Agar

Benefits
CleansingSoothingMoisturizing

What is Agar?

Agar, also known as agar-agar, is a gelatinous substance extracted from red algae species like Gelidium and Gracilaria. Chemically, it consists of polysaccharides including agarose, a linear polymer of galactose units, and agaropectin. In cosmetics, it belongs to the category of natural gelling and thickening agents. It functions by forming reversible gels upon cooling, which helps stabilize emulsions, control viscosity for smooth textures, and bind ingredients in formulations like creams, lotions, masks, and solid products. This gel-forming ability improves product spreadability and integrity without synthetic additives. Commonly used in clean beauty products, agar provides a plant-based alternative to animal-derived gelatin, enhancing sensory qualities while maintaining stability across pH ranges.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Binder
Helps hold solid ingredients together to form cohesive tablets, compacts, or sticks, improving pressability, integrity, and wear of the finished product.
Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Binding
Provides cohesion by helping ingredients stick together, improving the strength and integrity of pressed powders, tablets, or solid bars.
Masking
Reduces perception of unpleasant odors or tastes by neutralizing them or covering them with more acceptable sensory notes.

Benefits

Supports cleansing by forming gentle gel structures in washes and masks.

Promotes soothing sensations through its mild, non-irritating properties in formulations.

Aids moisturizing by helping retain water in gel-based products.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
People with sensitive skin seeking low-hazard natural thickeners.
Anyone with rare seaweed allergies.
Individuals preferring vegan, plant-derived binders in their routines.
People sensitive to polysaccharide-based gelling agents.
Those desiring improved texture in moisturizers and cleansers.
Those preferring fragrance-free products due to potential masking roles.

Safety Notes

  • Rated low hazard by EWG with scores of 1.
  • Non-comedogenic at rating 0, suitable for acne-prone skin.

Frequently Asked Questions about Agar

What is agar used for in skincare?

Agar serves as a binder, viscosity controller, and masking agent to improve texture and stability.

Is agar safe for daily use?

Yes, it has a low EWG hazard rating of 1 and is non-comedogenic.

Can agar benefit dry skin?

It helps with moisturizing effects through gel formation that holds hydration.