Reedle spicules, explained
The prickly serums made famous by VT’s Reedle Shot. Tiny needle-like particles that tingle as you apply them.
Early evidence
What it is
Spicules are microscopic, needle-shaped particles, often from marine sponges, sometimes coated in hyaluronic acid or centella. When you massage them in, they lodge in the top layer of skin and create tiny channels. That’s the prickly feeling. The number on products like Reedle Shot 100 or 300 refers to the strength, with higher numbers more intense.
What the research shows
Lab and animal studies show sponge spicules can help other ingredients pass into the skin by creating temporary micro-channels.
Zhang and colleagues, Molecular Pharmaceutics, 2017 [1]
There are few independent human trials of spicule serums for wrinkles or texture, so most claims come from brands.
Seoul River summary of published research
It’s a clever idea, but the evidence is early. Because spicules make skin more permeable, other products can sting more afterwards.
Who it suits
Normal or oily skin that isn’t sensitive, and people curious to try a gentle at-home alternative to clinic treatments. Avoid if your skin is very sensitive, has rosacea, eczema or active breakouts, or is broken.
How to use it after 40
- Start with the lowest strength (such as 100), two or three times a week.
- Don’t use on the same night as retinoids, acids or vitamin C.
- Follow with a gentle, calming moisturiser and wear sunscreen daily.
- Stop if you get lasting redness or stinging.
Sources
This page is general information, not medical advice. Last updated 4 November 2026.
Products with spicules
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