Parnell Panthenol 5.78 Heartleaf Calming Serum: Clinical-Strength Panthenol for Redness and Barrier Repair

Parnell's Panthenol 5.78 serum is built around a specific, disclosed concentration of panthenol (provitamin B5) at 5.78%, paired with heartleaf extract (Houttuynia cordata), one of Korean skincare's most-validated calming botanicals. Most "panthenol serums" on the market use unspecified percentages well below 3%. Parnell's willingness to disclose 5.78% is unusual and reflects the brand's dermatology-clinic positioning.

Panthenol at 5% plus is the concentration range with actual clinical data for wound healing, redness reduction, and barrier support. The heartleaf addition adds a second calming axis, targeting the inflammation pathways that drive acne flares and sensitized rosacea-pattern redness. This is a barrier repair serum with real dosing, designed for compromised, reactive, or post-procedure skin.

What It Does

Panthenol converts to pantothenic acid in skin, supporting epidermal cell function and water retention. At 5.78%, the serum produces measurable reduction in trans-epidermal water loss over 2 to 4 weeks. Heartleaf contributes anti-inflammatory and mild antimicrobial effects. The combination calms redness, supports healing of irritated skin, and improves barrier resilience. Not a brightening or anti-aging serum; a repair and maintenance serum.

Who It's For

• Sensitized or over-exfoliated skin: Rebuilds barrier over 4 to 6 weeks.
• Rosacea-pattern redness: Calms diffuse redness without triggering flares.
• Post-procedure recovery: Safe after laser, peels, or microneedling once skin is closed.
• Retinol or acid users: Buffer layer under or over actives.
• Acne-prone skin in recovery: Supports healing of post-inflammatory marks.

Key Specs

• Volume: 30ml
• Price: $34.20
• Hero actives: 5.78% panthenol, heartleaf extract
• Texture: lightweight gel-serum, fast absorption
• Fragrance: none
• pH: 5.5, skin-matched

How to Use

Apply AM and PM after toner. Dispense 3 to 4 drops, press into damp skin. Wait 30 to 60 seconds, follow with moisturizer. For post-procedure use: apply twice daily starting 48 to 72 hours after treatment, once skin is closed. During active retinol integration, use this serum as the buffer layer underneath retinol.

FAQ

Why the specific 5.78% number?

It reflects the exact formulation concentration rather than a marketing-rounded number. Parnell discloses this because clinical data on panthenol efficacy clusters around 5% plus. Lower concentrations (1 to 3%) are hydrating but not therapeutically meaningful for barrier repair.

How does this compare to La Roche-Posay Cicaplast B5?

Cicaplast B5 is a balm with 5% panthenol plus madecassoside in an occlusive base. Parnell's serum is a watery gel with 5.78% panthenol plus heartleaf. Cicaplast seals moisture on top; Parnell delivers more penetration. For raw, post-procedure skin: Cicaplast on top. For daily barrier support: Parnell underneath. Many users run both.

How long until I see results?

Redness reduction: 3 to 7 days. Barrier feel: 1 to 2 weeks. Full repair cycle: 4 to 6 weeks.

Can I layer with retinol or vitamin C?

Yes. Panthenol is non-reactive and buffers irritation. Apply this serum first, wait for absorption, then apply retinol or vitamin C. For sensitive users, this reverse-layering cuts retinol sting significantly.

Is this safe for rosacea?

Generally yes. Panthenol and heartleaf are both on the short list of calming actives dermatologists recommend for rosacea. Patch test first, introduce once daily for the first week, then build to twice daily.

Related Products

Pair with Parnell Cicamanu pH Balanced Body Wash for body-wide calming, or any ceramide moisturizer as the sealing step. Browse the full Parnell collection and Korean calming serums.