hailmaryjane.com

# Hail Mary Jane

> Cannabis education and product discovery since 2008. Independent, sourced guides to CBD, THC, vaporizers and gear. Educational content, not medical advice. We never sell product; we link to where to buy.

## CBD

- [CBD: what it is and what it is not](https://www.hailmaryjane.com/cbd/): CBD is a cannabinoid that does not get you high. Products differ enormously in what they contain, and the label is often the least reliable part. Start here, then pick a use, a brand or a product type.
- [Can you vape CBD oil? The distinction that matters](https://www.hailmaryjane.com/cbd/can-you-vape-cbd-oil/): No — not the oil in a dropper bottle. CBD tinctures are carried in MCT or hemp seed oil, which is made to be swallowed; inhaling oil droplets has caused lung injury. CBD vape liquid is a different product built on propylene glycol and vegetable glycerin.
- [CBD and anxiety: what the trials actually measured](https://www.hailmaryjane.com/cbd/cbd-for-anxiety-and-depression/): Three randomised trials have measured CBD against placebo for anxiety, and two found it lowered anxiety before a public-speaking test. The dose that worked sat in the middle of the range. Nothing comparable has been published for depression.
- [CBD and arthritis: what the trials actually found](https://www.hailmaryjane.com/cbd/best-cbd-for-arthritis-pain/): A 2022 randomised trial found CBD indistinguishable from placebo for arthritis pain over twelve weeks. Animal studies look better, and many people report benefit. This page keeps those three kinds of evidence apart.
- [CBD and diabetes: what the one trial measured](https://www.hailmaryjane.com/cbd/best-cbd-for-diabetes/): The one randomised trial to test CBD in type 2 diabetes found no glycaemic effect. The arm that did move the numbers was THCV, a different cannabinoid, and the medicine-interaction question matters more than either.
- [CBD and nausea: what the research has examined](https://www.hailmaryjane.com/cbd/does-cbd-help-with-nausea/): The cannabinoid medicines licensed for chemotherapy-induced nausea contain THC. CBD suppresses nausea in animal models through a serotonin receptor rather than a cannabinoid one, with a biphasic dose-response, and that work has not been repeated in a human trial.
- [CBD and sleep: what the research has examined](https://www.hailmaryjane.com/cbd/cbd-for-sleep/): The one randomised crossover study of CBD and the sleep-wake cycle found no change in healthy adults at 300 mg. The encouraging numbers come from an uncontrolled case series, and most products on sale pair CBD with melatonin or CBN, which makes the cannabinoid the hardest ingredient to credit.
- [CBD and weight loss: what was measured](https://www.hailmaryjane.com/cbd/cbd-oil-for-weight-loss/): No randomised trial has shown CBD produces weight loss in humans. The case rests on cell and rodent work about the browning of fat. The one trial that measured metabolic outcomes in people found no change in its CBD arm — the arm that moved was a different cannabinoid.
- [CBD bath bombs: what a bath can deliver](https://www.hailmaryjane.com/cbd/cbd-bath-bombs/): A bath bomb disperses its CBD through the whole tub, so the amount meeting any patch of skin is very small. Warm water has real, measured effects on muscle and sleep of its own, which is the honest explanation for why the bath helps.
- [CBD capsules: the format that measures itself](https://www.hailmaryjane.com/cbd/best-cbd-capsules/): A capsule is the only CBD format with a dose you cannot misjudge, which makes it the right tool for finding out whether CBD does anything for you. It is also the route that delivers least of what you swallow — unless you take it with a meal, which changes the amount several-fold.
- [CBD cream: the one format with a trial behind it](https://www.hailmaryjane.com/cbd/cbd-cream/): A topical is the one CBD format with a positive randomised trial of its own — on peripheral neuropathy, over four weeks. It is also the format where most of what you feel on the skin comes from menthol or camphor rather than from the cannabinoid.
- [CBD dosage: what the pharmacology actually says](https://www.hailmaryjane.com/cbd/cbd-oil-dosage/): No CBD dose is established for any over-the-counter purpose. What is known is how the compound behaves: oral absorption is poor and variable, a fatty meal multiplies how much reaches the blood, and where doses have been compared directly the middle one sometimes did what the highest did not.
- [CBD for dogs: where the trials are better](https://www.hailmaryjane.com/cbd/cbd-oil-for-dogs/): The veterinary evidence is stronger than the human evidence. A randomised crossover trial in osteoarthritic dogs found less pain and more activity at 2 mg per kilogram twice daily, and a randomised trial in canine epilepsy found fewer seizures. Both found a liver enzyme rising in some dogs.
- [CBD for pain: what the research has measured](https://www.hailmaryjane.com/cbd/cbd-for-pain/): The largest reviews of cannabinoids for chronic pain find small effects and low-quality evidence, and the international pain society declined to endorse them. The clearest CBD-specific results are a null trial in arthritis and a small positive one in peripheral neuropathy.
- [CBD isolate: what purity costs you](https://www.hailmaryjane.com/cbd/cbd-isolate/): Isolate is CBD with everything else stripped out: no THC, no terpenes, no other cannabinoids. That makes it the only form in which an effect can be attributed to CBD alone, and the form in which a bell-shaped dose curve was demonstrated in mice.
- [CBD JUUL pods: what they are and who makes them](https://www.hailmaryjane.com/cbd/cbd-juul-pods/): JUUL Labs does not make a CBD pod. Everything sold as one is a third-party product built to fit the device, which means there is no manufacturer standard behind it — the entire question is what testing the brand publishes, on a shelf where undeclared compounds have been found.
