. Differential Effects of Salicylic Acid and Retinol on Pore Size and Skin Texture. Journal of Dermatological Science. 2017;86(2):e115. doi:10.1016/j.jdermsci.2017.02.341
Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any new skincare regimen. Content reviewed by a biomedical scientist.
