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What Are Spicules? The K-Beauty Ingredient Taking Over in 2026
If you’ve spent any time scrolling through K-beauty trends recently, you’ve likely heard the buzz: spicules are having a major moment in 2026. Described as “microneedling in a bottle,” these tiny marine-derived particles are being hailed as the next big thing after PDRN—and for good reason. Unlike traditional skincare ingredients that sit on the surface of your skin, spicules are biodegradable microneedles made from marine sponge that create micro-channels in the skin to enhance absorption and efficacy of active ingredients. Whether you’re a skincare novice or a seasoned routine enthusiast, understanding spicules will help you decide if they’re the right addition to your K-beauty arsenal. In this guide, we’ll break down exactly what they are, how they work, and which products are worth your investment.
What Are Spicules, Exactly?
Spicules are structural skeletons found in marine sponges and in nature can range from being visible to the naked eye to teeny tiny microscopic sizes. In skincare, the spicules that are typically used are composed of silica and shaped like hollow needles. Think of them as microscopic toothpicks derived straight from the ocean—and yes, they’re completely natural.
The magic of spicules lies in their structure. The hollow needles can potentially be used as a vehicle to help skincare active ingredients penetrate skin better, enhancing efficacy. The success of VT Cosmetics lies in coating the spicules with Cica (Centella Asiatica extract) to soothe irritation while enhancing penetration efficiency. This combination creates the perfect formula for delivering results without excessive irritation.
It’s worth noting that skincare manufacturers do not apply raw sponge fragments to the skin—commercial spicule preparations undergo hydrolysis, purification and size refinement to yield microscopic particles small enough to be suspended in liquid or cream bases. So you’re getting a refined, safe, and carefully formulated ingredient, not chunks of actual sponge.
How Do Spicules Actually Work?
Understanding the mechanism behind spicules helps explain why they’re so effective. When you apply a spicule serum, here’s what happens:
Creating Microchannels
While typical cosmetic ingredients take hours to diffuse through the lipid layers between corneocytes or may not penetrate at all, spicules create physical pathways immediately upon application, with research indicating that the delivery efficiency of active ingredients using spicules is reported to be over 72 times higher than simple application.
The micro-channels formed by spicules are maintained for about 72 hours, during which the active ingredients are gradually released through the porous structure of the spicules. Subsequently, they naturally shed along with the stratum corneum in accordance with the skin’s turnover cycle. During this process, the skin recognizes the spicules as foreign substances, promoting cell division in the basal layer and increasing blood flow, which leads to skin regeneration effects.
Physical Exfoliation + Stimulation
When used in skincare they act like tiny microneedles to puncture the skin, stimulate the dermis, exfoliate and rejuvenate by promoting collagen production. This dual action—gently removing dead surface cells while simultaneously stimulating deeper skin renewal—is what gives spicules their “liquid microneedling” nickname.
Enhanced Ingredient Absorption
The tiny needles penetrate the skin, creating little channels that allow active ingredients to penetrate and absorb more efficiently—in some cases up to 60 times more than if you simply applied the product alone. This is why skincare experts recommend using spicules as a “step zero” booster before your other serums and treatments.
Spicules vs. PDRN: What’s the Difference?
You’ve probably heard PDRN mentioned in the same breath as spicules—and for good reason. But they’re quite different ingredients serving different purposes.
PDRN: The Active Ingredient
PDRN has rapidly transitioned from a niche injectable in dermatology clinics to the standout K-beauty ingredient of 2025, appearing in everything from toners to creams. PDRN is a regenerative ingredient—a polydeoxyribonucleotide compound that signals your skin to repair and renew itself. It’s an active that delivers results on its own.
Spicules: The Delivery System
Spicules, by contrast, are primarily a delivery mechanism. Spicules are not an active ingredient by themselves; however, microspicules or biospicules are thought to improve the absorption of skincare products. Hence the benefits of using spicule skincare will depend on the active ingredients that the product contains.
Using Them Together
Brands often pair spicules with high-performance actives such as peptides, polydeoxyribonucleotide (PDRN), exosomes, hyaluronic acid and vitamins. In fact, VT Cosmetics offers a PDRN version of their Reedle Shot that combines both technologies for maximum impact.
Think of it this way: PDRN is the chef’s special dish, while spicules are the express delivery service that ensures it reaches your skin faster and more effectively.
Top 3 Spicule Products Worth Trying
1. VT Cosmetics CICA Reedle Shot 100
The Reedle Shot is labeled with numbers such as 100, 300, and 700 according to the spicule content, allowing users to choose the intensity of pain and effectiveness. The 100 is the perfect entry point.
Reedle Shot 100 delivers mild microneedling stimulation suitable for daily use, making it an ideal exfoliating serum for beginners seeking smoother skin, refined pores, and visible skin texture improvement without the harshness of professional microneedling treatments.
