Dos And Don’ts of Vegetable Glycerin
Vegetable glycerin is a sweet, thick liquid that is popular in a variety of foods and often used in cannabis tincture making. Because it is pleasant tasting and doesn’t burn when you swallow it or put it under your tongue, many people prefer a tincture that has vegetable glycerin as a base instead of alcohol.
Here’s the catch – VG might taste great, but since it doesn’t contain fat or alcohol, it is not an effective infusion medium.
In other words, the VG does not do a good job of pulling the THC, CBD, CBG or other cannabinoids from the plant material.
As a result, you don’t want to use VG as your infusion/extraction solvent.
In fact, compared to alcohol and oil-based solvents, which can extract over 90% of cannabinoids from the plant, VG only pulls out less than 10%! That means if you are trying to extract cannabinoids from the activated flower into VG, you are missing out on over 85% of the available THC and will end up with very few of the cannabinoids in the final tincture. So don’t expect a strong tincture if you use VG as a solvent for your extractions.
You can see in the example above, using 19.8% THC decarbed flower (198 mg per gram), the vegetable glycerin (VG) was only able to extract 11 mgs of the 198 mgs available. See the detailed test results here:
- 1 gram decarbed flower using the Nova
- 1 gram of decarbed flower infused into 1 ounce VG in the Nova
So why is VG so popular, and how do you use it the right way?
VG is popular because it is mild tasting and doesn’t burn your mouth when you hold it under your tongue or swallow. This makes it ideal to use as a mixing ingredient with alcohol-based extractions or with decarbed concentrates in order to make a tincture that tastes better and doesn’t burn when administered.
Using Glyceric To Soften Alcohol Extractions
You can do an alcohol extraction with Everclear, which is a quick and easy process. Just decarb your flower, add Everclear and the decarbed flower into a jar and shake.
Let the Everclear and decarbed flower mixture sit for an hour or so and then strain. You’ll have an active alcohol tincture that has extracted most of the THC or CBD from the plant, because alcohol is a very effective solvent. But again, this tincture will be very overwhelming taken directly, with a stinging and unpleasant taste that can also lead to alcohol intoxication if you drink too much.
In order to make an alcohol extraction taste more smooth and contain less alcohol, VG can be mixed in to lower the alcohol content and make the tincture taste better. You could also let your alcohol mixture stay out overnight to allow the alcohol to evaporate and then add the VG. The more alcohol you let evaporate, the more concentrated and potent the extraction will become. You can mix that concentrate with the VG to make a very smooth and more potent tincture.
Using Glycerin To Make Tinctures With Concentrates
If you are starting out with a concentrated form of cannabis like wax, shatter or rosin from the beginning, VG can also come in handy to transform the concentrate into a tincture. After you decarboxylate your concentrate, you can mix the decarbed concentrate with the VG in order to create a custom tincture. Make sure that you are mixing the ingredients warm so they can blend well for a consistent dose. Adding a small amount of coconut oil to the decarbed concentrate before mixing with the VG can help with blending.
Decarbing and blending concentrates is an easy way to make potent tinctures.
As long as you remember that VG is not a good vehilce for infusing with flower (it does a poor job of extracting the THC or CBD from the flower) but is a good option for mixing to make a tincture with an alcohol extraction or a cannabis concentrate, you’ll do just fine.
