Ingredient glossary
Sponge spicules
On your shelf ✓What Sponge spicules does for your skin, who it suits, and what to watch for.
INCI: Hydrolyzed Sponge
In short: Sponge spicules delivers penetration enhancer and exfoliation, suits most skin types, and the evidence behind it is emerging. One thing to know: can irritate, ease in slowly.
- What it does
- Penetration enhancer, exfoliation
- Best for
- Most skin types
- Watch out
- Can irritate, ease in slowly
- Evidence
- Emerging
The Glow take
Nice to have, and nothing to overthink.
Sponge spicules plays a quiet supporting role, rounding out a formula rather than being the reason you buy it.
— Maya
What it does
- penetration enhancer
- exfoliation
Sponge spicules scores -1 on barrier support. It is one of only 8 ingredients in our glossary that go below zero there, and the others are all retinoids. A negative score means it asks something of the barrier rather than giving something back, which is why it needs introducing slowly and pairing with ingredients that do support the barrier. See where it sits against all 235 of them →
emerging evidenceSponge spicules measurably increase skin penetration in laboratory and animal work, but nearly all of it uses marine Haliclona spicules rather than the freshwater material sold as Hydrolyzed Sponge, and no controlled human trial tests a finished cosmetic.
Who it's for, and who should skip it
Tends to suit
- normal
- combo
- oily
Approach with care
- very sensitive
- compromised barrier
- rosacea
- eczema
- Clogs poresLow
- Irritation riskHigh
How it fits each skin type
- DrySuits
- CombinationSuits
- OilySuits
- SensitiveTake care
Take extra care if any of these apply to you: compromised barrier, rosacea, eczema.
Where it fits in your routine
Plays well with
- peptides
- soothing agents
Sponge spicules, answered
Is Sponge spicules safe during pregnancy?
Yes. Sponge spicules is considered safe to use during pregnancy and breastfeeding. As with anything, if you are unsure it is worth a quick word with your doctor or midwife.
Who should avoid Sponge spicules?
Approach Sponge spicules with care if any of these apply to you: very sensitive, compromised barrier, rosacea, and eczema. Its irritation risk is high, so introduce it slowly and patch test first.
What concentration of Sponge spicules actually works?
Its concentration is rarely printed on the label, so use the ingredient list as your clue: near the top third it is likely doing real work, near the bottom it is more of a sprinkle.
Can you mix Sponge spicules with
- Retinol
- Salicylic acid (BHA)
- Lactic acid
- Glycolic acid
- Retinal
- Hydroxypinacolone Retinoate
- Retinyl Palmitate
- Retinyl Acetate
- Retinyl Propionate
- Retinyl Retinoate
- Tretinoin
- Adapalene
- Mandelic Acid
- Gluconolactone
- Lactobionic Acid
- Phytic Acid
- Citric Acid
- Willow Bark Extract
- Capryloyl Salicylic Acid
- Papain
- Bromelain
- Ammonium lactate
This, for every label you own
One ingredient is easy. A full label is where it gets confusing. The Ingredient Decoder reads any product and tells you the honest truth, ingredient by ingredient.
Sources & how we reviewed this
- PMID 34959402abstract only, the full text is paywalled
- PMID 23513460abstract only, the full text is paywalled
- PMID 41310380abstract only, the full text is paywalled
- PMID 39107673abstract only, the full text is paywalled
- PMID 41371418summary page only, the document itself was not read