Very rancid oil might have a low PV, since it has stopped oxidizing. But it would be high in anicidines. PV varies by oil source, and should always be less than 15 in hempseed. Some very carefully pressed and bottled oils can be as low as 0.5, and olive oil often measures in at 20 because of the easy and low-tech nature of its pressing. Commercial corn oil often goes as high as 60 because the level at which corn oil becomes unpalatable is 100.
Hempseed oil is available from many mail order vendors of hemp products.
Hempseed and oil should always be stored in a cool, dark, and dry place. Currently at least six companies in the Americas market bulk hempseed oil, with most of it pressed in the U.S. under good conditions, some pressed in Canada which is bleached and deodorized, and some pressed in South America under unknown conditions. Certified organic hempseed from Europe is now becoming available. In whole-seed processing the seed is left intact and incorporated as an ingredient in a mixture, such as in Mama Indica's seed treats, or is further processed whole, such as Jamaica Jay's roasted and seasoned snack seeds. Hulled hempseed is the most significant development in hempseed in centuries.