Science of Beauty Skincare Masterclass - Sonic Cleansing (Singapore Dermatologist - Dr. Teo Wan Lin)

Dr. Teo Wan Lin is a board-certified dermatologist practising in Singapore. At her private dermatology practice, TWL Specialist Skin and Laser Centre, she sees patients with chronic skin diseases, including acne, rosacea, perioral dermatitis and eczema. In this article, she talks about the science behind the LUNA 3 and how it can be incorporated into your daily skincare regimen. There is scientific evidence for sonic cleansing being more effective than traditional manual cleansing methods. Dr. Teo shares her perspective as a dermatologist about the value of sonic cleansing technology in LUNA 3 in skin diseases that are affected by changes in skin bacteria. She also gives some tips on keeping your skin feeling refreshed and healthy during hot summer months or if you live in a humid tropical country like Singapore.

The importance of a proper cleansing routine

Cleansing is the basic step of a good skincare regimen. Ever heard of individuals who say they only cleanse with water? Well, according to dermatologists at least, this is a bad idea. The skin itself hosts an ecosystem of microorganisms, mostly good bacteria that keep the skin’s immune system and barrier healthy and prevents “bad” pathogenic microorganisms from infecting the skin. Many dermatological conditions like acne, maskne, rosacea, perioral dermatitis and eczema affecting facial skin are linked to imbalances in the skin bacterial load. This is a phenomenon known as microbiome dysbiosis.

While it may be true that some individuals are genetically blessed with healthy skin and are not acne-prone, most if not all of us will benefit from having an efficient skin cleansing regimen. The purpose of skin cleansing is to remove dirt, excess sebum, sweat and environmental pollutants to maintain healthy skin microflora. In countries with tropical weather such as in Singapore, the humidity increases growth of microorganisms on skin. This is made worse with occlusion, such as when wearing a face mask. Maskne is only one dermatological condition that can be directly caused by the wearing of a face mask. Many individuals with pre-existing rosacea, facial eczema and acne[1] have also found that their skin condition flared up after wearing a face mask. Why is this so?

Not all of these dermatological conditions are directly caused by bacteria, but the presence of bacteria can affect the severity of the disease.

Cleansing itself is part of treatment recommendations in various dermatological problems which are directly impacted by microbial load, such as acne and more recently maskne. In acne-prone individuals, there is a predominance of a type of acne bacteria known as Cutibacterium acnes (C. Acnes) - previously known as Propionibacterium acnes. This can induce further inflammation in skin. Maskne in particular is due to an overgrowth of microorganisms in an occlusive environment[2], worsened by textile-skin friction.

Add sonic cleansing to your double cleansing regimen

I have always advocated double cleansing. Makeup has to be first dissolved, with an oil soluble cleanser. The second cleanse aims to remove residue, including grime dirt and bacteria which is emulsified in a foam which is rinsed off, for an efficient cleansing process.

Sonic cleansing devices have been proven in various studies and literature to be an effective and gentle method to improve inflammatory conditions affected by bacteria, including acne[3]. The LUNA 3 by FOREO utilises sonic technology to optimise the double cleansing process, when used together with a gentle cleanser that respects the skin barrier. It features patented T-Sonic technology with 8,000 pulsations per minute. This effectively removes excess sebum, debris and micro particulate matter which can breed pathogenic bacterial growth.

References:

[1]. Teo WL. Diagnostic and management considerations for "maskne" in the era of COVID-19. J Am Acad Dermatol. 2021;84(2):520-521.

[2]. Teo WL. The "Maskne" microbiome - pathophysiology and therapeutics. Int J Dermatol. 2021 Feb 12:10.1111/ijd.15425.

[3]. Gold M, Ablon G, Andriessen A, Goldberg D, Hooper D, Mandy S. Facial cleansing with a sonic brush-A review of the literature and current recommendations. J Cosmet Dermatol. 2019 Jun;18(3):686-691.

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