Ingredient dictionary

Sodium

Sodium is the element that opens the names of many cleansing ingredients, such as soaps and surfactants, the agents that help lift oil and dirt. It is on the label of 3 products in our library. Checked against our library November 6, 2026.

What Sodium does

Forms part of many cleansing agents
Helps lift oil, makeup and dirt
Can help adjust thickness or pH

Sodium is a soft, silvery metal, element number 11 on the periodic table, with the symbol Na. It reacts strongly with water, so it never appears on its own in a skincare product. Instead, you see it inside longer names, where it is bonded to other molecules to make salts, soaps and cleansing agents.

Formulators rely on sodium-based ingredients because they are dependable and well understood. Depending on the full name, they can help lift oil and dirt, build foam, or adjust a product's thickness or pH. How a cleanser feels varies by ingredient, so the full name matters more than the word sodium alone.

Good for

Anyone reading a cleanser label who wants to know which sodium-based ingredient they are looking at.

Frequently asked questions

What is sodium in skincare?

On its own, sodium is a metal that is never used in cosmetics. The word usually appears as the first part of an ingredient name, such as Sodium Chloride or Sodium Lauryl Sulfate, and those names tell you what the sodium is part of.

Is sodium good or bad for skin?

The word sodium on its own does not tell you whether a product will suit your skin. Sodium-based ingredients vary widely in how gentle they feel. Check the full name, and patch test new cleansers if your skin is sensitive.