Growth Factor Serum
Post-Procedure Favorite
Verified reviewer
Pros & cons.
- +Layered system of plant growth factors, retinol, Syn-Ake peptide, and ATP
- +Silky silicone-rich texture that glides and layers beautifully
- +Supporting-dose retinol is well-tolerated for daily use
- +Commonly recommended by dermatologists for post-procedure support
- +Airless pump packaging protects light-sensitive actives
- +Pairs well with stronger retinoids in a complete ZO protocol
- −$200 price tag harder to justify on plant growth factors alone
- −Contains added fragrance
- −Contains propylene glycol, which can irritate a minority of users
- −Retinol content means not pregnancy-safe
- −Growth factor marketing outpaces the published evidence base
The full review.
ZO’s Growth Factor Serum marketing focuses on growth factors, but the INCI list shows silicones, retinol, and peptides. Both claims are true, and the gap between them defines this serum. ZO aimed to compete with SkinMedica TNS in the growth factor category without using human-derived growth factors due to biosafety concerns. This led them to use plant and ferment-derived extracts with more limited evidence. Instead, ZO built the formula around a retinol underlayer, making Growth Factor Serum a layered anti-aging treatment with a growth factor story on the label.
The formula starts with cyclopentasiloxane and water, creating the silicone-dominant delivery system that dictates the texture. Dipropylene glycol, propylene glycol, and glycerin provide humectancy. Dimethicone crosspolymers create the blur-and-glide feel typical of ZO serums. By the time the actives reach the skin, a smoothing, primer-like base prepares the surface for comfort. ZO performs better than most competitors in this specific area.
The growth factor components include Buddleja davidii meristem cell culture, Lactobacillus/Panax ginseng ferment filtrate, hydrolyzed vegetable protein, and hydrolyzed sericin. These plant- and ferment-derived ingredients provide oligopeptides, amino acids, and antioxidants. Do they function as growth factors by binding to specific receptors on fibroblasts and keratinocytes to stimulate proliferation? No, not like human fibroblast-derived growth factors. Do they provide bioactive molecules that support skin metabolism and antioxidant benefits? Yes, and in vitro data for Buddleja davidii is legitimate. Marketing outpaces the science in the gap between “growth-factor-like activity” and “growth factors.”
Retinol, dipeptide diaminobutyroyl benzylamide diacetate (Syn-Ake), ATP, and beta-glucan drive the results. Retinol is the workhorse; even at a supporting dose, it has the strongest evidence for collagen stimulation and turnover in this formula. Syn-Ake is a peptide that relaxes expression lines through a documented in vitro mechanism. ATP and beta-glucan support the skin environment to help it tolerate retinol. This combination is where the product spends its budget on proven mechanisms.
The texture wins. The silicone and humectant base gives the serum a silky, blurring glide that most retinol products lack, while the airless pump packaging protects the light-sensitive ingredients. It applies easily, works well under makeup, and the immediate feel justifies the premium price experientially. The fragrance is present—this is the third ZO review noting fragrance as a recurring issue—so users with fragrance sensitivity should be cautious. Propylene glycol may affect a small subset of contact-dermatitis-prone patients, though most tolerate it well.
Value is the main question. At $200 for 1 oz, Growth Factor Serum matches premium growth factor prices (like SkinMedica TNS) and far exceeds basic retinol serums. If you view this as “a retinol product with a premium delivery system, peptides, and antioxidant support,” the price is high but not absurd. If you view it as “a growth factor serum,” you pay a premium for ingredients that lack full evidence. Patients who already use ZO’s retinol-forward night treatments and want a gentler daytime option with retinoid activity get the most value. In that context, it earns its spot. As a standalone “growth factor product,” it is overpriced for what plant growth factors do.
Clinicians frequently use Growth Factor Serum post-microneedling, post-laser, and with RF treatments because the soothing base aligns with the perception that growth factors aid healing. Evidence for this specific use is mechanistic and anecdotal rather than from randomized trials, but it matches clinical practice. If a dermatologist recommends it for post-procedure care, the use case is defensible. For general anti-aging, a retinol and clinical peptide serum combination reaches similar goals for less money.
Ingredient analysis.
