Peptides AcademyPanthenol (Provitamin B5)
How to Use
Panthenol is compatible with all skincare actives and particularly valuable alongside peptides, retinoids, and exfoliating acids where barrier support is needed. Its anti-inflammatory properties help mitigate irritation from active ingredients.
With peptides
Panthenol supports the skin environment that makes peptides most effective. By maintaining barrier integrity and hydration, it ensures that signal peptides reach their targets in the viable epidermis rather than being blocked by a compromised, dehydrated stratum corneum.
With retinol
Panthenol is one of the best companion ingredients for retinol. Apply a panthenol-containing moisturizer after retinol to reduce flaking, redness, and barrier disruption without interfering with retinoid activity. The anti-inflammatory effect helps manage retinization.
Post-procedure
After chemical peels, microneedling, or laser treatments, panthenol at 5%+ concentrations accelerates epidermal repair. Pair with ceramides and hyaluronic acid for comprehensive post-procedure recovery.
Best For
Where this entry is most relevant.
sensitive-skin
Panthenol is one of the few actives that is genuinely anti-inflammatory while also supporting barrier function. For sensitive, reactive, or rosacea-prone skin, panthenol provides active benefit without irritation risk — it calms while it repairs.
anti-aging
Panthenol supports anti-aging routines indirectly by maintaining the barrier health that makes retinoids and peptides tolerable and effective. A healthy barrier retains moisture, which reduces the appearance of fine dehydration lines and allows active anti-aging ingredients to function optimally.
What is it?
Panthenol is the alcohol form of pantothenic acid (vitamin B5) that penetrates the skin and converts to pantothenic acid, where it supports barrier repair, wound healing, and stratum corneum hydration. It is one of the most versatile supporting ingredients in peptide skincare formulations.
How It Works
- 1
Skin penetration and conversion
Panthenol penetrates the stratum corneum efficiently due to its favorable molecular weight (205 Da) and amphiphilic structure. Once inside keratinocytes, it is enzymatically oxidized to pantothenic acid (vitamin B5), the biologically active form.
- 2
Coenzyme A synthesis
Pantothenic acid is the precursor to coenzyme A (CoA), which is essential for lipid synthesis, fatty acid metabolism, and energy production in skin cells. Increased local CoA availability supports the synthesis of barrier lipids (ceramides, cholesterol, free fatty acids) in the stratum corneum.
- 3
Barrier lipid restoration
By fueling the CoA-dependent lipid synthesis pathway, panthenol promotes the formation of intercellular lipid lamellae — the mortar between the corneocyte bricks of the skin barrier. This restores TEWL to normal levels and improves the barrier's resistance to irritants and allergens.
- 4
Anti-inflammatory signaling
Panthenol reduces pro-inflammatory cytokine release (IL-6, IL-8) from stressed keratinocytes and modulates the NF-kB inflammatory pathway. This provides measurable anti-redness and anti-irritation effects, particularly in UV-damaged or chemically stressed skin.
Role
Barrier repair agent, humectant, anti-inflammatory
Evidence
Panthenol's skin benefits are supported by decades of clinical use. A 2002 study (Ebner et al., American Journal of Clinical Dermatology) demonstrated that 5% dexpanthenol significantly accelerated epidermal wound healing and reduced erythema. Panthenol improves stratum corneum hydration by acting as a humectant and by stimulating lipid synthesis in the intercellular matrix. In controlled studies, 2% panthenol reduced TEWL by 20-25% over 4 weeks. Dexpanthenol (the D-isomer of panthenol) is the pharmacologically active form and is used in post-surgical wound care (Bepanthen) with extensive clinical evidence for skin barrier restoration.
Common Formats
How this shows up in practice.
La Roche-Posay Cicaplast Baume B5
Balm
5% panthenol for barrier repair and post-procedure recovery
The Ordinary Hyaluronic Acid 2% + B5
Serum
Panthenol (B5) supports HA-mediated hydration and barrier function
Bepanthen Wound Healing Cream
Cream
Pharmaceutical-grade 5% dexpanthenol for wound and burn healing