Ingredient dictionary

Arachidic Acid

Arachidic Acid is a long-chain saturated fatty acid, naturally found in peanut oil, that helps give creams and lotions their body and texture. It is on the label of 10 products in our library. Checked against our library November 6, 2026.

What Arachidic Acid does

Adds body and a thicker texture
Helps keep oil and water blended
Gives lotions a smooth, cushioned feel

Arachidic acid is a long, straight-chain fatty acid made of 20 carbon atoms. It occurs naturally in peanut oil, which is where its name comes from, and in smaller amounts in other plant fats. At room temperature it is a waxy solid.

Formulators use it mainly to add body and structure. In a lotion, it helps the oily and watery parts stay blended, and it gives the product a thicker, more cushioned feel. It usually feels smooth and substantial on the skin rather than slick, so it suits richer body products well.

Good for

Suits body lotions and creams that need a richer, more structured texture.

Frequently asked questions

Is arachidic acid the same as peanut oil?

No. Peanut oil is a mix of many fats, and arachidic acid is just one of the fatty acids in it. Its name points to peanut oil as a natural source, but the ingredient itself is a single fatty acid.

Does arachidic acid moisturize the skin?

Not much on its own. Its main role is to give a formula body and a smooth texture. Hydration usually comes from water and humectants in the product, while fatty acids like this help the lotion feel smooth and comfortable.