EGF serum is made from a lab-produced version of a protein your skin already makes naturally. The epidermal growth factor (EGF) in skincare products is not harvested from human tissue. Instead, it’s created through fermentation, where bacteria or plants are genetically programmed to produce a protein identical to human EGF. The finished serum combines this protein with hydrating and stabilizing ingredients to keep it active on your skin.
The Protein Itself: A Copy of What Your Body Makes
Epidermal growth factor is a small signaling protein that tells skin cells to grow and divide. It was first identified in the 1960s by biochemist Stanley Cohen, who noticed that salivary gland extracts caused newborn mice to develop faster than expected. He isolated the substance responsible and found it could stimulate the growth of epithelial cells in skin and cornea. That discovery earned him a Nobel Prize in 1986 and kicked off decades of research into growth factors.
Your body produces EGF naturally, but production slows with age. The EGF in serums is a recombinant version, meaning scientists start with the human gene that codes for EGF, insert it into a host organism, and let that organism manufacture the protein. The end result is structurally identical to what your own cells produce.
How EGF Is Manufactured
Most commercial EGF is produced through one of two methods: bacterial fermentation or plant-based expression.
The most common approach uses E. coli bacteria. Scientists insert the human EGF gene into the bacteria’s DNA, and the bacteria then produce the protein as they grow and multiply. This is the same basic technique used to manufacture insulin and many other biotech proteins. The European Commission’s cosmetic ingredient database confirms that the standard cosmetic form of EGF (listed as sh-Oligopeptide-1 on ingredient labels) is “a single chain recombinant human peptide, produced by fermentation in E. coli” with a starting gene “synthesized to be identical to the human gene which codes for Epidermal Growth Factor.”
Some brands take a different route. BIOEFFECT, for example, grows its EGF in genetically engineered barley plants. The barley is modified to produce the human EGF protein, which is then extracted from the seeds. Plant-based production systems have some advantages: lower cultivation costs, no risk of animal-borne contamination, and easier scalability. On the ingredient label, this version appears as “Barley (Hordeum Vulgare) Seed Extract” alongside the EGF designation.
Regardless of the production method, the EGF protein is purified and isolated before it goes into any skincare formula. You’re not applying bacteria or barley to your face. You’re applying the purified protein those organisms were used to create.
What Else Is in the Bottle
EGF is present in serums at very low concentrations, typically measured in parts per million. Research formulations have used concentrations ranging from 1 ppm to 50 ppm of actual EGF protein. A finished consumer product might contain 2% to 8% of a proprietary EGF raw material, which translates to roughly 1 to 4 ppm of the growth factor itself. The protein is potent at tiny amounts, so these numbers are not a sign of skimping.
The rest of the formula is designed to hydrate skin and keep the EGF stable. A typical ingredient list is surprisingly short. BIOEFFECT’s serum, for instance, contains glycerin (a plant-based moisturizer), sodium hyaluronate (a form of hyaluronic acid that holds moisture in skin), water, and a few pH-adjusting ingredients like tromethamine and sodium chloride. Some formulations skip preservatives entirely, relying on airless packaging and the simplicity of the formula to maintain shelf life.
Why Stability Matters for EGF Products
EGF is a protein, and like all proteins, it can lose its shape and stop working when exposed to heat, light, or extreme pH levels. The protein is held together by three internal bonds between sulfur-containing amino acids (called disulfide bonds), which give it structural integrity. When those bonds break or rearrange, the protein unfolds and becomes biologically inactive.
Molecular simulations show that EGF begins losing its functional shape at elevated temperatures, passing through a partially collapsed intermediate state before fully unfolding at very high heat. In practical terms, this means EGF serums should be stored at cool to room temperature and kept out of direct sunlight. Many brands use opaque or dark-colored bottles, airless pump packaging, and minimal-ingredient formulas specifically to protect the protein from degradation.
What the Label Tells You
If you’re reading the back of a bottle, the EGF protein will not be listed as “EGF.” Cosmetic regulations require standardized ingredient names. The most common one is sh-Oligopeptide-1, which refers to the recombinant human version produced in bacteria. If the EGF comes from barley, you may see it listed as a barley seed extract with the sh-Oligopeptide-1 designation noted alongside it. Some Korean beauty products list it as rh-Oligopeptide-1, where “rh” stands for recombinant human.
The position of EGF on the ingredient list will typically be near the end, which reflects its low concentration by weight. This is normal and expected given that it works in parts-per-million quantities.
Safety of Topical EGF
Clinical data on topical EGF is generally reassuring. In a large observational study of over 1,100 patients using an EGF-based cream, 99.2% were categorized as “safe” by their treating physicians. Adverse reactions occurred in about 4.7% of users, with mild redness being the most common complaint. Itching, irritation, and minor swelling were reported in smaller numbers. No severe adverse effects were observed, and no patients dropped out of the study because of reactions.
The one lingering question in the scientific literature involves whether applying a growth factor to skin could, in theory, promote the growth of abnormal cells. Some animal studies have suggested exogenously applied EGF does not stimulate tumor growth, while others have shown the opposite. For typical cosmetic use on healthy skin, this remains a theoretical concern rather than a demonstrated risk, but it’s worth being aware of if you have a history of skin cancer or precancerous lesions.