Since then, many different types of sex determination systems have been discovered, particularly in plants.[15] Dioecy is relatively uncommon in the plant kingdom, and a very low percentage of dioecious plant species have been determined to use the XY system. In most cases where the XY system is found it is believed to have evolved recently and independently.[31]
^ Jump up to: a b c d Boggs, Douglas L; Nguyen, Jacques D; Morgenson, Daralyn; Taffe, Michael A; Ranganathan, Mohini (6 September 2017). "Clinical and preclinical evidence for functional interactions of cannabidiol and Δ9-tetrahydrocannabinol". Neuropsychopharmacology. 43 (1): 142–154. doi:10.1038/npp.2017.209. ISSN 0893-133X. PMC 5719112. PMID 28875990.
The relationship between THC and CBD is complex, but in short, CBD appears to minimize some of THC’s undesirable effects, such as paranoia, heart palpitations, and impaired thinking. Compared with THC in isolation, or its synthetic cousins such as Marinol, the combination of THC and CBD has much greater therapeutic value to patients. This phenomenon of cannabis-derived molecules working better together than they do in isolation is commonly referred to as the entourage effect.
The 2018 Farm Bill changed federal policy regarding industry hemp, including the removal of hemp from the Controlled Substances Act and the consideration of hemp as an agricultural product. The bill legalized hemp under certain restrictions and expanded the definition of industrial hemp from the last 2014 Farm Bill. The bill also allows states and tribes to submit a plan and apply for primary regulatory authority over the production of hemp in their state or in their tribal territory. A state plan must include certain requirements, such as keeping track of land, testing methods,  and disposal of plants or products that exceed the allowed THC concentration.
Medical marijuana in the U.S. is controlled at the state level. Per federal law, cannabis is illegal as noted in the Controlled Substances Act, but the federal government has stated they will not actively prosecute patients and caregivers complying with state medical marijuana laws. However, use of medical marijuana outside of the state laws for illegal use or trafficking will not be tolerated by state or federal government.
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Fatty acids and GLA may also help curb the physical and emotional pain linked to PMS. Here's why: One of the causes of PMS is a hormonal imbalance that leads to a lack of GLA in the body. Research on GLA has shown to help alleviate the symptoms of PMS by bringing hormone levels back into balance. But so far, studies haven't found ingesting or slathering on hemp oil itself will have this effect.
Luke Zigovits, chief executive of Wisconsin-based Hemp Science, said, “We can finally relax. Because now we can source seed, now we can sell our product across state lines. Prohibition is over. It broadens horizons, allowing universities to do research, for example.” Beyond moving the industry into legitimacy, Zigovits said there are opportunities for tobacco farmers in Wisconsin and elsewhere to start growing industrial hemp crops as well.
Still, Blessing notes, amounts below 100 milligrams haven’t even been tested, so it’s not impossible that small amounts may have some effects. As far as anyone knows, heating up CBD doesn’t degrade its effects, and early evidence suggests that taking it along with high-fat food (like a dessert) aids the body’s absorption of the chemical. Beyond that, all anyone has is guesswork. By Chloe didn’t respond to a detailed list of questions about its sourcing and dosing, but I tried a few of the company’s CBD treats anyway. They were all incredibly tasty, and after consuming three cookies in the course of 24 hours, I accidentally fell asleep on my couch at an indeterminate time of the evening and woke up at 4:30 in the morning. Was it the CBD, or was I just tired? Maybe it was a classic placebo effect, in which I expected to be relaxed and became so.
