Expeller pressing uses a press to physically squeeze the oil out of the seed, rather than use chemicals. With this method, no solvents are used in the process, and therefore there's no chance of having any hexane residue left over.

Is expeller pressed or cold pressed better for skin?

“An expeller compresses the ingredient until its oil is released and then filtered. Because the ingredient undergoes very little processing, its nutrients are better retained" — which explains the cold-pressed juice craze. ... “Heating and solvent methods produce a larger amount of oil,” Kittaneh explains.

Is expeller pressed oil healthy?

Expeller pressed means a machine is putting a good amount of pressure on the plants to extract the oil, and temperature can rise to about 500 degrees F. This is 100% safe, and way better than the kind of heat and processing they use for the oils we just mentioned above.