Ingredient list › Algin

Does Algin clog pores?

Quick answer: Yes — Algin is one of the higher pore-clogging ingredients (rated 4/5) and is best avoided in leave-on products if you are acne-prone. It is not a common fungal-acne trigger.

4/5
High pore-clogging risk
Comedogenicity scale: 0 = won't clog pores, 5 = very likely to clog pores.
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Algin 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).

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What is Algin?

Algin is a thickener that controls a product's texture. You'll most often see it in gels, serums, masks and lotions, where it controls texture.

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

Is Algin comedogenic?

Algin has a comedogenicity rating of 4/5 — high pore-clogging risk. Remember that where an ingredient sits in the list matters: Algin near the top means a higher concentration and more impact than the same ingredient near the end.

Acne-safe alternatives to Algin

If Algin breaks you out, these lower-rated thickener 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 Algin's 4/5 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.