“Geotextiles” or “agricultural textiles” include (1) ground-retaining, biodegradable matting designed to prevent soil erosion, especially to stabilize new plantings while they develop root systems along steep highway banks to prevent soil slippage (Fig. 32); and (2) ground-covers designed to reduce weeds in planting beds (in the manner of plastic mulch). At present the main materials used are polymeric (polythene, spun-blown polypropylene) and some glass fiber and natural fibers. Both woven and non-woven fibers can be applied to geotextiles; woven and knitted materials are stronger and the open structure may be advantageous (e.g. in allowing plants to grow through), but non-wovens are cheaper and better at suppressing weeds. Flax and hemp fibers exposed to water and soil have been claimed to disintegrate rapidly over the course of a few months, which would make them unacceptable for products that need to have long-term stability when exposed to water and oil. Coco (coir) fiber has been said to be much more suitable, due to higher lignin content (40%–50%, compared to 2%–5% in bast fibers); these are much cheaper than flax and hemp fibers (Karus et al. 2000). However, this analysis does not do justice to the developing hemp geotextile market. Production of hemp erosion control mats is continuing in both Europe and Canada. Given the reputation for rot resistance of hemp canvas and rope, it seems probable that ground matting is a legitimate use. Moreover, the ability to last outdoors for many years is frequently undesirable in geotextiles. For example, the widespread current use of plastic netting to reinforce grass sod is quite objectionable, the plastic persisting for many years and interfering with lawn care. Related to geotextile applications is the possibility of using hemp fiber as a planting substrate (biodegradable pots and blocks for plants), and as biodegradable twine to replace plastic ties used to attach plants to supporting poles. Still another consideration is the “green ideal” of producing locally for local needs; by this credo, hemp is preferable in temperate regions to the use of tropical fibers, which need to be imported.
There’s no definite amount that’s appropriate for everyone, but the ratio of CBD to THC will indicate how psychoactive the product is and if it’s legal in your state. The more CBD compared with THC, the less of a high, and vice versa. “Managing psychoactivity is key to successful cannabis therapy,” says Lee. “Amounts should be made clear on the label and lab-certified so people know what’s helping them and what’s not.”
One of CBD’s chief properties is its anticonvulsant nature. Clinical trials have shown that CBD is effective at reducing seizures in children, and the FDA is likely to approve Epidiolex, a pharmaceutical-grade version of CBD for this use, in summer 2018. Although CBD has been documented as an antiepileptic since 1881, CBD’s anticonvulsant mechanisms still remain unclear. Not enough studies have been conducted to understand this relationship fully. One possible explanation for CBD’s neuroprotective effects is its interaction with NMDA receptors, which play a key role in the overly active neuron activity that is a hallmark of epilepsy.
Content updates feature essential information related to the state’s commercial cannabis regulations and guidelines, the licensing application process, and important announcements from the state’s three cannabis licensing authorities and sister agencies. Links to each state agency’s cannabis information are listed towards the bottom of the home page under the “Collaborating State Agencies” section. 
The US Drug Enforcement Administration’s online criminal justice statistics for 2000 (cscmosaic.albany.edu/sourcebook/1995/pdf/t440.pdf) shows the following seizures and eradication of plants of C. sativa: 40,929 outdoor plots (2,597,796 plants), 139,580,728 ditchweed (ruderal plants), 2,361 indoor operations (217,105 plants), for a grand total of 2,814, 903 plants destroyed. Impressively, the species was grown in all 50 states (including outdoor seizures in every state except Wyoming)! It is of course impossible to know exactly how much marijuana is cultivated in the United States, and perhaps only 10% to 20% of the amount grown is seized. The profitability of the illegal crop is indicated by a comparison of the cost of a bushel of corn (roughly $2.50) and a bushel of manicured marijuana (about $70,000; it has been suggested that prices range from $500 a pound, for low-quality marijuana, to more than $5,000 a pound for “boutique” strains like “Northern Lights” and “Afghan Kush”). According to a National Organization for the Reform of Marijuana Laws (NORML) (mir.drugtext.org/marijuananews/marijuana_ranks_fourth_largest_c.htm) marijuana is at least the fourth most valuable crop in America, outranked only by corn, soybeans, and hay. It was estimated that 8.7 million marijuana plants were harvested in 1997, worth $15.1 billion to growers and $25.2 billion on the retail market (the wholesale value was used to compare marijuana to other cash crops). Marijuana was judged to be the largest revenue producing crop in Alabama, California, Colorado, Hawaii, Kentucky, Maine, Rhode Island, Tennessee, Virginia, and West Virginia, and one of the top five cash crops in 29 other states.