Full INCI list
Cyclopentasiloxane, Water (Aqua), Dipropylene Glycol, Propylene Glycol, Glycerin, Dimethicone, Dimethicone/PEG-10/15 Crosspolymer, Dimethicone Crosspolymer, PEG-12 Dimethicone Crosspolymer, Butylene Glycol, Phenoxyethanol, Panthenyl Triacetate, Acetyl Tyrosine, Phospholipids, Ethyl Linoleate, Sodium Phosphate, Dimethicone/Vinyl Dimethicone Crosspolymer, Fragrance (Parfum), Hydrolyzed Sericin, Magnesium Sulfate, Proline, Oleyl Alcohol, Polysorbate 20, Retinol, Buddleja Davidii Meristem Cell Culture, Menthyl Ethylamido Oxalate, Angelica Polymorpha Sinensis Root Extract, Hydrolyzed Vegetable Protein, Adenosine Triphosphate, Dimethiconol, 1,2-Hexanediol, Pentylene Glycol, PEG-35 Castor Oil, PEG-12 Glyceryl Laurate, Lactobacillus/Panax Ginseng Root Extract Ferment Filtrate, Tocopherol, Sodium Citrate, Disodium Acetyl Glucosamine Phosphate, Caprylyl Glycol, Beta-Glucan, Dipeptide Diaminobutyroyl Benzylamide Diacetate, BHT, Sodium Chloride, Potassium Sorbate.
Skin match.
The science.
The Science
Growth factor serums work by applying growth factors—specifically human epidermal growth factor (EGF) and fibroblast growth factor—topically to modulate fibroblast and keratinocyte activity and support collagen production. Human fibroblast-derived growth factors provide the strongest evidence. Conditioned media products like SkinMedica TNS use these and show randomized clinical trial data for improved fine lines and skin texture over 60-90 days. Plant-derived growth factors, such as Buddleja davidii meristem cell culture, show in vitro antioxidant and minor bioactive data but lack human clinical evidence. Ferment filtrates like Lactobacillus/Panax ginseng show some data on skin barrier and microbiome effects. Retinol in this serum relies on decades of dermatology research showing that retinol and other retinoids increase epidermal turnover, normalize keratinization, and stimulate procollagen synthesis. ATP as a topical ingredient has less study; it acts mostly as a cosmetic support. Dipeptide diaminobutyroyl benzylamide diacetate (Syn-Ake) shows in vitro data for inhibiting muscle cell calcium influx to soften expression lines, though human clinical data is more limited than for other peptides. Retinol provides the strongest evidence, while the growth factor and peptide components add plausible but less proven benefits.
Dermatologist Perspective
Dermatologists familiar with ZO often recommend Growth Factor Serum to support in-office procedures like microneedling, fractional laser, and radiofrequency, as the soothing silicone base and gentle retinoid activity suit post-procedure recovery. Board-certified dermatologists view the plant growth factor claims with measured enthusiasm—noting the mechanistic plausibility without overclaiming—and usually rely on the retinol, peptide, and delivery system for results. Clinicians pair it with stronger ZO retinoids, vitamin C, and sunscreen in anti-aging regimens, but suggest alternatives for rosacea or fragrance-sensitive patients. Retinol makes pregnancy and breastfeeding absolute contraindications.
Where it fits in your routine.
Apply one to two pumps to clean, dry skin after water-based serums and before moisturizer, morning and night. Use a broad-spectrum SPF 30+ in the morning; the retinol content makes daily sunscreen mandatory. New users start once daily for two weeks, then move to twice daily as tolerated. The ZO protocol often layers it with a stronger retinol treatment at night instead of using it as the only retinoid source. Stop use for 5-7 days before in-office resurfacing unless your provider recommends continuing. Store in the original airless pump container away from heat and direct sunlight.
At $200 for 1 oz, Growth Factor Serum is a premium anti-aging product. Its price matches SkinMedica TNS Advanced+ and other clinical growth factor serums, but exceeds most direct-to-consumer retinol serums significantly. Value depends on your goal: if you want a premium delivery system, retinol, and supporting actives, the price is high but fits the ZO ecosystem. If plant growth factors are the main reason for purchase, the evidence does not justify the cost over a $60-80 retinol serum. Patients following a dermatologist-guided ZO protocol will find it fits their regimen; value shoppers can get similar benefits using a cheaper retinol and a separate peptide serum.
Patients on a ZO protocol can use this fragrance-tolerant daily serum for retinoid activity and post-procedure support. It works best for normal, combination, and dry skin in their 30s and beyond, especially during recovery from microneedling, laser, or RF treatments under a dermatologist's care.
