Vitamin B5
INCI: Pantothenic Acid
Humectant and skin conditioning agent
About Vitamin B5
Vitamin B5, officially known as pantothenic acid (or its alcohol derivative, panthenol), is one of those rare ingredients that checks every box in K-beauty formulation. It's a powerhouse humectant that pulls moisture from the air into your skin while simultaneously strengthening your barrier function. Korean brands have championed B5 for decades because it delivers immediate hydration without any heaviness or stickiness, making it perfect for the layered routines K-beauty is famous for. With a perfect 5/5 safety rating and 0/5 comedogenic score, it's truly for everyone. What makes B5 especially valuable is its multi-tasking ability. It doesn't just hydrate, it actively repairs damaged skin, calms inflammation, and helps wounds heal faster. This is why you'll find it in 94 products across Seoul Sister's database, from gentle cleansers like VIDIVICI's Clear Deep Cleansing Oil to intensive treatments like Numbuzin's cult-favorite Pantothenic B5 Active Soothing Cream. Korean chemists love that it plays well with other actives (no conflicts with retinoids, acids, or vitamin C), so they can build complex formulas without worrying about instability. For anyone dealing with dehydration, sensitivity, or compromised barriers, B5 is non-negotiable. It's especially popular in soothing and barrier-repair products because it reduces transepidermal water loss (TEWL) while supporting the skin's natural healing processes.
How Vitamin B5 Works
At the cellular level, pantothenic acid is a precursor to Coenzyme A, which is essential for fatty acid synthesis in your skin cells. When you apply B5 topically, it penetrates easily (its small molecular weight helps here) and gets converted into panthenol in the deeper layers of your epidermis. Once there, it does two critical things. First, it binds water molecules and holds them in your stratum corneum, providing immediate plumping and hydration. Second, it stimulates fibroblast proliferation and accelerates the production of lipids that make up your skin barrier. This is why wounds heal faster with B5, it literally speeds up cell regeneration. B5 also has anti-inflammatory properties. It inhibits the production of certain cytokines that trigger redness and irritation, which is why sensitive skin types see such dramatic calming effects. Unlike hyaluronic acid that just sits on the surface attracting moisture, B5 actually improves your skin's ability to produce and retain its own hydration over time. It's a humectant with long-term benefits, not just temporary relief.
Vitamin B5 by Skin Type
Oily Skin
B5 is ideal for oily skin because it provides lightweight hydration without adding oil or clogging pores (hence the 0/5 comedogenic rating). When oily skin is dehydrated (which happens more often than you'd think), it overproduces sebum to compensate. B5 breaks that cycle by delivering the moisture your skin actually needs, helping regulate oil production over time.
Dry Skin
This is where B5 truly shines. Its humectant properties draw moisture into parched skin, while its barrier-supporting function helps prevent water loss throughout the day. Dry skin types should look for B5 in both hydrating toners and rich creams (like the Blue Bean B5-PDRN Mild Cream from Bringgreen, rated 4.9/5) to layer moisture at multiple steps in their routine.
Combo Skin
Combination skin loves B5 because it addresses both dryness and oiliness without tipping the balance either way. It hydrates dry cheeks without making your T-zone greasy, and it won't trigger breakouts in oily areas. Look for B5 in gel-creams or lightweight serums that absorb quickly and evenly across different zones.
Sensitive Skin
With its 5/5 safety rating and anti-inflammatory properties, B5 is a sensitive skin essential. It actively calms redness and irritation while repairing compromised barriers that make sensitive skin react in the first place. Products like Numbuzin's No. 1 Pantothenic B5 Active Soothing Cream (5.0/5) are specifically formulated to leverage B5's calming power for reactive skin types.
Normal Skin
Even balanced skin benefits from B5's preventative barrier support and consistent hydration. It's an excellent daily ingredient that keeps normal skin resilient against environmental stressors (pollution, climate changes, occasional actives use). Think of it as maintenance hydration that keeps your skin functioning optimally without any drama.
How to Use Vitamin B5
- 1Layer B5 products from thinnest to thickest texture. Start with a B5-infused toner or essence, then seal it with a cream containing panthenol for maximum hydration retention.
- 2B5 is one of the safest ingredients to use with actives. Apply it after exfoliating acids or retinoids to immediately soothe and hydrate skin that might otherwise feel tight or irritated.
- 3If you're dealing with damaged skin barrier (flaking, stinging, redness), use a high-concentration B5 product twice daily until symptoms improve, usually within 3-5 days.
- 4B5 works beautifully in cleansers too (see Parnell's Ceramic Bubble Peeling Cleanser, 5.0/5). Even though it rinses off, it leaves a hydrating film that protects skin during the cleansing process.
Background
Pantothenic acid gets its name from the Greek word 'pantos,' meaning 'everywhere,' because it's found throughout nature in nearly every plant and animal tissue. Vitamin B5 was first isolated in the 1930s by Roger Williams, but its skincare potential wasn't fully recognized until the 1980s when European dermatologists began using panthenol (B5's stable alcohol form) in wound healing creams. Korean beauty brands were relatively early adopters, incorporating B5 into their formulas by the late 1990s as they perfected their signature hydration-layering philosophy. The ingredient's popularity exploded in K-beauty around 2015-2018 when barrier care became a major trend, and consumers started demanding gentle, non-irritating hydrators. Today, B5 is so fundamental to K-beauty that it appears in everything from budget-friendly drugstore lines to luxury treatments, with brands like Numbuzin even building entire product lines around its soothing properties.
K-Beauty Products with Vitamin B5
View all 94 →
Clear Deep Cleansing Oil
VIDIVICI
Ceramic Bubble Peeling Cleanser
Parnell
No. 1 Pantothenic B5 Active Soothing Cream Double Pack
Numbuzin
Glutathione Ampoule Toner
Skin&Lab
No. 5 Glutathione C Facial Spa Cleanser
Numbuzin
Expert Madeca Mela Capture Ampoule Max
Centellian24
Ultra V Idebenone Prestige Ampoule 3ea
Anua
No. 1 Pantothenic B5 Active Soothing Serum
Numbuzin
10 Revolution Real Eye Cream For Face
AHC
Vita Brightening Dark Spot Serum
Rovectin
No. 1 Pantothenic B5 Active Soothing Serum 50ml Refill Set
Numbuzin
Ceramic Cleansing Oil
Parnell
Frequently Asked Questions
What's the difference between pantothenic acid and panthenol in skincare?▼
Can I use vitamin B5 with retinol or vitamin C?▼
How much vitamin B5 should be in a product to actually work?▼
Will vitamin B5 make my oily skin produce less oil?▼
How quickly will I see results from vitamin B5 products?▼
Articles About Vitamin B5
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Niacinamide shows up in nearly every Korean skincare product, from serums to sunscreens. But for a surprising number of people, it triggers cystic acne and breakouts. Here's what's actually going on and how to build a K-beauty routine that works without it.
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