In the first decade of the 21st century, the conceptualization of health as an ability opened the door for self-assessments to become the main indicators to judge the performance of efforts aimed at improving human health.[16] It also created the opportunity for every person to feel healthy, even in the presence of multiple chronic diseases, or a terminal condition, and for the re-examination of determinants of health, away from the traditional approach that focuses on the reduction of the prevalence of diseases.[17]
Cannabidiol and cannabidiolic acid work by binding to various receptor targets throughout the central nervous system and the rest of the body.  Acting at these receptor sites, it exerts influence on the metabolism of various neurotransmitter systems.  It seems like ‘snake oil’ that one compound can have all the beneficial effects listed above; however, cannabinoid receptors exist throughout the nervous system and it is known that such a ubiquitous receptor must be involved in nearly everything the nervous system does, just like serotonin and dopamine receptors.  Dopamine affects pleasure, but also pain.  Anxiety and also relaxation.  Heart contraction and blood pressure.  All of these systems are integrated so cannabinoid receptors will indeed have effects on all of these systems and exogenous cannabinoids from plants can definitely have therapeutic effects which are extensive.
Hemp rope was used in the age of sailing ships, though the rope had to be protected by tarring, since hemp rope has a propensity for breaking from rot, as the capillary effect of the rope-woven fibers tended to hold liquid at the interior, while seeming dry from the outside.[44] Tarring was a labor-intensive process, and earned sailors the nickname "Jack Tar". Hemp rope was phased out when manila rope, which does not require tarring, became widely available. Manila is sometimes referred to as Manila hemp, but is not related to hemp; it is abacá, a species of banana.
“The most common symptoms I treat with CBD are inflammatory conditions and it is also often used for pain,” Dr. Amin says. “Dosing is patient dependent. I always start low and go slowly. I have found that 15mg of CBD is a good starting dose for most patients. You have to be careful after that and titrate each patient individually due to the chance of potentially increasing anxiety and depressive symptoms. I have found the most convenient way for most of my patients to consume CBD is through tincture form. But capsules and edibles are also great ways to consume CBD on a daily basis.”
Cannabis is used in three main forms: marijuana, hashish and hash oil. Marijuana is made from dried flowers and leaves of the cannabis plant. It is the least potent of all the cannabis products and is usually smoked or made into edible products like cookies or brownies (see Factsheet: Marijuana Edibles). Hashish is made from the resin (a secreted gum) of the cannabis plant. It is dried and pressed into small blocks and smoked. It can also be added to food and eaten. Hash oil, the most potent cannabis product, is a thick oil obtained from hashish. It is also smoked.
Peltz will be granted options to purchase 19.9 million common shares in the company at C$10.34 ($7.74) a share. The options will vest over a four-year period on a quarterly basis, and the vesting may accelerate if the company meet certain goals, including the consummation of certain defined transactions and the share price being at least at C$31.02 and C$41.36 for a specified number of trading days.
In September 2018, following its approval by the FDA for rare types of childhood epilepsy,[13] Epidiolex was rescheduled (by the Drug Enforcement Administration) as a Schedule V drug to allow for its prescription use.[14] This change applies only to FDA-approved products containing no more than 0.1 percent THC.[14] This allows GW Pharmaceuticals to sell Epidiolex, but it does not apply broadly and all other CBD-containing products remain Schedule I drugs.[14] Epidiolex still requires rescheduling in some states before it can be prescribed in those states.[65][66]
Those warning letters aside, there’s not a lot of federal oversight right now over the claims being made or the products that are being sold. Cohen warned against buying CBD products online, because “there’s a lot of scams out there.” Yet his clinic sells CBD, and he admits, “I say ‘Don’t buy online,’ but ours is worth doing, because we know what we’re doing. We ship all over.”
