If you've wandered the skincare aisle in the past few years, you've almost certainly seen the word cica plastered across serums, creams, and ampoules. That little four-letter term comes from Centella asiatica, a humble green herb that has become one of K-beauty's most celebrated ingredients — and now, it's quietly transforming the world of dog grooming, too.

At STUCK SOAP, we hand-select centella asiatica sourced from Jeju Island, Korea, because it offers something most pet products don't: a gentle, clinically studied botanical that calms irritated skin, supports the barrier, and helps coats look healthier over time. If your dog deals with redness, itchiness, flaking, or post-walk rashes, this might be the ingredient you've been missing.

In this guide, we'll break down exactly what centella asiatica is, how it works on canine skin, what veterinary research says about its safety, and how to incorporate it into your grooming routine without overwhelming your pup's skin.

What Is Centella Asiatica (Cica)?

Centella asiatica — also known as gotu kola, tiger grass, or simply cica — is a small, fan-shaped green herb native to Asia. For more than two thousand years, it has been used in Ayurvedic and Traditional Chinese Medicine to accelerate wound healing, calm irritation, and support skin regeneration.

The plant gets its "tiger grass" nickname from an old folk story: tigers were observed rolling in patches of centella to soothe their wounds. Whether or not the legend is true, it captures something real — this plant has a long, consistent history of being used for damaged, inflamed, or vulnerable skin.

In modern K-beauty, centella earned its spotlight because of four key active compounds, often grouped together as "madecassic acid complex": asiaticoside, madecassoside, asiatic acid, and madecassic acid. These triterpenes are what give cica its calming, barrier-restoring reputation — and they work on canine skin for many of the same reasons they work on human skin.

Why Centella Asiatica Matters for Dogs

Dogs have a skin barrier that is thinner and more alkaline than a human's. That means their skin is more prone to dryness, micro-irritation, and environmental stress from things like allergens, pollen, chlorine, and hot pavement. A 2021 veterinary study published in the Journal of Veterinary Clinics tested topical madecassoside cream (a centella-derived ingredient) on dogs and cats with various skin diseases and reported no adverse effects, with visible improvement in lesions.

That's a big deal. Many potent "skin healing" ingredients popular in pet care — like tea tree oil, essential oils, or concentrated herbal tinctures — can actually be too strong for dogs. Centella asiatica sits in a sweet spot: clinically supported, gentle enough for sensitive skin, and safe when properly formulated.

For owners of dogs with:

• Sensitive or reactive skin
• Allergy-prone coats
• Frequent redness between the paws or belly
• Post-bath flakiness or dryness
• A compromised skin barrier from over-bathing

…centella offers a low-risk, high-reward addition to the routine.

The Science: How Cica Heals and Soothes Skin

Centella's benefits aren't folklore — they're biochemistry. Here's what the research shows, simplified.

1. It boosts collagen and keratinocyte activity

Keratinocytes are the cells that rebuild the top layer of skin. According to a systematic review published in the International Journal of Environmental Research and Public Health, centella asiatica stimulates keratinocyte migration and boosts collagen type I synthesis — essentially helping skin rebuild itself faster and stronger. For dogs recovering from scrapes, hot spots, or irritation from allergens, this is huge.

2. It reduces inflammation

Asiaticoside and madecassoside have well-documented anti-inflammatory effects. A 2023 review in Biomedicine & Pharmacotherapy confirmed their immunomodulatory action — they quiet down overactive skin responses that cause redness, itching, and swelling. This is particularly useful during spring and summer, when dogs encounter more environmental allergens.

3. It strengthens the skin barrier

The compounds in centella help skin hold onto moisture and lipids — the two things a healthy barrier needs most. When the barrier is intact, skin loses less water, gets irritated less easily, and feels softer to the touch. Under a stronger barrier, the coat sits smoother and reflects more light, which is often why dogs using cica-based products appear to have "shinier" coats.

