Concentrate Shelf Life: How Long Does Cannabis Oil Last?

Article by Patrick Bennett, Leafly

Concentrate Shelf Life: How Long Does Cannabis Oil Last?

Finding a long-lost cannabis concentrate is a bittersweet moment. Your discovered concentrate was left stranded in a pair of jeans that had been stuffed in the far reaches of your dresser, untouched since that last camping trip. For about a year, it’s been sitting in between some parchment paper, waiting for you to unearth it.

The good news: no mold. The bad news: it doesn’t look like the translucent and golden “shatter” you once had. What’s before you now looks like a collection of off-yellow sugar crystals. Has this hash oil gone past its shelf life? Can you still enjoy it?

How long a cannabis concentrate lasts depends on a number of factors ranging from the quality and classification of the starting material used to the packaging and storage of the final product. While some extracts and infusions can experience quality degradation in a very short time span, others may stay fresh and useable indefinitely.

The Impact of Extraction Method on Concentrates

The golden standard in any extraction methodology is that the quality of the end product will always reflect the quality of the starting material. “Gold in, gold out; Garbage in, garbage out.” There’s a direct correlation between the quality of the starting material and what remains post-extraction. Inferior products containing compromised cannabinoid profiles will, in every case, result in an inferior extract.

Terpenes will almost always experience degradation of some kind during extraction. The loss will not only affect the flavor and medical efficacy of the final product, it could play a role in that product’s shelf life as well. Some products, such as those purposed for dabbing, utilize extraction methods intended for terpene preservation. Extractions meant for infusions such as for ediblestopicals, and tinctures  however, may not necessarily need to utilize these terpene preservation methods.

Concentrates come in a variety of forms, ranging from extracts like saps, shatters, crumbles, butters, and distillates to sifted mechanical varieties like kief, ice water extract (IWE), and dry sift. Their attributes, such as consistency, viscosity, and clarity, are all byproducts of their extraction method.

The basic principle of an extraction is to remove the many impurities from the starting material, which include plant matter, fats and lipids, and other foreign contaminants. Many fats and lipids in solventless concentrates remain because they are more difficult to mechanically remove.

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