Hemp products sold in stores are most often made with hemp seed oil, which can contain only trace amounts of full spectrum. While it has been noted that hemp seed oil can be a great source of nutrition, its marginal quantity of “full spectrum” per weight makes it unfeasible as a full spectrum supplement. Our Full Spectrum Hemp Oil, however, is extracted from the stalk of specifically selected hemp cultivars, offering higher percentages of “full spectrum” by weight and additional nutritional benefits from the contents of our oil.
Cannabis lowers the pressure in the eye that causes optic nerve damage leading to glaucoma. Research has shown conclusively that marijuana users experience lower internal eye pressure while the body metabolizes THC. However, the psychoactive side effects of using THC to treat glaucoma make cannabis a nonviable medication for most people with the disease.
^ Jump up to: a b c d Campos AC, Moreira FA, Gomes FV, Del Bel EA, Guimarães FS (December 2012). "Multiple mechanisms involved in the large-spectrum therapeutic potential of cannabidiol in psychiatric disorders". Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences (Review). 367 (1607): 3364–78. doi:10.1098/rstb.2011.0389. PMC 3481531. PMID 23108553.
Genetics, or inherited traits from parents, also play a role in determining the health status of individuals and populations. This can encompass both the predisposition to certain diseases and health conditions, as well as the habits and behaviors individuals develop through the lifestyle of their families. For example, genetics may play a role in the manner in which people cope with stress, either mental, emotional or physical. For example, obesity is a significant problem in the United States that contributes to bad mental health and causes stress in the lives of great numbers of people.[31] (One difficulty is the issue raised by the debate over the relative strengths of genetics and other factors; interactions between genetics and environment may be of particular importance.)
Fig. 6. ‘Finola,’ the first cultivar of Cannabis sativa bred exclusively for grain. (Courtesy of the breeder, J.C. Callaway, Univ. Kuopio, Finland.) Fig. 7. ‘Anka,’ the first registered North American bred cultivar of Cannabis sativa. This variety is best suited for grain production. (Courtesy of the breeder, P. Dragla, and of the Industrial Hemp Seed Development Company, Chatham, Ontario.)

Industrial hemp is marketed a fiber, as a seed, or as a dual-purpose crop. Although detailed market information for hemp ins not readily available, estimates from Vote Hemp show that the total retail value of hemp products in the U.S. in 2017 was $820 million. This includes food and body products, clothing, auto parts, building materials, and other products. 

There is also considerable potential for other industries using hemp in the manner that the automobile industry has demonstrated is feasible. Of course, all other types of transportation vehicles from bicycles to airplanes might make use of such technology. Natural fibers have considerable advantages for use in conveyance (Karus et al. 2000): low density and weight reduction, favorable mechanical, acoustical, and processing properties (including low wear on tools), no splintering in accidents, occupational health benefits (compared to glass fibers), no off-gassing of toxic compounds, and price advantages. Additional types of composite using hemp in combination with other natural fibers, post-industrial plastics or other types of resins, are being used to produce non-woven matting for padding, sound insulation, and other applications.

A 2015 review found that the use of high CBD-to-THC strains of cannabis showed significantly fewer positive symptoms such as delusions and hallucinations, better cognitive function and both lower risk for developing psychosis, as well as a later age of onset of the illness, compared to cannabis with low CBD-to-THC ratios.[279] A 2014 Cochrane review found that research was insufficient to determine the safety and efficacy to using cannabis to treat schizophrenia or psychosis.[280] As of 2017, the molecular mechanisms for the anti-inflammatory and possible pain relieving effects of cannabis are under preliminary research.[281]
A topical rub whose proven ingredients are quickly absorbed through the skin to help melt away tension, muscle aches, joint pains, and symptoms related to rheumatoid arthritis. In fact, HempWorx advertises that CBD products (not Relief Icy Rub, specifically) have been shown to help relieve pain more effectively than opioid painkillers in some instances:
CBD research is still in its infancy because both the substance itself and the cultivation of the plants from which it’s derived have long been illegal in the United States. And despite all those cookies you see for sale, CBD does seem to remain illegal, unless FDA approved. In December, hemp cultivation was legalized nationwide as a provision of the Agriculture Improvement Act of 2018. But the FDA released a statement explicating the agency’s stance on CBD’s legality: In short, the FDA does not recognize a distinction between cannabis- and hemp-derived CBD and, for the time being, considers both to be illegal—especially as a questionably safe food additive. Although CBD isn’t dangerous to healthy people, it can affect how the body metabolizes certain types of medication, which Blessing says could lead to overdose in some cases. (Because of the government shutdown, the FDA is unavailable to explain its stance or enforcement plans in further detail.)