4. It's antimicrobial — gently

A 2021 study in the journal Antibiotics demonstrated that centella asiatica extracts show measurable antimicrobial activity against common skin bacteria, without the harshness of synthetic antiseptics. For dogs prone to yeasty paws or mild bacterial flare-ups, this gentle antimicrobial support is a smart addition.

Common Dog Skin Issues Cica Can Help Support

Centella asiatica isn't a medical treatment, and it won't replace a vet visit for diagnosed conditions. But as a supportive ingredient, it can genuinely help with:

Seasonal allergies and itchiness. Many dogs itch themselves raw during pollen season. Cica's calming effect can help reduce the urge-scratch-damage cycle, especially when paired with gentle, pH-balanced bathing.

Post-bath dryness. Over-bathing or using harsh shampoo strips the skin. Centella can help the barrier recover faster so your dog doesn't get that flaky, itchy feeling after grooming.

Redness on the belly, paws, and armpits. These are high-friction, often-contaminated areas. Cica supports the skin without stinging or disrupting the microbiome.

Minor scrapes and healing zones. Because centella accelerates keratinocyte migration, it can help skin look smoother once it's already started healing (always check open wounds with your vet first).

Senior dogs with fragile skin. Aging coats tend to become thinner and drier. Cica's barrier-strengthening effect is a gentle way to support this transition.

How to Use Centella Asiatica in Your Dog's Grooming Routine

The most practical way to introduce centella asiatica to your dog's life is through a properly formulated shampoo. Unlike oral supplements (which require vet guidance and dosing), topical cica in bath products delivers its benefits straight to the skin — exactly where irritation lives.

Here's how to get the most out of it:

1. Bathe at the right cadence. Most healthy adult dogs do well with a bath every 3–4 weeks. Bathing too often — even with a gentle cica shampoo — can still overwhelm the barrier. Less is more.

2. Use lukewarm water. Hot water dilates blood vessels and amplifies itchiness. Lukewarm water keeps the experience calm and lets the cica do its job.

3. Let it sit for 3–5 minutes. Most dog parents rinse shampoo off too fast. Cica compounds need a brief contact window to deposit onto the skin. Massage the lather in, then let your dog wear the shampoo for a few minutes while you praise and reward them.

4. Rinse thoroughly. Residue — even from good ingredients — can cause irritation. Rinse until the water runs completely clear.

5. Pat dry, don't rub. Aggressive towel-drying is one of the most underrated causes of skin irritation. Pat gently and let your dog air-finish if weather allows.

At STUCK SOAP, our Liquid Shampoo and Shampoo Bar both feature Jeju-sourced centella asiatica alongside green tea and camellia oil — the three pillars of our K-beauty inspired formula.

What to Look for in a Cica Dog Shampoo

Not every bottle that claims "cica" actually delivers meaningful benefits. Here's what to check:

Centella asiatica extract listed in the top third of the ingredients. In INCI lists, ingredients are ordered by concentration. If cica is buried near the preservatives, you're paying for marketing, not skincare.

No sulfates, parabens, or artificial fragrance. These undermine the very barrier cica is trying to repair.

pH balanced for dogs (around 6.5–7.5). Human shampoos are too acidic for canine skin. A cica dog shampoo should specifically state that it's formulated for the canine pH range.

Plant-based and transparent about sourcing. Centella from Jeju Island or the highlands of Korea tends to be higher in triterpenoids than commodity-grade extract.

Vegan and cruelty-free certifications. A quality cica product shouldn't have been tested on the animals it's meant to help.

Practical Takeaways

Centella asiatica is one of the few ingredients with strong research in both human dermatology and veterinary medicine. It's gentle, it's clinically supported, and it addresses the most common skin issues modern dogs face — irritation, dryness, and a compromised barrier.

You don't have to overhaul your grooming routine to benefit. Even swapping your current shampoo for one that's thoughtfully formulated with cica, letting it sit during the bath, and rinsing well can make a visible difference within a few wash cycles. Look at your dog's skin and coat 2–3 weeks in: softer fur, less scratching, and fewer pink spots are the signs that cica is doing its quiet, steady work.