Hemp seed oil is manufactured from varieties of Cannabis sativa that do not contain significant amounts of tetrahydrocannabinol (THC), the principal psychoactive element present in the cannabis plant. This manufacturing process typically includes cleaning the seed to 99.99% before pressing the oil. There is no THC within the hemp seed, although trace amounts of THC may be found in hemp seed oil when plant matter adheres to the seed surface during manufacturing. The modern production of hemp seed oil, particularly in Canada, has successfully lowered THC values since 1998. Regular accredited sampling of THC in Canadian hemp seed oil shows THC levels usually below detection limit of 4 ppm (parts per million, or 4 mg/kg). Legal limit for THC content in foodstuffs in Canada is 10 ppm. Some European countries have limits of 5 ppm or none-detected, some EU countries do not have such limits at all.
There are other types of omega-3 fatty acids, but the other omega-3s are typically found in marine animals and plants or fortified products, like eggs. The Dietary Guidelines for Americans currently recommend the consumption of 1.1 to 1.6 grams of ALA each day as part of a healthy diet. However, a 2019 study in the Proceedings of Nutrition Society Journal has said that this value may go up to a total of 2 grams of ALA per day. hemp oil