Cottonseed oil

What it is

Cottonseed oil is extracted from the seeds left after ginning cotton, then refined to remove gossypol, a natural pigment-toxin the raw oil contains. At about 52% linoleic acid it's high-polyunsaturated. It was the first mass-market industrial seed oil, the basis of early Crisco, and is still used heavily in fried and packaged foods.

Why it's in your food

Cheap and abundant as a cotton byproduct, it's used in frying, snack foods, and shortening. Its long industrial history means it's deeply embedded in processed-food supply chains.

Why your biology objects

~52% linoleic acid, with the ω-6 oxidation concern, plus a history of gossypol (the seed's natural toxin) that refining has to strip out. Cotton isn't grown as a food crop, so the pesticide rules upstream are looser.

The ancestral lens

No one ate cottonseed oil before the late 1800s. Cotton is a fiber crop, and its seed oil is toxic until refined. It's one of the clearest cases of an industrial product becoming food because it was a cheap leftover, delivering linoleic acid at modern doses.

Dose & context

Beyond the linoleic acid, two things are specific to this oil. Refining must remove gossypol, and because cotton is grown for fiber rather than food, the pesticide regime on the plant is less tightly regulated. The oxidation concern under heat and storage is the same as other high-PUFA oils.

Label tricks

Frequently appears as part of an unnamed “vegetable oil” blend. Its presence in “made with plant oils” products carries the same health halo the refining doesn't earn.

What to reach for instead

Stable traditional fats (tallow, butter, ghee, olive oil) carry far less linoleic acid and no gossypol-removal step. For frying especially, a saturated or monounsaturated fat is the more stable choice.