If you really want something that’s ultra-low dose, these goji berries are the way to go. At 1mg THC and 2mg CBD per piece, there’s no going wrong. And it’s even more delicious than Plus Products’ pineapple and coconut gummies. Beware though: They’re beyond tasty so it’s very easy to forget that they actually contain cannabis. The organic goji berries are sourced from Tibet via Imlak’esh Organics and the chocolate complements them perfectly. I could eat three handfuls. But, of course, I won’t.
Another concern is about medications with which CBD might interact. This won’t be an issue with most drugs, says Sunil Kumar Aggarwal, M.D., Ph.D., a palliative medicine physician and scientist who studies cannabis and integrates it into his Seattle medical practice. The exceptions are blood thinners, IV antibiotics, and other drugs whose exact dosing is crucial and must be monitored closely, he says. (Of course, if you have a health problem, talk to your doctor before using CBD, and never take it instead of seeing your physician for a serious condition.)
In Buddhism, cannabis is generally regarded as an intoxicant and may be a hindrance to development of meditation and clear awareness. In ancient Germanic culture, Cannabis was associated with the Norse love goddess, Freya.[121][122] An anointing oil mentioned in Exodus is, by some translators, said to contain Cannabis.[123] Sufis have used Cannabis in a spiritual context since the 13th century CE.[124]
A limited number of studies have examined the effects of cannabis smoking on the respiratory system.[89] Chronic heavy marijuana smoking is associated with coughing, production of sputum, wheezing, and other symptoms of chronic bronchitis.[69] The available evidence does not support a causal relationship between cannabis use and chronic obstructive pulmonary disease.[90] Short-term use of cannabis is associated with bronchodilation.[91] Other side effects of cannabis use include cannabinoid hyperemesis syndrome.[92]
There's plenty of anecdotal evidence that CBD helps treat a variety of ailments. People are turning to oils, gummies, and other CBD food and drink products to relax at the end of a long day. Retired NFL players are using CBD to manage physical pain, debilitating headaches, and sleeplessness. Spa clients are even using CBD skin products to fight signs of aging.
Public health has been described as "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals."[52] It is concerned with threats to the overall health of a community based on population health analysis. The population in question can be as small as a handful of people or as large as all the inhabitants of several continents (for instance, in the case of a pandemic). Public health has many sub-fields, but typically includes the interdisciplinary categories of epidemiology, biostatistics and health services. Environmental health, community health, behavioral health, and occupational health are also important areas of public health.
