EGF has been appearing on ingredient lists with increasing frequency, and with it comes a question worth answering properly: what exactly does it do, and how does it compare to retinol? The two are often positioned as rivals, but the truth is more interesting than that.
What is EGF and how does it work?
EGF stands for epidermal growth factor. It is a protein that occurs naturally in the human body, where it plays a central role in regulating cell growth, repair and division. In the context of skin, EGF acts as a signalling molecule, communicating with epidermal cells to trigger renewal and repair processes.
When applied topically, EGF stimulates fibroblast activity, supporting the skin's production of collagen, elastin, and hyaluronic acid. It also helps repair the extracellular matrix, which is the structural framework that gives skin its firmness and resilience. Research published in Wound Repair and Regeneration has documented EGF's role in regulating the cellular processes underlying skin repair.¹ A study in the Journal of Drugs in Dermatology found cosmetic improvement in ageing skin following topical EGF application.⁴
What matters here is the mechanism. EGF does not resurface or exfoliate the skin. It communicates with cells and supports the skin's own repair processes. This is a meaningful distinction.
EGF vs retinol: what is actually different?
Retinol is a derivative of vitamin A. It works primarily by accelerating cell turnover, increasing the rate at which surface cells are shed. The result, over time, is smoother skin and a reduction in the appearance of fine lines. But the route to that result often involves a period of peeling, redness and sensitivity, particularly for those new to retinol or using higher concentrations. This is not a flaw; it is simply how the ingredient works.
EGF takes a different approach entirely. Rather than forcing the skin to shed and renew, it works within the skin's existing repair language. It regenerates, it does not disrupt. This means EGF is generally well tolerated by sensitive skin types, by those with rosacea, and by anyone who has experienced irritation with retinol.
Neither ingredient is objectively superior. They do different things, they are suited to different skin priorities, and, as discussed below, they can be used together.
Why biomimetic EGF matters
The EGF used in skincare formulations is not extracted directly from human cells. Earlier generations of lab-derived growth factors raised questions about tolerability and safety profile, which is why the development of biomimetic EGF was significant. Biomimetic means the molecule is engineered to mimic the structure and function of the body's own growth factor proteins. It interacts with skin receptors in the same way as endogenous EGF, without the tolerability concerns associated with older formulations.
This distinction matters when you are choosing a product. Not all EGF in skincare is the same, and biomimetic EGF represents the more sophisticated, better-tolerated approach.
Can you use EGF and retinol together?
Yes, and it is worth knowing why this combination makes sense. There is emerging evidence that applying a retinol or retinoid before a growth factor serum may enhance the absorption of the growth factor, as the mild surface disruption caused by retinol allows for better penetration of subsequent actives.
OSKIA Midnight Elixir, a regenerative EGF and multi-peptide night serum, pairs naturally with OSKIA Super R, an HPR retinoid serum. HPR (hydroxypinacolone retinoate) is a next-generation retinoid that converts to retinoic acid without the same degree of irritation associated with traditional retinol. Used together, they address cell renewal and deep cellular repair in a way that neither achieves alone. Apply the retinoid first, allow it to absorb, then follow with the Midnight Elixir.
OSKIA Midnight Elixir: a night serum built around EGF
OSKIA Midnight Elixir is formulated with biomimetic EGF alongside a complex of multi-peptides, shiitake and turkey tail mushroom extracts, melatonin and provitamin D3. Each of these ingredients has a role.
The mushroom extracts are rich in beta-glucans, supporting skin barrier function and providing antioxidant activity. Melatonin is included deliberately: the skin has its own circadian rhythm, with its most intensive repair activity occurring approximately between 11pm and 4am. Melatonin supports and synchronises this nocturnal repair cycle, making it the right ingredient in the right product used at the right time. Provitamin D3 supports skin cell differentiation.
This is not a serum built around a single hero ingredient. The formulation is designed to address multiple dimensions of skin ageing, working with the skin's own repair mechanisms rather than against them.
EGF is significantly more expensive to formulate with than retinol. This is partly why it has not yet reached mass-market penetration. OSKIA has been working with growth factors for years, and the Midnight Elixir reflects that accumulated expertise rather than a trend.
EGF for mature skin: why it becomes more relevant with age
As skin ages, the natural signalling processes that regulate cell renewal become less efficient. The skin's own EGF activity declines, fibroblast function slows, and the scaffolding of the extracellular matrix weakens. Topical EGF is a way to partially restore this cellular communication, providing the signals that ageing skin produces less readily. Research into growth factors and wound healing has consistently demonstrated EGF's capacity to upregulate the repair processes that become subdued with age.²'³
For anyone in their forties, fifties or sixties noticing that the skin is slower to recover, less resilient, and less responsive to the products that used to work, EGF offers a clinically grounded approach to supporting what the skin can no longer generate in the same quantities independently.
Frequently Asked Questions
Is EGF serum suitable for sensitive skin?
Yes. Because EGF works with the skin's own repair mechanisms rather than forcing cell turnover or exfoliation, it is generally well tolerated by sensitive skin. It does not cause the peeling or redness associated with retinol. OSKIA Midnight Elixir has been formulated to be suitable even for those who have found retinoids or acids too disruptive.
Can I use Midnight Elixir every night?
Yes. OSKIA Midnight Elixir is designed for nightly use and is timed to work in alignment with the skin's natural circadian repair window. Consistent use is recommended for results.
How long does it take to see results from an EGF serum?
Most users begin to notice improved skin quality, including texture, firmness and hydration, within four to eight weeks of consistent use. EGF works at a cellular level, which means results build gradually rather than appearing overnight. The Gold et al. study found measurable cosmetic improvement in ageing skin with continued topical EGF use.⁴
Is EGF safe — I've heard it can stimulate abnormal cell growth?
This concern relates primarily to injectable growth factor therapies used in medical contexts, not to topical skincare. Topical EGF does not penetrate deep enough to affect cell growth in the way injectable formulations might. Biomimetic topical EGF, as used in OSKIA Midnight Elixir, has a well-documented tolerability profile and is considered safe for cosmetic use. If you have a history of skin cancer or any active skin condition, consult your dermatologist before introducing any new active ingredient.
Can I use Midnight Elixir alongside my retinol or retinoid?
Yes. OSKIA Midnight Elixir and OSKIA Super R (HPR retinoid) are designed to work together. Apply the retinoid first, allow it to absorb, then apply the Midnight Elixir. There is emerging evidence that the mild surface action of a retinoid may enhance absorption of a subsequent growth factor serum, making the combination more effective than either product used alone.
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Clinical references
- Barrientos S, et al. "Growth factors and cytokines in wound healing." Wound Repair Regen, 2008.
- Nelson BR, et al. "Epidermal growth factor in the treatment of cutaneous wounds." Arch Otolaryngol Head Neck Surg, 1993.
- Werner S, Grose R. "Regulation of wound healing by growth factors and cytokines." Physiol Rev, 2003.
- Gold MH, et al. "Cosmetic improvement of the aging face with topical application of epidermal growth factor." J Drugs Dermatol, 2007.
