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NATURAL OR CONCENTRATE?

Solvent vs Non-solvent Extraction

The first question to be addressed is: What’s the difference between solvent extracts and traditional hash? Well, aside from appearance, the biggest difference is the process involved in making them. While traditional hash is made using sieves (wet or dry) to separate the material from the plant, extract hash is made by “blasting” a chemical solvent (i.e., butane, CO2) through the plant matter, then “purging” the solvent away. 

“You’re getting a lot of extra goodies that come out in those solvent extracts,” observes Bob Melamede, Ph.D. An associate professor of biology at the University of Colorado and the president/CEO of Cannabis Science Inc., Dr. Melamede is one of the world’s few experts on the human endocannabinoid system. “Aside from the oils, there are all sorts of compounds that come out that probably have beneficial value,” he says. “We've got indications that there are differences in the effects, pain relief properties and potentially other important phenomena. We don’t really know at this point ... all we know is that this plant is quite the magical chemistry set.”

It’s also widely believed that BHO boasts a higher concentration of THC and is therefore much stronger than traditional hashish. But is this really true? As the cannabis critic for Denver’s Westword alt-newspaper, William Breathes is paid to sample and review a wide array of cannabis products – and according to his experience, it is stronger. “When you look at the percentage of cannabinoids per weight, it seems you’re pulling out more THC with butane than with ice water,” he says.

But there are those who disagree – such as Selecta Nikka T, owner and operator of Colorado’s Essential Extracts. “It’s such a new phenomenon that we really don’t have enough data to show that BHO is getting higher test results than water extraction of the same strain, or if there are any dangers to it,” he asserts. “I prefer the solvent-less method, because we can retain terpenes a lot better than most solvents, and I don’t have to worry about anything being left over in my product.”

Another of Denver’s extraction experts is Daniel “Big D” , a partner at Top Shelf Extracts, who isn't quite as skeptical. “I’m a 100 percent proponent of BHO, because I've seen it make people’s pain just evaporate,” he states. “As medicine, it helps with both harm reduction – it practically cures withdrawal symptoms in people who are alcoholics or addicted to speed or pharmaceuticals – and pain management. It works every single time, and it’s easier to regulate your dosage. You take a fraction of a percent of a gram, and you’re fully medicated and exactly where you want to be.”

So which is better, butane or solvent-less? Until more analysis is done comparing the chemical composition of the plant material to the solvent extracts, we won’t know the real differences. But according to Amarimed of Colorado’s Alan Shackelford, MD, it’s not really a matter of “better” or “worse” – just what suits a patient’s individual needs and preferences.

“There isn't necessarily one method that’s superior to another,” he explains. “Concentrates can be provided in a variety of ways ... different options for different conditions that vary from person to person, as it should be.”