Non-comedogenic ingredients: Essentials & formulation strategies

In skincare, the non-comedogenic ingredients are those that are unlikely to clog the pores of the epidermis.⁶ It has become a go-to solution, offering lightweight, non-greasy variants.
 

In 1972, scientists discovered for the first time that cosmetics could lead to acne. They examined the persistent comedones in adult women who frequently used face cosmetics.⁶ Kligman and Otto named the condition 'Acne Cosmetica'.⁷

Comedogenic substances are those that result in comedones, or clogged pores. The same thing is meant by the occasionally used term, acnegenic, meaning promoting acne. These comedogenic substances contain ingredients that can aggravate oily or acne-prone skin. Such ingredients include fragrances, synthetic colors, preservatives, and oils.

Acne is a common skin condition caused by clogged (blocked) hair follicles beneath the epidermis. When dead cells and sebum (oil that prevents the skin from drying out) clog pores, they produce lesions (damaged skin), commonly called pimples. The medical name for expanded or clogged hair follicles under the epidermis is comedone^5,6. Although acne can affect people of any race and age, teens and young adults are the most likely to experience it.⁵

Comedones are of two main types:
 

• Blackheads: Dirt is not the reason why blackheads appear dark. Rather, this type of blackhead is "open," and the pigment melanin reacts with ambient oxygen to give it its dark appearance.
• Whiteheads: They have a yellowish or white head and are closed.⁸

Counteracting pore-clogging with the right formulations

The fine hair-containing hair follicle (pore) is connected to sebaceous (oil) glands. The healthy sebaceous glands produce sebum, which exits the follicle and settles on the skin's surface. The follicle is lined with skin cells called keratinocytes. These typically rise to the surface of the epidermis as the body sheds cells. Keratinocytes, sebum, and hair adhere to one another inside the pores when a person develops acne, thus clogging the pores.⁵

Acne may develop due to the constant use of numerous cosmetic and personal care products that contain comedogenic ingredients, as well as other factors like:
 

• hormones,
• pregnancy,
• certain medicines, etc.^{4, 5}
   

This inhibits the sebum from getting to the skin's surface and stops the keratinocytes from shedding. The oil and cell mixture causes inflammation, which includes swelling, redness, heat, and pain. Thus, it allows bacteria that typically reside on the epidermis (Propionibacterium acnes) to multiply in the clogged follicles. As the follicle wall disintegrates, bacteria, keratinocytes, and sebum are released into the surrounding skin, resulting in pimples.

Pore-clogging and formation of whiteheads and blackheads

Elevated oil production in the pore is believed to be one cause of the development of acne⁵. Clogged pores can result from the high sebum production linked to oily skin. People with oily skin tend to have larger pores because their sebaceous glands are reactive and produce more oil, which can cause the pores to swell and become more noticeable. Blackheads and acne are caused by clogged pores that are infected with bacteria.

Numerous traditional skincare products may accidentally cause an increase in oil production. Ingredients that help dry skin, like mineral oil, silicones, and coconut oil, will retain sebum on oily skin types. In response to what the skin interprets as dehydration or an imbalance in natural oil levels, the skin becomes unable to breathe and will begin to produce more oil.³

Since non-comedogenic products do not clog the pores and help to balance oil production, they cater to oily and acne-prone skin.³ They have a non-heavy texture and often contain compounds that do not aggravate pore obstructions¹⁰. However, they may not treat the existing acne.¹¹

As non-comedogenic formulations are light, the skin may absorb them with ease. They maintain a porous environment by simulating the skin's natural sebum production. Products that are non-comedogenic guarantee that the pores stay open and can breathe. They thus help sebum to naturally migrate to the surface of the skin and prevent the buildup, causing acne.³ That is how non-comedogenic skincare prevents acne and matters a lot!

Also, the non-comedogenic products lower the chances of pore blockage, skin irritations, and subsequent acne breakouts. Thus, they are ideal for sensitive skin.⁹

 

Benefits of non-comedogenic products

Non-comedogenic products provide adequate moisture without clogging pores. The outcome is a strong dermis that is resistant to dullness, shine, and breakouts. They help have healthy skin due to the following³:
 

• They maintain natural oils while balancing sebum production. They are devoid of heavy oils. Excess sebum produced by oily skin can make it look glossy and greasy, particularly in the T-zone (forehead, chin, and nose). Oily skin may also be more prone to acne since too much oil might block the pores¹². Here, non-comedogenic products can help by preventing acne and controlling the production of oil^{3, 12}. Areas of combination skin, typically around the T-zone, are oily, while other areas are dry. Here also, non-comedogenic products can help as they control oil production.^{3, 12}
• Since non-comedogenic formulas are light, the dermal layer can absorb them with ease.
• They make sure the pores are not blocked and allow them to breathe. The epidermal pores' ability to remove harmful substances, sweat, and sebum without interruption is called "breathing". The capability of the dermal layer to breathe is essential for preserving its health and avoiding acne.³ So, non-comedogenic products prevent clogged pores and help maintain skin health.
• They help avoid acne and get clear skin. A common dermal issue is sensitive skin, which affects at least 60% of women and 50% of men to some extent. Sensitive skin can affect every type of skin, including combination, dry, normal, and oily. Regardless of the type, extra-gentle care is necessary for sensitive skin.¹² Non-comedogenic products can help sensitive skin as they do not irritate and help to prevent acne.⁹

To better understand how these formulations support clear skin, let us explore some of the most commonly used non-comedogenic ingredients and their specific benefits.