Deeper pockets are also helping them to dominate CBD products—derived from cannabis but without a high—that are of interest to some of the world’s biggest consumer companies, including... — Carol Ryan, WSJ, "U.S. Cannabis Law Is Helping Canada Make Hay," 27 Feb. 2019 Meanwhile, 10 states and Washington, DC, have legalized the intoxicating form of cannabis for recreational purposes, while 32 states have for medical uses. — German Lopez, Vox, "Trump and Congress just legalized hemp," 20 Dec. 2018 The state’s Cannabis Control Commission has since granted one dispensary a provisional retail license, and another company licenses to grow and transport non-medical cannabis. — Matthew Ormseth, courant.com, "U.S. Attorney in Massachusetts Says Opioids, Not Marijuana, A Priority As State Readies Retail Market," 10 July 2018 The city's mayor Alex Morse believes Holyoke is the ideal location for the cannabis industry in Massachusetts -- and possibly the country. — CBS News, "Holyoke, Massachusetts, is ready to welcome the marijuana industry with open arms," 30 June 2018 Rat offspring exposed to THC — tetrahydrocannabinol, the chief psychoactive ingredient in cannabis — and others that were not had to learn how to press one of two levers to get a sugar pellet reward. — Erik Lacitis, The Seattle Times, "‘Something wasn’t clicking’: WSU study shows offspring of pregnant rats exposed to THC have impaired development," 20 Nov. 2018 It's also derived from cannabidiol (CBD), one of the major compounds found in cannabis. — Sarah Jacoby, SELF, "Updated: What You Need to Know About Epidiolex, the First FDA-Approved Drug Made From Cannabis," 1 Nov. 2018 Attendees must bring their own cannabis, but smoking, edibles, and vaping are all encouraged as part of the creative process and the social experience. — Sarah Shemkus, BostonGlobe.com, "5 marijuana-infused things to do in New England," 21 June 2018 But Salmonella can also turn up in unexpected places — like in tahini, or on cantaloupes, or even drugs like cannabis and kratom. — Rachel Becker, The Verge, "Machine learning could help figure out what pooped on your produce," 12 Dec. 2018
The US Office of National Drug control Policy issued a statement on industrial hemp in 1997 (www.whitehousedrugpolicy.gov/policy/hemp%5Fold.html) which included the following: “Our primary concern about the legalization of the cultivation of industrial hemp (Cannabis sativa) is the message it would send to the public at large, especially to our youth at a time when adolescent drug use is rising rapidly... The second major concern is that legalizing hemp production may mean the de facto legalization of marijuana cultivation. Industrial hemp and marijuana are the product of the same plant, Cannabis sativa... Supporters of the hemp legalization effort claim hemp cultivation could be profitable for US farmers. However, according to the USDA and the US Department of Commerce, the profitability of industrial hemp is highly uncertain and probably unlikely. Hemp is a novelty product with limited sustainable development value even in a novelty market... For every proposed use of industrial hemp, there already exists an available product, or raw material, which is cheaper to manufacture and provides better market results.... Countries with low labor costs such as the Philippines and China have a competitive advantage over any US hemp producer.”

CBD shatter is CBD isolate (which have already discussed above) but in the form of isolated crystals and with terpenes added. Like CBD isolate, it is the purest form of cannabidiol, or CBD, that you can get — it just has some extras added to give it the flavor and strain profile of some other types. In other words, to make CBD shatter, we’ve infused CBD isolate with terpenes.
In December 2012, the U.S. state of Washington became the first state to officially legalize cannabis in a state law (Washington Initiative 502) (but still illegal by federal law),[227] with the state of Colorado following close behind (Colorado Amendment 64).[228] On January 1, 2013, the first marijuana "club" for private marijuana smoking (no buying or selling, however) was allowed for the first time in Colorado.[229] The California Supreme Court decided in May 2013 that local governments can ban medical marijuana dispensaries despite a state law in California that permits the use of cannabis for medical purposes. At least 180 cities across California have enacted bans in recent years.[230]
The earliest recorded uses date from the 3rd millennium BC.[32] Since the early 20th century, cannabis has been subject to legal restrictions. The possession, use, and sale of cannabis is illegal in most countries of the world.[33][34] Medical cannabis refers to the physician-recommended use of cannabis, which takes place in Canada, Belgium, Australia, the Netherlands, Germany, Spain, and 33 U.S. states.[35][36] In September 2018, cannabis was legalized in South Africa[37] while Canada legalized recreational use of cannabis in October 2018.[38]
“We have intellectual property that we’ve developed around how to manage hemp, and that we thought was prudent, because I think hemp is going to happen in the U.S. and when it does, I know that’s not the time to start,” said Canopy Chief Executive Bruce Linton in November’s earnings conference call. “You should have already been started up and ramped up, and get ready to revenue up. We think we are.”
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