Hemp oil or hempseed oil is obtained by pressing hemp seeds. Cold pressed, unrefined hemp oil is dark to clear light green in color, with a nutty flavour. The darker the color, the grassier the flavour. It should not be confused with hash oil, a tetrahydrocannabinol-containing oil made from the Cannabis flower, hailed by some for its medicinal qualities. All hemp oils are derived from the hemp plant, but there are different types depending on the use and purpose.

These are all extracted from the plant in different ways.We have divided the oils into three main categories:
Hemp essential oil
Hemp seed oil
Hemp CBD oil

Hemp Essential Oil
Hemp essential oil comes from the upper leaves and flowers of the hemp plant. The leaves and flowers are then steam distilled to capture the pure essence of the plant. Pale yellow to light green in color with a a highly concentrated therapeutic aroma. It takes over fifty pounds to make 1 ounce of hemp essential oil. It is also one of the most expensive oils in the world – and contains no THC or CBD. Hemp essential oil is well known for its essential oil aroma and therapeutic abilities on the central nervous system. It helps to release stress and relax the body. Its earthy, peppery and faintly sweet scent is alluring and sensual; blending perfectly with other fragrances to perfect the art of aromatherapy.

Hemp Seed Oil
Hemp seed oil comes from the seeds of the hemp plant. There are two different ways hemp seed oil can be processed: Unrefined, cold-pressed hemp seed oil – this oil is green in color with a nutty flavor. Cold pressed hemp oil preserves hemp’s nutritious content, so it is often called “Nature’s most perfectly balanced oil”. It has a limited shelf life and should be stored in the refrigerator
once opened.Refined hemp seed oil – this oil is clear and colorless. It doesn’t have much flavor and also lacks the natural vitamins and antioxidants that hemp is known for. Refined hemp oil is typically used as ingredients for body care products, fuel, lubricants, and even plastics.

Hemp CBD Oil
CBD (Cannabidiol) oil is a a non psychoactive cannabinoid derived from hemp plants mainly for medical use. CBD oils are known to provide safe and effective relief even for patients who suffer from seizures, epilepsy, or cancer. Even though CBD shows much promise, it is still a largely untapped industry. It is rapidly growing because of its growing legal status. Since cultivation in the US is still in its infancy, most CBD oil is imported into the US and then examined for purity and quality before being sold commercially. The regulation behind the CBD oil products are still largely grey and customers should be very cautious of buying products without proper guidance. Learn more about things you should look out for when buying CBD Oil.

DESCRIPTION
Refined hempseed oil is clear and colorless, with little flavor and lacks natural vitamins and antioxidants. Refined hempseed oil is primarily used in body care products. Industrial hempseed oil is used in lubricants, paints, inks, fuel, and plastics. Hempseed oil is used in the production of soaps, shampoos and detergents. The oil has a 3:1 ratio of omega-6 to omega-3 essential fatty acids.

COMPOSITION
About 49% of the weight of hempseed is an edible oil[ that contains 76% as essential fatty acids; i.e., omega-6 fatty acids including linoleic acid (LA, 54%) and gamma-linolenic acid (GLA, 3%), omega-3 alpha-linolenic acid (ALA, 17%) in addition to monounsaturated fat (5% to 11%) and stearidonic acid (2%). Hemp seed oil contains 5% to 7% saturated fat. In common with other oils, hempseed oil provides 9 kcal/g. Compared with other culinary oils it is low in saturated fatty acids.

BENEFITS
Cold pressed hemp oil offers unique benefits among other edible seed oil. It contains a perfectly balanced 3:1 ratio of Omega 6 and Omega 3 essential fatty acids It also contains smaller amounts of 3 other polyunsaturated fatty acids in gamma-linolenic acid (GLA), oleic acid and stearidonic
acid. Great source for Vitamin A & E, includes number of minerals such as calcium, magnesium, sulfur, potassium, phosphorus, iron, and zinc. Has amazing skin care properties. Clinical trials have shown that hemp oil helps dry skin defects and are beneficial for the treatment of eczema and psoriasis. Promotes healthy hair and nails, while reducing inflammation Hemp oil contains no cholesterol, carbohydrates, proteins, sodium or sugar.

Source:
https://ministryofhemp.com/made-from-hemp/oil/#considerations
https://www.news-medical.net/health/Hemp-Oil-Health-Benefits.aspx