Retinol has many uses that can benefit skin health, due to its ability to penetrate the stratum corneum and the dermis of the skin.
To help treat acne
With acne — a common chronic skin condition — dead skin cells and oils from glands block the hair follicles of the skin.
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Bacteria can also invade these blocked pores. This can result in inflammation and can cause:
Topical retinoids such as retinol can reduce the abnormal skin peeling that blocks pores and unclog them, according to a 2017 article. Retinol can also reduce inflammation by blocking molecules that can cause inflammation.
A 2019 systematic review suggests that topical retinoids effectively and safely treat acne. It also suggests that the dose of a topical retinoid a person uses is more important than the type of topical retinoid they choose.
Additionally, the review notes that retinoid treatment in combination with an antimicrobial agent may improve the efficacy of acne treatment.
A person with severe acne may require stronger retinoids than retinol (a weaker retinoid), such as isotretinoin. These retinoids generally require a prescription from a dermatologist.
Learn more about how retinol can help treat acne here.
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Skin aging can occur due to biological age as well as external factors, such as:
- ultraviolet (UV) light exposure
This can result in a loss of elasticity in the skin as well as the epidermis layer of the skin holding less water. Visible signs of skin aging include:
- fine lines
Skin aged by sun damage may also show darker spots on the skin, known as age spots, according to the AAD.
Retinol can protect against the breakdown of collagen, and it stimulates cell turnover and collagen production in the skin, per the 2019 research review mentioned earlier.
Additionally, retinol can strengthen the epidermis and reduce the amount of water that passively evaporates from the skin.
This can result in the skin looking plumper and can reduce and slow the signs of skin aging.
In a small 2017 study, topical application of retinol at a strength of 0.4% on participants resulted in increased epidermal thickness and improved blood flow to the treated area of skin.
Researchers also note an increase in collagen and elastin expression. This suggests that retinol improves the microenvironment of the dermis.
A 2019 study found that retinol improved the appearance of wrinkles around the eyes and on the neck after 8 weeks of use by participants.
Additionally, a small 2016 study compared the effects of retinol and retinoic acid. The study found that retinol has smaller effects but remains effective in increasing epidermal thickness and collagen expression.
Facial imaging analysis also demonstrated a significant decrease in facial wrinkles after participants had used retinol for more than 12 weeks.
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To improve the appearance of skin
Retinol can improve the appearance of uneven skin tone and skin texture, due to its effect on cell turnover and collagen production. It can also brighten the skin.
A small 2020 study notes that hyperpigmentation and unevenness decreased in participants who used retinol serums at concentrations of 0.3% and 0.5% for 8 weeks. However, researchers also note that participants who used the 0.5% serum experienced more frequent symptoms.
A 2019 study investigated the effects of a 3% strength retinol peel in participants, including people of color. The study noted that the peel significantly improved pigmentation and complexion. The researchers suggest that this treatment option is safe and effective in people of all skin types.
However, the AAD notes that people of color, particularly people with dark skin, should be careful when using retinol. It may cause irritation, which can trigger hyperpigmentation.
The AAD recommends that a person using retinol start slowly and monitor its effects.
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Other benefits to using retinol include:
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- Treatment of keratosis pilaris: Retinol can treat keratosis pilaris, a condition that causes the skin to be rough and bumpy, according to the American Osteopathic College of Dermatology (AOCD).
- Protection of the skin: Research shows that retinol also strengthens and thickens the epidermis, which may protect the skin against external stressors such as pollution.
- Minimizing scars and pores: Retinol can also improve the appearance of acne scars, per the AAD. It can also minimize the appearance of pores, 2019 research suggests.