- [CBD lip balm: what is actually in it](https://www.hailmaryjane.com/cbd/cbd-lip-balm/): A lip balm works by putting an occlusive layer over skin that has almost no barrier of its own, and beeswax, shea and petrolatum do that. Nothing has tested CBD on lips, so the cannabinoid is the ingredient with the least to say for itself on the tube.
- [CBD muscle rub: what is doing the work](https://www.hailmaryjane.com/cbd/cbd-muscle-rub/): A muscle rub announces itself within seconds, and that is the menthol or the camphor doing what counter-irritants do. What the CBD adds is a separate question, and the only randomised evidence for topical CBD comes from a small trial in nerve pain rather than muscle soreness.
- [CBD skincare: what the laboratory found](https://www.hailmaryjane.com/cbd/cbd-for-skin-care/): The case for CBD in skincare rests largely on a 2014 study of human oil-producing cells in culture, which found CBD reduced oil production and inflammatory markers. Nothing since has taken that to a randomised trial on faces, and the rest of the jar is doing work the cannabinoid gets credited for.
- [CBD vape cartridges: what to check first](https://www.hailmaryjane.com/cbd/cbd-vape-cartridges/): A cartridge is sealed, which means everything knowable about it comes from the label and the batch certificate. This covers what those should say, what the 510 thread does and does not guarantee, and why thickening agents are the part of this category with a body count.
- [CBD vape juice: what is in the bottle](https://www.hailmaryjane.com/cbd/cbd-vape-juice/): CBD vape juice is a carrier of propylene glycol and vegetable glycerin, a flavouring and the cannabinoid. Which carrier ratio, how many milligrams per millilitre and whether a batch certificate exists are the only questions that separate one bottle from another.
- [CBD vape oil: how to tell one from another](https://www.hailmaryjane.com/cbd/best-cbd-vape-oils/): CBD vape oil is propylene glycol and vegetable glycerin carrying CBD, and the difference between one bottle and the next is what the certificate says rather than what the flavour promises. Undeclared compounds have been found in this category more than once.
- [CBD water: the format the chemistry argues with](https://www.hailmaryjane.com/cbd/cbd-water/): CBD is not water-soluble, so CBD water is an emulsion held together by processing. The doses are the smallest of any format, and cannabinoids degrade with light and time — which is a problem for a clear bottle sitting under shop lights.
- [CBD wax and shatter: what dabbing changes](https://www.hailmaryjane.com/cbd/cbd-wax/): CBD wax, shatter and crumble are the same cannabinoid at higher purity, differing in texture rather than in kind. What separates dabbing from other routes is temperature: research on concentrates has found degradation products forming when they are heated too hot.
- [Does CBD help migraines? What has been studied](https://www.hailmaryjane.com/cbd/does-cbd-help-migraines/): No randomised controlled trial has tested CBD on its own for migraine. The largest dataset is a study of roughly 12,000 self-reported cannabis sessions, which found headache and migraine ratings fell by about half — and that the effect weakened as people used more.
- [Does CBD lower blood pressure? What was measured](https://www.hailmaryjane.com/cbd/can-cbd-lower-blood-pressure/): A single 600 mg dose of CBD lowered resting systolic blood pressure by around 6 mmHg in nine healthy men. When the same research group dosed volunteers for a week, the acute effect was there on day one and gone by day seven.
- [Does CBD make you hungry? What trials reported](https://www.hailmaryjane.com/cbd/does-cbd-make-you-hungry/): The munchies are a THC effect, produced at the CB1 receptor that CBD does not activate. In the high-dose trials that took purified CBD through regulatory review, decreased appetite was among the commonly reported side effects — the opposite of what the question expects.
- [Does CBD make your eyes red? What causes it](https://www.hailmaryjane.com/cbd/does-cbd-make-your-eyes-red/): Red eyes after cannabis are a THC effect — it widens the small blood vessels on the surface of the eye. CBD has no established effect of that kind, so a CBD product that reddens eyes points either at undeclared THC or at something else entirely.
- [Does CBD thin your blood? What is documented](https://www.hailmaryjane.com/cbd/does-cbd-thin-blood/): CBD is not a blood thinner in its own right. What is documented is an interaction: it inhibits the liver enzymes that clear warfarin, and a published case report describes a patient whose INR climbed until the warfarin dose was cut by about thirty per cent.
- [Hemp oil for hair: seed oil, not CBD](https://www.hailmaryjane.com/cbd/hemp-oil-for-hair/): Almost every hemp hair product is hemp seed oil, pressed from seeds and containing essentially no cannabinoids. It is a light, linoleic-acid-rich emollient with a real job to do on hair — which is a different product from the CBD the packaging implies.
- [How long do CBD effects last?](https://www.hailmaryjane.com/cbd/how-long-do-cbd-effects-last/): Most routes put the useful window somewhere between two and six hours, with wide variation between people and between studies. How long CBD stays detectable in the body is a separate question with a much longer answer, and the two are often confused.
- [How long does CBD take to work?](https://www.hailmaryjane.com/cbd/how-long-does-cbd-take-to-work/): Onset depends on route: minutes when inhaled, fifteen to forty-five minutes held under the tongue, and thirty minutes to two hours when swallowed. Food changes how much reaches the blood more than the dose does, and a fortnight is the honest window for anything gradual.
- [How much CBD should you vape? Working it out](https://www.hailmaryjane.com/cbd/how-much-cbd-should-i-vape/): No inhaled dose of CBD is established for any over-the-counter purpose, and a puff is not a unit of anything. What you can do is turn the milligrams on the cartridge into an approximate amount per puff, then hold every other variable still while you find out whether it does anything.

