Quick Comparison
| Panthenol (Pro-Vitamin B5) | Petrolatum (Vaseline) | |
|---|---|---|
| Typical Concentration | Concentrations: 1-5% in most products. Up to 5% in healing/repair formulations. Apply morning and night. Safe for all skin types, including very sensitive and compromised skin. No usage limits. | Apply thin layer over damp skin or over other skincare products. Can be used as 'slugging' (applying all over face at night). Safe for daily use. Especially effective over retinoids to buffer irritation. |
| Application | Topical (cream, serum, lotion, ointment). Compatible with all other skincare ingredients. | Topical (ointment, lip balm). Apply as final step to seal in moisture. Thin layer is sufficient. |
| Research Papers | 10 papers | 10 papers |
| Categories |
Mechanism of Action
Panthenol (Pro-Vitamin B5)
Panthenol (D-pantothenic acid alcohol) penetrates the stratum corneum and is converted to pantothenic acid (vitamin B5) by pantetheinase and alkaline phosphatase enzymes in the skin. Pantothenic acid is a precursor to coenzyme A (CoA), which is required for the synthesis of fatty acids (via acetyl-CoA carboxylase and fatty acid synthase) that form the ceramides, cholesterol, and free fatty acids of the stratum corneum lipid barrier. This supports barrier repair, improves lamellar structure, and reduces transepidermal water loss (TEWL). Panthenol has direct humectant properties—its hydroxyl groups attract and bind water in the stratum corneum. It stimulates fibroblast proliferation and migration, accelerating wound healing and re-epithelialization. Panthenol may also have mild anti-inflammatory effects. As a provitamin, it is stable in formulations and well-tolerated. The Bepanthen/Bepanthol healing creams leverage these mechanisms for wound care and barrier repair.
Petrolatum (Vaseline)
Petrolatum is a mixture of long-chain saturated hydrocarbons (C16-C32) that forms a semi-occlusive film—reducing transepidermal water loss (TEWL) by up to 99%. It penetrates intercellular spaces of the stratum corneum, filling gaps in the lipid lamellae and creating a hydrophobic barrier. This occlusive environment raises stratum corneum water content, activating endogenous repair: upregulation of antimicrobial peptides (defensins, cathelicidin LL-37), lamellar body secretion, and barrier lipid synthesis. The stratum corneum obtains oxygen from dermal circulation, not the atmosphere. Studies demonstrate accelerated wound healing and barrier recovery, contradicting infection myths.
Risks & Safety
Panthenol (Pro-Vitamin B5)
Common
None — extremely well-tolerated.
Serious
None. One of the safest skincare ingredients available.
Rare
Contact allergy is extremely rare.
Petrolatum (Vaseline)
Common
Greasy feel. May trap bacteria if applied over unwashed skin (cleanse first).
Serious
None when using cosmetic-grade/USP petrolatum.
Rare
Allergic reaction is extremely rare. Concerns about contamination (PAHs) apply only to industrial-grade, not cosmetic-grade petrolatum.
Full Profiles
Panthenol (Pro-Vitamin B5) →
The provitamin form of vitamin B5 (pantothenic acid) that provides deep hydration, barrier repair, and wound healing support. When applied to skin, panthenol is converted to pantothenic acid, which is a component of coenzyme A — essential for fatty acid synthesis and skin barrier function. It is one of the most common ingredients in moisturizers and healing creams, and is the active ingredient in products like Bepanthen/Bepanthol.
Petrolatum (Vaseline) →
The most effective occlusive ingredient available — petrolatum reduces transepidermal water loss (TEWL) by 99%. Despite misconceptions, it does not clog pores and does not prevent skin from 'breathing.' Dermatologists recommend it universally for barrier repair, wound healing, and locking in moisture. It is the standard against which all other moisturizing ingredients are measured.