Ingredient list › Algae Extract

Does Algae Extract clog pores?

Quick answer: Yes — Algae Extract is one of the higher pore-clogging ingredients (rated 5/5) and is best avoided in leave-on products if you are acne-prone. It is not a common fungal-acne trigger.

5/5
High pore-clogging risk
Comedogenicity scale: 0 = won't clog pores, 5 = very likely to clog pores.
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Algae Extract sits high on the comedogenic scale. For acne-prone or breakout-prone skin it is one of the ingredients most likely to block pores and contribute to blackheads, whiteheads and pimples, especially when it appears near the top of an ingredient list (higher concentration).

Check a full ingredient list →

What is Algae Extract?

Algae Extract is a marine-derived (algae/seaweed) extract. On an ingredient label it may also appear as algae. You'll most often see it in hydrating serums, masks and 'marine' or 'algae' branded products.

Fungal-acne (Malassezia) safe? Yes — it is not on common Malassezia (fungal acne) trigger lists. Check a whole product for fungal-acne triggers →

Is Algae Extract comedogenic?

Algae Extract has a comedogenicity rating of 5/5 — high pore-clogging risk. Remember that where an ingredient sits in the list matters: Algae Extract near the top means a higher concentration and more impact than the same ingredient near the end.

Acne-safe alternatives to Algae Extract

If Algae Extract breaks you out, these lower-rated marine options are far less likely to clog pores:

How we rate comedogenicity — and its limits

The 0–5 comedogenicity scale comes from dermatology research that measured how much individual ingredients clogged pores, originally using the rabbit-ear assay (Fulton et al., 1984). A rating reflects an ingredient's potential to clog pores at high concentration — not a guarantee that any finished product will break you out.

That distinction matters. A later review (Draelos & DiNardo, 2006) found that a single ingredient's comedogenic score does not reliably predict how a complete formula behaves on real skin: concentration, the rest of the formula, and your own skin all change the result. So read Algae Extract's 5/5 as a risk signal — most useful when the ingredient sits near the top of the list — rather than a verdict on one specific product.

AcneSafeCheck compiles published comedogenicity ratings and dermatology references into one searchable database. It is educational, not a lab test of your specific product, and not medical advice.

References

  1. Fulton JE Jr, Pay SR, Fulton JE III. Comedogenicity of current therapeutic products, cosmetics, and ingredients in the rabbit ear. J Am Acad Dermatol. 1984;10(1):96–105. PubMed
  2. Draelos ZD, DiNardo JC. A re-evaluation of the comedogenicity concept. J Am Acad Dermatol. 2006;54(3):507–512. PubMed
  3. American Academy of Dermatology. Acne: causes, treatment and skin-care guidance. aad.org

By Mitchell Zandwijken · Rated against the published comedogenicity references above · Last updated July 2026.

Note: Informational only, not medical advice. Real-world effects depend on concentration, the full formula and your individual skin.