## THC

- [THC: what it is and what changes the effect](https://www.hailmaryjane.com/thc/): THC is the cannabinoid that produces the high. How strong that is, how quickly it arrives and how long it lasts depend far more on the format and the dose than on the percentage printed on the package. Start with what each format does, then read the lab report.
- [How Much THC Is in a Typical Joint? Your Questions Answered](https://www.hailmaryjane.com/thc/how-much-thc/): There are so many variables that can affect how much THC gets into your system from smoking a joint.
- [JUUL THC pods: there is no such thing](https://www.hailmaryjane.com/thc/thc-juul-pods/): JUUL Labs has never manufactured a THC pod. Everything sold as one is either a third-party pod built to fit the device or a refilled counterfeit, which places it in exactly the informal supply chain that 78 per cent of EVALI patients had bought from.
- [THC and anxiety: the dose turns it around](https://www.hailmaryjane.com/thc/thc-for-anxiety/): In a controlled trial, 7.5 mg of oral THC reduced distress after a standardised stress task while 12.5 mg increased negative mood and worsened performance. The largest meta-analysis of cannabinoids in mental disorders found scarce evidence of benefit in depression and very low quality evidence in anxiety.
- [THC and pain: how big the effect really is](https://www.hailmaryjane.com/thc/thc-for-pain/): The BMJ meta-analysis found non-inhaled medical cannabis probably produces a small increase in the proportion of patients reaching a minimally important improvement in pain, a risk difference of about 10 per cent. The January 2026 Cochrane review of neuropathic pain found no clear benefit at low certainty.
- [THC and sleep: what the trials found](https://www.hailmaryjane.com/thc/thc-for-sleep/): THC shortens the time it takes to fall asleep in short studies and suppresses REM sleep. Tolerance to both builds within days, and stopping makes sleep worse before it gets better. The best-studied use, dronabinol for obstructive sleep apnoea, was advised against by the American Academy of Sleep Medicine.
- [THC cartridges: how to judge one](https://www.hailmaryjane.com/thc/thc-oil-cartridges/): A THC cartridge is distillate plus terpenes in a 510-threaded tank. What separates a good one from a bad one is the terpene source, the batch certificate and the hardware, not the potency printed on the box. The 2019 vaping outbreak showed the difference was mostly about where the cartridge came from.
- [THC vape juice: what it actually is](https://www.hailmaryjane.com/thc/thc-vape-juice/): THC vape juice describes two different liquids sold under one name: cannabis distillate mixed with terpenes for a concentrate device, and a thin e-liquid meant for nicotine-style hardware. The difference matters because the thinning agents that make the second possible are what the 2019 outbreak was about.
- [THC vape pens: the cartridge is the risk](https://www.hailmaryjane.com/thc/thc-vape-pens/): A THC vape pen is a battery and a cartridge, and almost everything that matters is in the cartridge. The battery is a commodity. What the oil is, who made it, what the coil does with it and where you bought it are the four questions, and only the last one is fully in your control.