Dos And Don’ts of Vegetable Glycerin Vegetable glycerin is a sweet, thick liquid that is popular in a variety of foods and often used in cannabis tincture making. Because it is pleasant tasting
Cannabis, meet Glycerin…
Cannabis, meet Glycerin…
Glycerin is a sweet syrup-like substance that is chemically related to alcohol. It is a by-product of soap and candle manufacture, where fats and oils are broken down into glycerin and fatty acids by the use of high pressure steam. It is colorless, odorless, viscous and of low toxicity. It is 60% as sweet as table sugar (sucrose) with a comparable caloric density. It is absorbed in the human body at a rate 30% slower than sucrose and thus has a lower glycemic index. Three common bases of glycerin are animal fats, soybean oil and coconut oil. We are currently using an organic, non-gmo soybean derived product to manufacture our glycerin tinctures (also referred to as glycerites). The primary advantage of making tinctures with glycerin is to avoid using alcohol so that people with alcohol sensitivities can have access to these forms of extracts. Alcohol is generally regarded as both a superior solvent and preservative when compared to glycerin. Some studies report that glycerin has the capability of only holding 33% the amount of cannabis oil that alcohol can. Thus, it is widely recommended that doses be increased when using glycerites as opposed to alcohol tinctures in order to receive a comparable effect. However, due to the different chemical reactions that are inherent in the two solvents (the way that these solvents break apart the plant material to access their components, or “information” as we like to refer to phyto-chemicals and nutrients), others argue that glycerin actually delivers a more potent extract because it preserves the protein structures of the information that is sought after in the botanical being extracted. Glycerin may capture less information, but the information that it does glean is complete. Alcohol, conversely, has the potential to denature botanical constituents, rendering them inert, because our bodies can no longer “read” or access the information. We believe that both solvents have their place and that their benefits are registered differently in each individual. A glycerin tincture can be just as powerful as an alcohol tincture, at the right time, for the right person, in the right dose. As with any first time experience with one of our products, we recommend that you begin with low doses so that you may register your own individual response to the medication. With this information, you can have the confidence to build your own process of self medication. Stored properly, in containers tightly sealed in low light environments, glycerin tinctures have an approximate 1 year shelf life.
There are two ways that glycerin tinctures can be prepared, the hot and the cold extraction methods. The cold method takes months (3-12 for best outcomes) to complete and results in a more floral, aromatic product as the terpenes in the cannabis are not dispersed by the application of heat. A cold method extract is made simply by combining cannabis flowers with the glycerin and letting it soak in an airtight container stored in a cool, dark place. The container is agitated daily in order to encourage the extraction process. After a set period of time (best after 60 days), the glycerite is strained and the process begun again with fresh flowers using the glycerin extract that was just created. This layering is a process of potentization. Beautifully aromatic, tasty and effective tinctures are made this way. We are experimenting with extended periods of saturation to learn more about how this effects potency, flavor and aroma. After the final saturation, the glycerite can be gently heated to enable decarboxylation. We keep temperatures below 180F as this preserves the most terpenes while slowly decarboxylating the THC, preventing it from degrading to CBN. Our first cold extraction glycerin tincture will be available the week of the Summer Solstice in 2014.
The hot extraction method produces an effective tincture in a matter of days as heat is used to accelerate the transfer of cannabinoids. This glycerite has more of a toasted flavor as the terpene content of the cannabis is diminished during the cooking process. Temperatures are once again kept under 180F in order to keep this loss to a minimum. This method requires a long and low method of cooking with repeated stirring in order to encourage the extraction process. The glycerin and cannabis are combined in a glass jar and placed in a hot oil bath. We prefer oil because it does not evaporate during the process as water does, a concern due to the time involved. The temperature of the glycerite is gently raised and lowered several times over a 24 hour period. The length of this process is determined by preference concerning potency and flavor. Longer cook times create a more robust tasting tincture, but run the risk of passing by peak decarboxylation, the point at which maximum THC content begins to fade into CBN production. Particular attention is paid to the variances that occur in decarboxylation based on strain. We have noticed throughout our extensive decarb experiences that each strain reacts differently to temperature and time. We utilize your senses to gauge the effectiveness of the decarb process. Sometimes this is just as effective as the hard data that can be received from a lab. The color, scent, taste and texture of the cannabis during the decarb process gives us obvious clues about where we are on the spectrum. When the hot extraction method has been completed to our satisfaction, the glycerite is left to cool and rest. The plant material settles to the bottom of the jar so that the final product can be easily poured off to strain.
CVD’s first heat extracted glycerin tincture is now available. It can be consumed on its own, sublingually, as you would an alcohol or olive oil extract. It is also a great addition to our Companion Botanical Tea Blends. One dropper will add delicious flavor and sweetness while also aiding the medicinal effect.
Read more about Cannabis, meet Glycerin… at cvdvt.org