Magnesium Carboxymethyl Beta-Glucan

What is Magnesium Carboxymethyl Beta-Glucan?

Magnesium carboxymethyl beta-glucan is a chemically modified form of beta-glucan, a polysaccharide derived from natural sources such as the cell walls of oats, barley, mushrooms, or yeast. The beta-glucan undergoes carboxymethylation—a process adding carboxyl methyl groups—to boost its water solubility, then forms a magnesium salt for stability. In skincare products, it serves as a skin conditioning agent and humectant, typically in moisturizers, serums, and creams. It works by drawing moisture to the skin, creating a lightweight film that helps lock in hydration and reinforces the skin's protective barrier, promoting a smoother feel without greasiness.

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

Benefits

Supports skin moisture retention through humectant action.

Forms a protective film to aid barrier function.

Provides a soothing effect suitable for daily use.

Who It's For

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

Who May Benefit Who Should Avoid
Individuals with dry or dehydrated skin.
People with known allergies to beta-glucans or polysaccharides.
People seeking gentle hydration in routines.
Those sensitive to magnesium salts.
Those preferring non-greasy conditioning agents.
Users preferring fully unmodified natural ingredients.

Safety Notes

  • Rated low hazard by safety assessments.
  • Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Magnesium Carboxymethyl Beta-Glucan

What is magnesium carboxymethyl beta-glucan?

A modified, soluble salt of beta-glucan polysaccharide used as a skin conditioner and humectant in cosmetics.

Is it safe for sensitive skin?

It shows low irritation potential based on safety data, suitable for many sensitive skin types barring allergies.

Does it clog pores?

It has a comedogenic rating of 0, indicating it does not promote pore clogging.