## Guides

- [How to use a dry herb vaporizer](https://www.hailmaryjane.com/guides/how-to-use-a-dry-herb-vaporizer/): Grind medium-fine, fill the chamber loosely, start low and step up in small increments. Draw slowly for four to six seconds. Almost every harsh first session is a grind or a temperature problem rather than a fault in the device.
- [Indica vs sativa: what the labels tell you](https://www.hailmaryjane.com/guides/indica-vs-sativa-effects/): Indica and sativa describe plant shape, not effect. A genome-wide study of commercial cannabis found samples sold under the two labels genetically indistinct, with the labels tracking a small number of terpenes rather than anything you could call a category.

## Products

- [Accessories](https://www.hailmaryjane.com/products/accessories/)
- [Cannabis cigars, cannagars and Thai sticks](https://www.hailmaryjane.com/products/cannabis-cigars/): A cannabis cigar, or cannagar, is compressed cannabis wrapped in a cured cannabis or hemp leaf and aged. The wrap is the whole distinction: a blunt is rolled in tobacco leaf and carries nicotine with it, while a cannagar carries none. Everything else follows from the mold and the curing.
- [Cannabutter Machines](https://www.hailmaryjane.com/products/cannabutter-machines/): A cannabutter machine is a heated, stirred vessel that decarboxylates cannabis and then infuses it into fat. The chemistry it automates is simple and unforgiving: too little heat and nothing converts, too much and what converted degrades. Judge one on its temperature control before anything else.
- [Electric weed grinders: what they give up](https://www.hailmaryjane.com/products/best-electric-weed-grinders/): An electric grinder replaces the pinch grip and forearm twist a manual one needs with a button press. Nearly all of them give up the kief screen to do it, which is the trade almost no listing mentions. The four devices worth naming do four different jobs.
- [Grinders](https://www.hailmaryjane.com/products/grinders/): A grinder does two jobs: it reduces flower to pieces of even size so it burns evenly, and it collects the resin heads that would otherwise stick to your fingers. Three things decide whether one is any good: the tooth geometry, the micron rating of the screen, and whether the aluminium is properly anodised.
- [How to grind weed without a grinder](https://www.hailmaryjane.com/products/how-to-grind-without-a-grinder/): Scissors in a shot glass is the best substitute and the only one that comes close to an even grind. Everything else in the kitchen trades resin, evenness or hygiene for convenience. The two to avoid are a coin in a container and a coffee grinder you also make coffee in.
- [How to use a weed grinder properly](https://www.hailmaryjane.com/products/how-to-use-a-weed-grinder/): Break the flower into a few pieces, load them around the outer ring of the teeth rather than over the centre post, close the lid and turn it about ten times. Stop when the resistance goes. Almost every complaint people have about a grinder is a complaint about grinding for too long.
- [Pax Era pods: what the chip knows](https://www.hailmaryjane.com/products/pax-era-pods/): A Pax Era pod is a sealed cartridge of cannabis oil, filled by a licensed producer rather than by Pax, that clips into a Pax battery. The newer ones carry a chip holding the batch data and laboratory results, which is the feature worth buying the system for.
- [Pre-Rolls](https://www.hailmaryjane.com/products/pre-rolls/): A pre-roll is a ready-made joint sold over a dispensary counter. What is inside is not always flower: California defines a pre-roll as any combination of flower, shake, leaf or kief rolled in paper. Reading the label and looking at the grind is how you tell which one you are buying.
- [Vaporizers](https://www.hailmaryjane.com/products/vaporizers/): A vaporizer heats cannabis until its active compounds come off as vapour without the material catching fire. How it applies that heat, not what number is on the dial, is what separates one from another: four devices run at an identical 210 degrees delivered between 54 and 83 per cent of their THC.
- [Weed Subscription Boxes](https://www.hailmaryjane.com/products/subscription-boxes/): A weed subscription box is a monthly parcel of smoking accessories: papers, a grinder, a lighter and usually a piece of glass. Almost none of them contain cannabis, because the mail will not carry it. What you are buying is a recurring charge against contents you do not see in advance.

