Cottonseed oil comes from the seeds of cotton plants. Manufacturers use it as a cooking oil and in many processed foods. In supplements, it mainly serves as a carrier oil inside softgel capsules or as a fat source in blends. People rarely take it alone as a supplement. No clear benefits from taking cottonseed oil by itself have been found.
The oil contains a lot of saturated fat. Some processing methods partially hydrogenate it, which can create trans fats. Anyone with a cottonseed allergy should stay away from this oil. The high saturated fat content might matter to people watching their cardiovascular health. Check ingredient labels for partially hydrogenated oils.