What Are Growth Factors in Skincare and Why Are They Key to Anti-Aging?

What are growth factors in skincare?

Growth factors are naturally occurring proteins found in human skin. They act as messengers between cells, directing essential biological processes – collagen and elastin production, cellular renewal, barrier function, and vascular health. In younger skin, they are produced in sufficient concentrations to keep those processes running efficiently. With age, their concentration and signaling efficiency decline, and the visible changes in skin density, firmness, and texture follow.

In skincare, growth factors are formulated to replenish that signaling activity – supporting the skin's own processes rather than simply modifying its surface appearance.

How do growth factors work for anti-aging?

Growth factors do not work on the skin's surface. They work at the level of cellular communication, binding to receptors on skin cells and prompting specific biological responses.

Fibroblasts – the cells responsible for producing collagen and elastin – are among the primary targets. As growth factor signaling declines with age, fibroblast activity slows, collagen production decreases, and the structural architecture of skin begins to thin. Topically applied growth factors, when formulated at effective concentrations, support fibroblast activity and the appearance of the structural outcomes it drives: density, thickness, and elasticity.

This is what separates growth factor science from most anti-aging skincare categories. The mechanism is not temporary. It is not a surface-level optical effect. It operates at the level of how skin cells are directed to behave.

What is Human-Comparable Growth Factor Technology?

ZO Skin Health's Growth Factor Serum uses Human-Comparable Growth Factor Technology – five synthesized, bio-identical growth factors: IGF-1, EGF, acidic FGF, basic FGF, and VEGF. These proteins are synthesized to closely replicate the growth factors found naturally in human skin, produced via a process that allows for a high degree of purity and controlled, targeted concentrations.

Each of the five growth factors addresses a complementary function. EGF supports skin rejuvenation and cellular vitality. IGF-1 and the FGF variants contribute to visible improvements in skin thickness and elasticity. VEGF supports optimal nutrient delivery – a factor that underpins the improvements in visible radiance and texture measured in ZO's clinical study.

The precision of this approach – defined proteins at measurable concentrations – is what makes the clinical outcomes predictable and reproducible. ZO has been developing growth factor technology for 18 years. The current formulation is the most advanced expression of that work.

What does the clinical evidence show?

ZO Skin Health conducted a 12-week independent, third-party clinical study of 46 subjects: females aged 44 to 74, across Fitzpatrick skin types II through VI, with moderate to severe signs of aging. Results were measured using validated tools including DermaLab Ultrasound for skin thickness and Cutometer Dual MPA 580 for elasticity.

The outcomes at 8 and 12 weeks:

• 100% of subjects agreed their skin looked lifted and supported
• 98% agreed their skin felt thicker, more cushioned, and more structurally intact
• Subjects felt skin appeared nearly 6 years younger after 8 weeks of use
• 42% improvement in visible radiance and texture, measured by expert grader assessment
• 16% improvement in visible elasticity
• Measurable improvement in the appearance of skin thickness at 8 weeks

The study was conducted with Gentle Cleanser and Sheer Fluid Broad Spectrum Sunscreen SPF 50 as supporting products – a detail that reflects how ZO products are designed to perform: within a system, not independently.

What other ingredients work alongside growth factors?

The Growth Factor Serum combines its growth factor complex with several additional technologies, each targeting a distinct aspect of how skin changes with age.

Disodium Acetyl Glucosamine Phosphate
An enzymatically derived form of N-acetyl glucosamine that supports the appearance of plumpness, thickness, and elasticity.

Lactobacillus/Panax Ginseng Root Extract
A plant-derived fermented red ginseng extract shown to reduce the appearance of lines and wrinkles.

DDBD (Dipeptide Diaminobutyroyl Benzylamide Diacetate)
Temporarily reduces the visible impact of expression lines and contributes to a smoother appearance.

ZPRO®
ZO's proprietary biomimetic sericin protein complex, supporting a more supple and hydrated result.

These ingredients work alongside the growth factor complex rather than in competition with it. The serum is designed to address multiple dimensions of aging skin within a single formulation – density, surface lines, expression-related texture changes, and hydration.

How to use a growth factor serum: layering, timing, and system placement

Growth factors perform best when the skin is properly prepared. Within the ZO system, that begins with Getting Skin Ready® – the three-step sequence of cleanse, exfoliate, and tone that normalizes skin function and maximizes the absorption of everything applied afterward. Exfoliation is mandatory; it is the step that distinguishes an active skin health system from routine cleansing.

After Getting Skin Ready® and Daily Power Defense, apply the Growth Factor Serum to the face and neck. For the eye area, apply Growth Factor Eye Serum using the cooling applicator, tapping gently with the ring finger to minimize pressure on the delicate periorbital skin. If your system includes additional Correct-step products, apply in order from lightest to richest texture.

In the morning, the final step is SPF 40 or higher. Sun protection is not optional when using active anti-aging skincare. UV exposure degrades collagen and undermines the progress that consistent growth factor use supports. ZO's Triple-Spectrum Protection® sunscreens provide coverage against UVA, UVB, HEV light, and IR-A.

Your physician will guide the specific combination of products appropriate for your skin concerns and the correct sequencing within your personal system.