Spicules: The Tiny Marine Needles Changing the Way We Treat Skin

A Korean-inspired approach to skin renewal, ingredient delivery and regeneration.

If you've heard me talk about spicules during a treatment, you've probably heard me describe them as millions of microscopic little needles. That sounds dramatic, but it gets surprisingly close to what makes this technology so interesting.

Spicules are one of those skin technologies that sound a little strange until you understand what they are doing. Rather than relying on acid exfoliation, professional spicule treatments use microscopic, needle-like structures derived from certain sponges to create controlled physical stimulation and temporary pathways through the skin's outer barrier.

That makes them especially interesting to me within Korean-inspired and regenerative skin therapy, where the goal is not simply to remove more skin. The better question is often: how can we create the right signal, support renewal and help the ingredients we choose work more intelligently?

What Exactly Is a Spicule?

Spicules form part of the structural skeleton of certain marine and freshwater sponges. Many cosmetic and research applications use silica-rich, sharp-edged, rod-shaped spicules that function almost like naturally occurring microscopic microneedles.

When professionally massaged into the skin, spicules can temporarily disrupt the stratum corneum - our protective outer barrier - and create microscopic pathways. Research has shown that some sponge spicules can remain within the superficial skin for at least 72 hours while gradually disappearing as the barrier recovers. This is one reason the skin may continue to feel prickly or unusually sensitive to touch after the appointment.

Why People Call It 'Liquid Microneedling'

You'll sometimes hear spicules described as liquid microneedling. It is an easy visual comparison, but I don't consider the two treatments interchangeable.

Traditional microneedling uses a device with needles that enter and exit the skin at a controlled depth during the procedure. Spicules are instead massaged onto and into the superficial skin and can continue interacting with it after the treatment is over. Both can create controlled microchannels, but the equipment, depth, duration and biological response are different. I choose between them based on the skin in front of me - not because one is universally better.

Why Delivery Matters

Your skin is extremely good at keeping things out. That's one of its most important jobs - and one of skincare's biggest challenges.

Published studies have shown that sponge spicules can create numerous temporary microchannels and substantially increase the penetration of selected larger molecules. Researchers have studied spicule-assisted delivery of hyaluronic acid, peptides, exosomes and other biologic materials.

That doesn't mean every ingredient placed over spicules automatically travels deep into the skin, and it doesn't make every marketing claim true. Formulation, molecule size, delivery system, spicule type and treatment technique all matter. But the delivery-platform concept itself is real - and it is one reason this area of skin science continues to evolve.

What Can Spicule Therapy Support?

I think of spicules less as a treatment for one single concern and more as a versatile skin-renewal tool. Depending on the formula and intensity, I may consider them when we're working on:

• Uneven or rough texture and dullness

• The appearance of enlarged pores and congestion

• Post-breakout discoloration and uneven tone

• Early signs of photoaging, fine lines and loss of resilience

• Aging skin that would benefit from controlled stimulation

• Enhanced delivery of carefully selected professional ingredients

Emerging clinical and preclinical research is also exploring spicule-based systems for photoaging, acne-related applications, pigmentation and collagen-supportive delivery. The science is promising, but I prefer to distinguish promising research from proven universal outcomes.

Do Spicules Make You Peel?

Sometimes - but not always. Spicules describe a technology, not one universal facial. Some formulas are designed to create more obvious resurfacing and visible shedding. Others use refined spicules primarily for gentle stimulation and ingredient delivery with little to no visible downtime.

More peeling does not automatically mean a better treatment. The right intensity depends on your barrier health, inflammation, pigmentation risk, sensitivity, treatment history and what we are actually trying to accomplish.

What Does It Feel Like?

I won't call it a fluffy-cloud facial. Spicules are prickly.

During application, most clients notice a distinct tingling or tiny needle-like sensation. Afterward, washing or touching the face can feel unusual for a day or two. Depending on the formula, temporary redness, tightness, dryness, sensitivity or light shedding can occur. The experience and aftercare depend on the exact spicule treatment used.

Why Spicules Fit the Luma Philosophy

One reason I'm so drawn to Korean skin therapies is the emphasis on thoughtful layering: protect the barrier, maintain hydration, support recovery, introduce stimulation when appropriate and avoid assuming that stronger always means better.

Spicules fit beautifully into that philosophy because the same underlying technology can be used in very different ways. I can choose more visible resurfacing when renewal is the priority, or a gentler regenerative approach when I want controlled stimulation paired with sophisticated ingredients.

Every technology has a purpose. Every ingredient should have a reason for being there.

SPICULE THERAPIES AT LUMA

Two Ways I Use Spicules at Luma

The two professional spicule therapies I currently use are intentionally different. I choose between them based on the response I want from your skin.

KrX Green Sea Peel

When I want more visible renewal + resurfacing

Green Sea Peel is my more resurfacing-focused spicule treatment. Despite the word 'peel,' its defining action is not a traditional AHA or BHA peel. The professional formula uses hydrolyzed sea sponge spicules with marine-derived ingredients to create mechanical microstimulation and encourage epidermal renewal.

The training formulation includes hydrolyzed sea sponge, Durvillaea antarctica extract and algae extract. Its activator adds skin-supportive ingredients such as sodium hyaluronate and allantoin.

This is the direction I may choose when we're intentionally working on uneven texture, congestion, visible pores, dullness, post-breakout marks, uneven tone or more noticeable resurfacing.

Clients should expect a stronger prickly sensation and may experience dryness or visible shedding in the days that follow. This isn't necessarily the treatment I choose when you need your skin looking perfectly calm tomorrow.

It's the treatment I choose when renewal is the assignment.

Dermathod Rejuragen 2.0 Pro

When I want regeneration + sophisticated ingredient delivery

Rejuragen takes spicule therapy in a different direction. Rather than intentionally creating an obvious peel, this professional system uses refined white spicules alongside a freshly activated treatment formula featuring freezedried collagen, hyaluronic acid, PDRN and exosome-based cosmetic ingredients.

For me, this is less about visible peeling and more about controlled stimulation, hydration and pairing the spicule delivery concept with sophisticated regenerative skincare ingredients.

I may choose Rejuragen when we're working on dehydration, loss of elasticity, early signs of aging, visible pores, uneven texture, dullness or overall skin resilience - especially when I want rejuvenation without asking the skin to go through a more obvious resurfacing cycle.

You may still notice the signature prickly sensation after treatment, but the goal is a gentler, low-downtime approach rather than visible peeling.

So Which One Is Better?

Neither - and that's the point.

• Green Sea Peel: more resurfacing focused.

• Rejuragen: more regeneration and delivery focused.

There will be clients for whom Green Sea Peel makes perfect sense. There will be clients whose skin will benefit more from Rejuragen. And there will be times when I don't choose spicules at all. Your barrier health, pigmentation, inflammation, sensitivity, treatment history, lifestyle and goals all matter. The goal at Luma isn't to perform the strongest treatment your skin can tolerate. It's to choose the treatment your skin will benefit from most.

A Note From Kimberly

The more I study skin, the more fascinated I become by how intelligent it is. My goal isn't to force your skin into behaving differently. It's to understand what it's communicating, decide what it needs, and choose therapies that support its natural ability to renew, repair and become more resilient. Spicules are one of the tools that allow me to do that.

Your skin is always changing. Your treatments should too. - Kimberly Founder | Regenerative Skin Therapist Luma Essence Aesthetics