A glycerin tincture, often called a glycerite, uses food-grade vegetable glycerin instead of alcohol to extract beneficial compounds from herbs. The standard approach is simple: combine a 75% glycerin and 25% water mixture with dried herbs at a 2:1 liquid-to-herb ratio, then let it sit for 4 to 6 weeks. Glycerites are a practical choice for anyone avoiding alcohol, making remedies for children, or working with herbs whose key compounds dissolve well in glycerin.
Why Glycerin Works as a Solvent
Glycerin is a thick, sweet liquid derived from plant fats through steam processing. It dissolves a narrower range of plant compounds than alcohol does, but for certain classes of compounds it actually performs surprisingly well. A study published in Antioxidants found that glycerol-water mixtures extracted higher concentrations of polyphenols, flavonoids, and chlorophyll from peppermint and nettle leaves compared to both pure water and pure ethanol. That means for many common herbs, especially leafy ones rich in antioxidants, glycerin is not just a compromise. It can be the better choice.
Where glycerin falls short is with resinous compounds, essential oils, and some alkaloids that require high-proof alcohol to dissolve. If you’re working with herbs valued primarily for those compounds (like myrrh resin or goldenseal root), an alcohol tincture will be more effective. But for everyday herbs like chamomile, lemon balm, peppermint, elderberry, or echinacea, glycerin pulls out plenty of useful material.
Choosing Your Glycerin
Look for vegetable glycerin labeled “USP grade,” which means it meets purity and safety standards set by the United States Pharmacopeia. USP-grade glycerin is made by steam hydrolysis of plant-based fats, contains no solvents or hexane, and is free of artificial additives. It’s widely available online and in health food stores. You’ll also see it labeled as food-grade or kosher, both of which are fine for tincture making. Avoid glycerin sold for industrial or cosmetic use, which may not meet the same purity standards.
Cold Maceration Method (4 to 6 Weeks)
Cold maceration is the most common approach and requires no special equipment. The long soak time allows the glycerin to slowly pull compounds out of the plant material at room temperature.
What You Need
- USP-grade vegetable glycerin
- Distilled water
- Dried herbs (cut and sifted works better than whole leaves or roots)
- A clean glass jar with a tight-fitting lid (mason jars work well)
- A fine mesh strainer, cheesecloth, or both
- Dark glass bottles for storage
Step by Step
Start by making your menstruum, which is just the liquid solvent. Mix 3 parts glycerin with 1 part distilled water by volume. So for a small batch, that might be 3/4 cup glycerin and 1/4 cup water. The water is important: pure glycerin is extremely thick and doesn’t penetrate plant material efficiently on its own. The 75/25 blend is thin enough to circulate through the herbs while still containing enough glycerin to preserve the final product and extract compounds effectively.
Weigh out your dried herbs and use a 1:2 ratio of herb to menstruum by weight-to-volume. For example, 1 ounce of dried herb to 2 fluid ounces of the glycerin-water mixture. Place the herbs in your jar, pour the menstruum over them, and stir well. The liquid should cover the plant material by at least an inch. If herbs float above the surface, they can develop mold, so press them down or add more menstruum.
Seal the jar tightly and store it at room temperature, ideally between 65°F and 75°F (about 20 to 25°C). Shake the jar once or twice daily for 4 to 6 weeks. The shaking redistributes the plant material and helps the glycerin reach fresh surfaces. You’ll notice the liquid gradually darkening as compounds move into solution. After 4 to 6 weeks, your glycerite is ready to strain.
Heat-Assisted Method (1 to 3 Days)
If you don’t want to wait a month, gentle heat speeds up extraction dramatically. Research on heat-assisted extraction shows that temperatures around 65 to 70°C (roughly 150°F) can pull compounds from plant material in hours rather than weeks. For home glycerite making, a slow cooker on its lowest setting or a water bath on the stovetop works well.
Combine your herbs and menstruum in the same 1:2 ratio. Place the jar (without the lid fully sealed, to allow pressure release) in a slow cooker filled with a few inches of water. Set it to the “warm” or lowest setting and let it go for 24 to 72 hours. Check the water level periodically and stir the tincture once or twice a day. The target temperature inside the jar is around 150°F. If your slow cooker runs hotter than that, prop the lid open slightly or cycle it on and off.
This method works especially well for tough plant material like roots and bark, which need more energy to release their compounds. For delicate flowers and soft leaves, the cold method is gentler and less likely to break down heat-sensitive compounds.
Using Fresh Herbs Instead of Dried
Fresh herbs contain 70% to 85% water by weight. That moisture dilutes your menstruum, which changes the final glycerin concentration and can affect both extraction power and shelf stability. To compensate, skip the added distilled water entirely and use undiluted glycerin. The water content of the fresh plant material provides the dilution naturally.
Use a 1:2 ratio of fresh herb to pure glycerin by weight-to-volume. Chop or bruise the herbs first to expose more surface area. Fresh herb glycerites tend to have a shorter shelf life than dried-herb versions because the final glycerin percentage is less predictable, so refrigerating the finished product is a good idea.
Straining and Filtering
Glycerin is significantly thicker than alcohol, which makes straining a glycerite slower and messier than filtering a standard tincture. Start by pouring the mixture through a fine mesh strainer to catch the bulk of the plant material. Then strain a second time through several layers of cheesecloth or unbleached muslin, squeezing firmly to extract as much liquid as possible from the spent herbs. You’ll lose some product in the plant material no matter what, so starting with slightly more menstruum than you think you need helps.
If the tincture still looks cloudy after double straining, you can let it settle for a day or two and then carefully pour off the clear liquid, leaving the sediment behind. For a truly clear product, a coffee filter works but takes patience since glycerin drips through very slowly. Applying gentle pressure or using a funnel lined with a paper filter speeds this up somewhat.
Storage and Shelf Life
Pour the finished glycerite into dark glass bottles, preferably amber or cobalt blue. Light breaks down many of the beneficial compounds you just spent weeks extracting. Store the bottles in the refrigerator for maximum longevity. At refrigerator temperatures and protected from light, a properly made glycerite with a final glycerin concentration of at least 55% to 60% will resist microbial growth and remain stable for 1 to 2 years. At room temperature, expect a shorter useful life of roughly 6 to 14 months.
Glycerin itself is a mild preservative, but it’s not as effective as high-proof alcohol at preventing spoilage. If you ever notice off smells, cloudiness that wasn’t there before, or any sign of mold, discard the tincture. Keeping your jars, straining tools, and storage bottles scrupulously clean from the start is the single most effective way to ensure a long shelf life.
Dosing Basics
A typical adult dose for most glycerites is 1 to 2 milliliters (roughly 30 to 60 drops) taken two to three times daily, either directly under the tongue or mixed into a small amount of water or juice. Glycerin has a naturally sweet taste, which makes glycerites far more palatable than alcohol-based tinctures. This is one of the main reasons people choose them for children, though dosing for children is typically reduced by half or more depending on age and body weight. The sweetness also makes glycerites easy to add to tea or smoothies without altering the flavor much.
Keep in mind that because glycerin extracts a narrower spectrum of compounds than alcohol, glycerites are generally considered less potent drop-for-drop. Some herbalists compensate by using a higher herb-to-menstruum ratio (1:1 instead of 1:2) or by extending the maceration time to 8 weeks. Either approach increases the concentration of extracted compounds in the final product.