## Reviews

- [CBDfx review: a wide range, openly tested](https://www.hailmaryjane.com/reviews/cbdfx-review/): CBDfx sells one of the widest ranges in the category and publishes independent lab reports for it, from ISO 17025-accredited laboratories. What the reports do not state on the overview page is which contaminants are covered, which is the gap between publishing certificates and being transparent.
- [cbdMD review: broad spectrum, and now THC too](https://www.hailmaryjane.com/reviews/cbdmd-review-is-it-worth-it/): cbdMD sells broad-spectrum and full-spectrum CBD across every common format, and now delta-9 THC and THCV products alongside them. It states independent testing and links lab results; what the site does not make obvious is whether you can find the report for your own batch.
- [Daily High Club review: cancel by the 15th](https://www.hailmaryjane.com/reviews/daily-high-club-review/): Daily High Club, formerly Dollar High Club, no longer sells the three tiers our old review described. It sells one box on four commitment lengths, and it publishes something most of this category does not: a cancellation cut-off you can read before you subscribe.
- [G Pen Elite II review: the ceramic oven](https://www.hailmaryjane.com/reviews/g-pen-elite-ii-vape-review/): The Elite II is the device where Grenco stopped building pens and built an oven. A full ceramic chamber, temperature set to the degree on an onboard screen, and a convection boost that fires while you draw. It holds half a gram of flower and it will not take concentrates.
- [G Pen Gio review: the closed system](https://www.hailmaryjane.com/reviews/g-pen-gio-review/): The Gio is a battery with a magnet on it, and that is deliberate. Everything interesting about a sealed pod system is upstream of the device: who filled the pod, what they put in it, and whether the coil it sits on knows how hot it is. The hardware is almost beside the point.
- [G Pen Pro review: the silicone problem](https://www.hailmaryjane.com/reviews/g-pen-pro-review/): The G Pen Pro is a cheap, small, genuinely easy dry herb pen with one button and three temperatures, and a silicone mouthpiece that takes over the flavour after the first draw of a session. We scored it four out of five, and the missing point is that mouthpiece.
- [Hemp Bombs review: the batch code is on the pack](https://www.hailmaryjane.com/reviews/hemp-bombs-review/): Hemp Bombs publishes a certificate for every batch and prints both a batch number and a scannable code on the packaging that lead to it. Being able to look up the report for the container in your hand is the single check most brands in this category fail, and this one is built for it.
- [Hemper box review: the monthly bong](https://www.hailmaryjane.com/reviews/hemper-box-review/): Hemper sells one idea in two sizes: a themed piece of glass every month, with smoking consumables packed around it. The old build-your-own tiers are gone. You do not see what is coming before it arrives, and whether that is the appeal or the problem is the only question worth answering.
- [Ignite CBD review: what independent testing found](https://www.hailmaryjane.com/reviews/ignite-cbd-review/): Independent testers bought an Ignite vape pod labelled as 150 mg of CBD and measured 188.9 mg — about 26 per cent over the label, well outside the ten per cent variance most consider acceptable. The same testers reported being unable to obtain the certificate for the batch they had bought.
- [PAX 3 review: the conduction trade](https://www.hailmaryjane.com/reviews/pax-3-review/): The PAX 3 is the most durable portable dry herb vaporizer most people will own, and it heats by conduction, which is the compromise everything else on it is built around. The oven tops out at 215C, so the concentrate insert it ships with was never going to work properly.
- [Select CBD review: the pens, and a dead padlock](https://www.hailmaryjane.com/reviews/select-cbd-review/): Select CBD is best known for vape pens blending CBD with essential oils. When we checked in September 2026 the brand site did not load securely — an expired certificate — which is a problem in its own right and makes verifying anything else about the range difficult.

