Hemp was used extensively by the United States during World War II to make uniforms, canvas, and rope. Much of the hemp used was cultivated in Kentucky and the Midwest. During World War II, the U.S. produced a short 1942 film, Hemp for Victory, promoting hemp as a necessary crop to win the war. U.S. farmers participated in the campaign to increase U.S. hemp production to 36,000 acres in 1942. This increase amounted to more than 20 times the production in 1941 before the war effort.
These seeds rank high in plant-based protein as it contains 25% of high-quality protein, which makes it superior to other plant-based superfoods like quinoa, flax, and chia seeds. Furthermore, it is composed of a large number of edible oils and a variety of essential fats in the body, including omega 3 and a rare form of omega-6 called GLA (gamma linoleic acid). As per the USDA National Nutrient Database, these small seeds contain high levels of zinc, magnesium, calcium, phosphorous, iron, and fiber. It also contains vitamin E, copper, manganese, and moderate levels of carbohydrates and fats.
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Although cannabis as a drug and industrial hemp both derive from the species Cannabis sativa and contain the psychoactive component tetrahydrocannabinol (THC), they are distinct strains with unique phytochemical compositions and uses. Hemp has lower concentrations of THC and higher concentrations of cannabidiol (CBD), which decreases or eliminates its psychoactive effects. The legality of industrial hemp varies widely between countries. Some governments regulate the concentration of THC and permit only hemp that is bred with an especially low THC content.
In the UK, the Department for Environment, Food and Rural Affairs treats hemp as a purely non-food crop, but with proper licensing and proof of less than 0.2% THC concentration, hemp seeds can be imported for sowing or for sale as a food or food ingredient. In the U.S., imported hemp can be used legally in food products and, as of 2000, was typically sold in health food stores or through mail order.
The gamma-linoleic acid content of hemp seed works as a hormone regulator for the thyroid and pancreas, and it can reduce many of the symptoms that come from a hormonal imbalance, including severe menopausal symptoms, mood swings, depression, and anxiety. It also can help regulate the hormones that affect weight gain and hunger. Overall, by re-balancing your hormones, your body will work at its optimal and ideal level.
You can press hemp seeds to extract polyunsaturated oil, besides making seed cakes out of it. Oil extracted out of hemp seeds can be mixed with other foods like breads or salads or even eaten plain. You can use grind hemp seed cakes to hemp flour and use it while baking. Another important hemp seeds health benefits is, that oil extracted out of hemp seeds can also be used as an ointment to regenerate and nourish the skin. Hemp oil can penetrate the skin quickly compared to other oils. This helps in preventing skin from sagging due to aging as essential fatty acids completely penetrate the outer skin layer, thereby, encouraging healthy moist skin.
Millennia of selective breeding have resulted in varieties that display a wide range of traits; e.g. suited for a particular environments/latitudes, producing different ratios and compositions of terpenoids and cannabinoids (CBD, THC, CBG, CBC, CBN...etc.), fibre quality, oil/seed yield, etc. Hemp grown for fiber is planted closely, resulting in tall, slender plants with long fibers.
Use of industrial hemp plant and its cultivation was commonplace until the 1900s, when it was associated with its genetic sibling a.k.a. Drug-Type Cannabis species (which contain higher levels of psychoactive THC). Influential groups misconstrued hemp as a dangerous "drug", even though hemp is not a recreational drug and has the potential to be a sustainable and profitable crop for many farmers due to hemps medical, structural and dietary uses.
In the Australian states of Tasmania, Victoria, Queensland, Western Australia, New South Wales, and most recently, South Australia, the state governments have issued licences to grow hemp for industrial use. The first to initiate modern research into the potential of cannabis was the state of Tasmania, which pioneered the licensing of hemp during the early 1990s. The state of Victoria was an early adopter in 1998, and has reissued the regulation in 2008.
The oil contained in the hemp seed is 75-80% polyunsaturated fatty acids (the good fats) and only 9-11% of the lesser desired saturated fatty acids. Hemp seed oil is reputed to be the most unsaturated oil derived from the plant kingdom. The essential fatty acids (EFAs) contained in hemp seed oil are deemed essential because our bodies do not naturally produce them. This means that they must be obtained from the food we eat.
A mixture of fiberglass, hemp fiber, kenaf, and flax has been used since 2002 to make composite panels for automobiles. The choice of which bast fiber to use is primarily based on cost and availability. Various car makers are beginning to use hemp in their cars, including Audi, BMW, Ford, GM, Chrysler, Honda, Iveco, Lotus, Mercedes, Mitsubishi, Porsche, Saturn, Volkswagen and Volvo. For example, the Lotus Eco Elise and the Mercedes C-Class both contain hemp (up to 20 kg in each car in the case of the latter).