Ingredient review

Aphanothece Sacrum Extract

INCI: APHANOTHECE SACRUM POWDER

Aphanothece Sacrum is a gentle algae extract that helps hydrate and calm the skin, though research is still emerging.

beautyskincarehumectant

In plain English

This is a type of blue-green algae that is turned into a powder for use in skincare. It helps your skin hold onto moisture and can soothe irritation. Think of it like a natural sponge that also calms redness.

Quick decision guide

Useful, but context matters

Aphanothece Sacrum Extract is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Aphanothece Sacrum Extract.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

emerging

The ingredient may be promising, but claims should be treated more cautiously.

What it is

Aphanothece Sacrum is a freshwater blue-green algae native to Japan, often called 'sacrum algae.' It is harvested, dried, and ground into a fine powder for cosmetic use.

How it works

In skincare, this algae powder absorbs water and forms a thin, hydrating film on the skin's surface. It also contains polysaccharides and amino acids that may help reduce inflammation and support the skin's natural barrier.

Pros

Gentle hydration

Forms a light, non-greasy film that helps skin retain moisture without feeling heavy.

Soothing potential

Contains compounds that may help calm redness and irritation, making it suitable for sensitive skin.

Cons and cautions

Limited research

Most evidence comes from lab studies or traditional use; large-scale human trials are scarce.

Higher cost

As a specialty algae ingredient, it is often more expensive than widely used humectants like glycerin.

Best for

  • People with dry or dehydrated skin
  • Those with sensitive or easily irritated skin

Use caution if

  • Anyone with a known allergy to algae or seaweed

Usage tips

Look for this ingredient in hydrating serums or sheet masks for an extra moisture boost.
Pair with other humectants like glycerin or hyaluronic acid for layered hydration.

Safety summary

Aphanothece Sacrum is considered safe for topical use with a low risk of irritation or allergy. As with any new ingredient, patch test if you have sensitive skin or a known algae allergy.

Research notes

Early studies suggest Aphanothece Sacrum has hydrating and anti-inflammatory properties, but more clinical research is needed to confirm its benefits in humans.

Common label clues

Typical concentration
0.1% to 2%
Regulatory status
Generally recognized as safe for cosmetic use in the US and EU, with no specific restrictions.
Common uses
Moisturizers, Serums, Sheet masks
Environmental note
Harvested from freshwater sources; sustainable farming practices are important to protect natural habitats.

Good to know

  • Aphanothece Sacrum is sometimes called 'sacrum algae' and has been used in Japanese traditional skincare.
  • The powder form is often rehydrated in water-based formulas to activate its gel-like texture.

Common questions

What is Aphanothece Sacrum Extract in beauty products?

This is a type of blue-green algae that is turned into a powder for use in skincare. It helps your skin hold onto moisture and can soothe irritation. Think of it like a natural sponge that also calms redness.

What does Aphanothece Sacrum Extract do in a beauty product?

In skincare, this algae powder absorbs water and forms a thin, hydrating film on the skin's surface. It also contains polysaccharides and amino acids that may help reduce inflammation and support the skin's natural barrier.

Is Aphanothece Sacrum Extract safe for most people?

Aphanothece Sacrum is considered safe for topical use with a low risk of irritation or allergy. As with any new ingredient, patch test if you have sensitive skin or a known algae allergy.

Who should be careful with Aphanothece Sacrum Extract?

Anyone with a known allergy to algae or seaweed

Research sources

INCI Database - Aphanothece Sacrum PowderOpenPubMed - Anti-inflammatory effects of Aphanothece sacrumOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.