Best for: Beginners, daily use, sensitive skin
2. VT Cosmetics CICA Reedle Shot 300
Once you’ve built tolerance with the 100, the 300 offers a noticeable step-up in intensity. After gaining confidence with Reedle Shot 100, moving up to the 300 concentration felt like the next logical step. From the first application, a stronger—but still tolerable—tingling sensation is felt, a clear sign of deeper exfoliation and enhanced penetration. To prevent over-exfoliation, adjust your routine, using this serum two to three times a week and spacing out applications to allow ample recovery time.
Best for: Building tolerance, addressing texture and fine lines, 2–3× weekly use
3. VT Cosmetics CICA Reedle Shot 700
This is the powerhouse formula for serious skin concerns. For more stubborn skin concerns—like fine lines, persistent texture issues, and pronounced acne scars—VT Reedle Shot 700 delivers powerful results. Given its potency, introduce it into your routine with caution, using it only once every 7–10 days to avoid over-exfoliation. After several weeks, the improvements were undeniable—fine lines around eyes looked softer, and rough forehead felt significantly smoother.
Best for: Deep wrinkles, acne scars, advanced skin concerns, weekly use
How to Use Spicules Safely & Effectively
Application Steps
- Cleanse thoroughly: Use a gentle cleanser and pat skin completely dry. Ensure that your skin is completely dry before applying the Reedle Shot in order to reduce any potential irritation.
- Apply as “Step Zero”: Reedle Shot from VT Cosmetics is a so-called “Step-Zero” booster: you apply it right after cleansing to help prime the skin for what comes next. The formula uses micro-spicules—tiny, needle-like particles that can create a brief tingling sensation.
- Massage thoroughly: All the clinicals had participants massage their spicule test products on skin for 1 to 5 solid minutes. If you’ve ever timed yourself applying serums, this is probably at least 10 times the amount of time you typically take to apply topical products. So the first golden rule for getting the most out of your Reedle Shots is to massage it in thoroughly.
- Follow with hydrating layers: It’s important to follow the Reedle Shot with your other active skin care because the spicules will help your other products absorb better.
- Always use SPF the next day: When you do your morning skincare routine the next day, be sure to moisturize again and apply sunscreen with at least SPF 30.
Frequency Guidelines
- Reedle Shot 50–100: The Reedle Shot 100 can be used daily
- Reedle Shot 300: The Reedle Shot 300 can be used every third day
- Reedle Shot 700: Use once every 7–10 days for advanced concerns
What You’ll Feel (And That’s Normal!)
When you apply a spicule serum, chances are you’ll feel a tingling or prickling sensation. Whilst this is normal, many spicule serums come in different strengths and concentrations. Consumers began to perceive the tingling sensation felt during product application not as a side effect, but as a ‘signal of efficacy’ indicating that active ingredients were penetrating.
Who Should Be Cautious?
Dermatologists caution those with sensitive skin or skin conditions to conduct a patch test before use. Overall, “everyone can benefit from these ingredients,” but a combination of spicules and exfoliants “could be irritating to people with sensitive skin, rosacea, or eczema-prone skin.” While these products have been tested by the brands for sensitive skin, it’s a good idea to “do a small patch test before applying over the full face” if you have sensitivities.
The Big Picture: Why Spicules Are 2026’s Breakthrough
While 2024 and 2025 were the golden years of high-performance ingredients such as retinol, vitamin C, and peptides, 2026 marks the era of ‘Delivery Technology’ that allows these ingredients to penetrate deep into the skin. This signifies not just a change in marketing terminology, but a historic moment where the boundaries between cosmetics and medicine are collapsing.
What makes spicules so revolutionary is their practicality. Consumers, who find it burdensome to receive expensive dermatological treatments each time, have turned their attention to high-functioning home care products that mimic the mechanisms of medical procedures. Products like Reedle Shot have established themselves as alternatives for ‘cost-effective treatments’ by providing similar experiences for just a fraction of the cost of a single treatment.
You don’t need a dermatologist’s office, needles, downtime, or a hefty price tag. You just need a serum and two minutes in your evening routine.
Final Thoughts
Spicules represent a genuine innovation in skincare—one that bridges the gap between professional treatments and affordable, accessible home care. Whether you’re targeting fine lines, acne scars, dull texture, or simply want to maximize the effectiveness of your entire routine, there’s a Reedle Shot concentration for you. Start low (the 100), assess your skin’s tolerance over 2–3 weeks, and consider upgrading only if your skin is ready. The tingly sensation you’ll feel? That’s not a warning sign—it’s proof that one of 2026’s most talked-about K-beauty ingredients is actually working.
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