PCA

Also known as: Pyrrolidone Carboxylic Acid

PCA, or Pyrrolidone Carboxylic Acid, is a naturally occurring component of the skin's Natural Moisturizing Factor (NMF). It is an excellent humectant, meaning it attracts and holds water, helping to keep the skin hydrated and supple. PCA also plays a role in maintaining the skin barrier function, which is crucial for protecting the skin from environmental stressors.

BenefitGood 3.2 / 4

Hydration i3.2 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

Texture i1.5 / 4

Whether it can improve smoothness and surface texture — roughness, flaking, clogged pores, or unevenness. Exfoliating acids, retinoids, and smoothing moisturizers may score here.

Soothing i1 / 4

Whether it can calm the skin — linked to less redness, irritation, discomfort, or visible reactivity.

Uv protection i0.2 / 4

Whether it provides direct protection against UV radiation.

RiskVery low 0 / 4

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

• Boosts skin hydration
• Supports skin barrier function
• Part of skin's natural moisturizing factor

Products with PCA

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Frequently asked questions

What is PCA and why is it in skincare?

PCA (Pyrrolidone Carboxylic Acid) is a natural humectant found in healthy skin. It's used in skincare to attract and retain moisture, helping to keep the skin hydrated and support its natural barrier.

Is PCA suitable for all skin types?

Yes, PCA is generally well-tolerated by all skin types, including sensitive skin, because it is a component of the skin's own moisturizing system. It is particularly beneficial for dry and dehydrated skin.