## Blog

- [Buying a gift for someone who smokes](https://www.hailmaryjane.com/blog/best-gifts-for-potheads-on-420/): Most gift guides for smokers are a list of novelties nobody uses twice. This one is built the other way round: six categories where a good version is meaningfully better than a cheap one, and the specification to check in each.
- [Cannabis tea, and why most recipes fail](https://www.hailmaryjane.com/blog/weed-tea-recipes-and-best-brands/): Most cannabis tea recipes leave out the two steps that make the difference: heat the material first, and put fat in the cup. Water alone will not carry cannabinoids, which is why a mug of steeped stems tastes of cannabis and does nothing else.
- [Cottonmouth, and why water alone fails](https://www.hailmaryjane.com/blog/best-ways-to-get-rid/): The dry mouth that follows cannabis is not a fluid problem, which is why water disappoints. It is reduced saliva, and the things that help are the ones that get saliva moving rather than the ones that add liquid.
- [Every way to consume it, and what each does](https://www.hailmaryjane.com/blog/10-best-ways-to-smoke-your/): The method decides more than the material does. Burning, heating and eating put the same flower through three completely different processes, and the numbers behind that are published rather than folklore.
- [Games worth playing while you smoke](https://www.hailmaryjane.com/blog/smoking-games-to-get-you-lit/): Half the smoking games on the internet are competitive overconsumption with a name attached. These are the other half: games that are actually games, where the smoking is incidental and nobody wins by getting through the most.
- [How much kief to use, and why](https://www.hailmaryjane.com/blog/how-much-kief-to-use/): Kief is the resin knocked off flower, and California classes it as a concentrate rather than as flower. That is the reason the amounts are small. Here is the ratio that governs all nine common uses, and where it stops applying.
- [Shaped joints, and how they actually roll](https://www.hailmaryjane.com/blog/cool-joints-and-crazy-blunts/): Cross joints, braids, tulips and the rest are novelty objects that still have to draw air and burn evenly. Most of them do neither by accident. Here is how each shape is actually built, and which are worth the flower.
- [Transdermal patches, and what they are not](https://www.hailmaryjane.com/blog/transdermal-cannabis-patches/): Transdermal and topical are two different things sold beside each other. One is designed to cross the skin and one is designed not to. What a patch is, how the format works, and how little of it is settled.
- [Water curing weed, and what it removes](https://www.hailmaryjane.com/blog/water-curing-your-weed/): Water curing soaks harvested cannabis for days to pull out everything water can dissolve. The percentage on a label goes up, which is not the same as getting more, and the smell goes entirely. It is a technique with one real use and one real risk.
- [Weed humidors and the one number that matters](https://www.hailmaryjane.com/blog/weed-humidor/): Every jar of legal flower passed a water activity test on its way to the shelf, and nothing tests it again afterwards. That is the entire case for storing weed properly, and it is a better case than the one usually made for it.
- [What actually changed in cannabis testing](https://www.hailmaryjane.com/blog/what-changed-in-cannabis-this-year/): Lab testing is the part of legal cannabis that changed most and gets explained least. Here is what a certificate actually covers, what it leaves out, and the one number on it that decides whether a batch reaches a shelf at all.
- [Working in cannabis, and the permit first](https://www.hailmaryjane.com/blog/cannabis-jobs-all-you-need/): Every guide to cannabis jobs lists the roles and skips the gate. In most licensed states you cannot legally work for a licensee without a state-issued worker permit, and that comes before the application, not after the offer.