Sensitive skin, rosacea, fragrance allergies, and pregnancy make this product a poor choice. Value shoppers seeking pure retinol or pure growth factor products find cheaper, more honest options. People who react to propylene glycol should look elsewhere.
Product details.
Silky, silicone-rich serum with a blurring, almost primer-like glide.
Soft floral ZO signature fragrance, noticeable on application.
An opaque airless pump bottle protects the light-sensitive retinol and peptide payload.
The silicone matrix gives an immediate soft-focus, blurred-skin effect. Most users experience no irritation or purging because the retinol concentration is low. The 'growth factor work' happens at the cellular level over weeks and is not a daily sensation.
One 1 oz bottle lasts roughly 2-3 months when applied to the face and neck twice daily.
12 months
All Year
The backstory.
Growth Factor Serum was one of ZO's entry points into the growth factor category in the early 2010s, at a time when competitors like SkinMedica TNS were dominating the conversation with human-derived growth factors. ZO deliberately positioned itself on plant and ferment-derived ingredients for biosafety reasons, and then hedged the formula with a retinol underlayer so the product could earn results regardless of how the growth factor science eventually shook out.
About ZO Skin Health
Dr. Zein Obagi founded ZO Skin Health in 2007. The brand sells mostly through U.S. dermatology and plastic surgery offices. Growth Factor Serum uses plant-derived and enzymatically produced growth factors instead of human-derived ones to meet the brand's biosafety position.
Common myths.
Plant growth factors work like human fibroblast growth factors.
They do not. Plant and ferment-derived extracts provide oligopeptides, amino acids, and antioxidants that support skin metabolism, but they do not bind to human growth factor receptors like human-derived EGF or FGF. The evidence base for plant growth factors is meaningful but limited.
Growth factor serums replace retinol.
No growth factor serum shows evidence for collagen stimulation comparable to prescription tretinoin or OTC retinol. ZO includes a supporting-dose retinol here, acknowledging that retinoids do the heavy structural lifting in any credible anti-aging regimen.
FAQ.
Does ZO Growth Factor Serum actually contain growth factors?
It uses plant and ferment-derived extracts ZO calls growth factors: Buddleja davidii meristem cell culture, Lactobacillus/Panax ginseng ferment filtrate, and hydrolyzed vegetable protein. These differ from the human fibroblast-derived growth factors in other clinical serums. Plant growth factor evidence is limited, so the formula adds retinol, peptides, and ATP to support results.
How does it compare to SkinMedica TNS?
SkinMedica TNS uses human fibroblast-derived growth factors. ZO uses plant-derived extracts and ferment filtrates. SkinMedica TNS has more published human clinical data, but the retinol underlayer in ZO provides a retinoid-backed mechanism that SkinMedica TNS lacks. Both are premium products; your choice depends on your comfort with human-derived actives and your retinoid tolerance.
Can I use this after microneedling or laser?
ZO Growth Factor Serum works well post-procedure due to its growth factor and peptide profile, but confirm with your provider first. Many dermatologists wait 24-72 hours after procedures before using retinol-containing products, even at low doses like this one.
Is it safe during pregnancy?
No. The formula contains retinol despite the low concentration. Do not use it during pregnancy or breastfeeding. Use a retinol-free growth factor or peptide serum instead.
Can I use it with vitamin C or other retinoids?
Yes — ZO designs this to work with other treatments. Use Vitamin C in the morning and a stronger retinoid at night alongside Growth Factor Serum in the ZO protocol. Build up slowly if you are new to multi-active routines.
How long until I see results?
The silicone and panthenol base makes skin feel smoother and softer within 1-2 weeks. Tone, fine lines, and texture show visible improvements at 8-12 weeks. Consistent twice-daily use yields the full growth factor-plus-retinol benefit at 12+ weeks.
Why is there propylene glycol in it?
Propylene glycol acts as a solvent and penetration enhancer to deliver actives through the stratum corneum. Most users tolerate it well, but it can sensitize a small subset of people, especially those with a history of contact dermatitis.
What the community says.
"Silky non-greasy texture"
"Skin feels smoother quickly"
"Less irritating than standalone retinol"
"Pairs well with in-office treatments"
"Expensive for 1 oz"
"Contains fragrance"
"Growth factor claims feel overstated"
"Results hard to attribute in a multi-product routine"
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