Live Resin vs. Live Rosin vs. Distillate: How They're Made and Labeled

Walk through the concentrates section of any Massachusetts menu and you'll see three terms over and over: live resin, live rosin and distillate. They can look similar in a vape cartridge. They're made in very different ways, and each one keeps a different share of the original plant.

Here's how each is made, what the words on the label mean, and how the state tests and labels concentrates. This guide is for adults 21 and over.

Key takeaways

• "Live" means the extract was made from fresh-frozen plants instead of dried and cured flower.
• Live resin uses a solvent, usually a hydrocarbon, which is purged afterward. Live rosin is solventless and made with ice water, heat and pressure.
• Distillate is refined to isolate cannabinoids. Most of the original terpenes are removed and often added back later.
• Massachusetts concentrate labels must state the processing technique and any solvents used. Vape labels must say where the terpenes came from.
• Solvent-made products are tested for residual solvents, and the most hazardous solvents are banned.

First, what "live" means

Most cannabis is harvested, dried and cured before anything else happens. That process changes the plant's chemistry. Some of the more volatile aromatic compounds evaporate or break down along the way.

"Live" products skip the drying and curing. The plants are frozen right after harvest and extracted while still frozen. The goal is to keep more of the aroma and flavor of the living plant. That's the whole point of the "live" label. It describes the starting material, not the extraction method.

Live resin

How it's made: Fresh-frozen cannabis is washed with a solvent in closed-loop equipment. The solvent is usually a hydrocarbon such as butane or propane. The solvent dissolves the resin, which contains cannabinoids and terpenes. It's then separated and purged from the extract, typically with heat and vacuum.

What you get: An aromatic concentrate. Depending on how it's finished, it can come as a sauce, badder, sugar or diamonds. It's also used in vape cartridges.

Keep in mind: Because it uses solvents, live resin falls under Massachusetts residual solvent testing (more below).

Live rosin

How it's made: Live rosin is solventless. The usual process has two steps:

1. Ice water hash. Fresh-frozen plant material is agitated in ice water. Cold makes the resin glands (trichomes) brittle, so they break off. The glands are then collected through a series of mesh bags and dried. The Commission's testing protocol describes this kind of product, "bubble hash," as resin glands extracted "using cold water and physical separation."
2. Pressing. The dried hash is pressed between heated plates, which squeezes out the oil. That oil is rosin.

What you get: A concentrate that typically comes as a jam, badder or cold-cure texture, and that's increasingly used in solventless vapes.

Keep in mind: No chemical solvents are involved. Under the Commission's protocol, a concentrate made with a solvent-free process doesn't require a residual solvent screen.

A quick word on "resin" vs. "rosin"

The names are one letter apart and easy to mix up. The simplest way to remember it: resin = solvent; rosin = pressed. Either can be "live" if it starts from fresh-frozen material. (Non-live rosin pressed from dried flower or cured hash also exists.)

Distillate

How it's made: Distillate starts as a crude cannabis extract, often made with ethanol or a hydrocarbon. It's then refined. It's winterized to remove fats and waxes, and then distilled: the oil is heated under vacuum so compounds separate by boiling point. What's left is mostly cannabinoids, usually a single dominant one such as THC.

What you get: A clear or pale gold oil with very little aroma of its own. Distillate is the most common base for vape cartridges and many edibles, because it's consistent and easy to measure.

Keep in mind: Distillation strips out most of the plant's original terpenes. Many distillate vapes add terpenes back afterward, either cannabis-derived or from other botanical sources. That's why the Massachusetts vape terpene statements matter (see below).

Side by side

How Massachusetts labels concentrates

Under 935 CMR 500.105(5)(c), every concentrate or extract label must include, among other things:

• Product identity, including the word "concentrate" or "extract."
• The processing technique and any solvents used. This is where you'll see "solventless," "hydrocarbon extraction," "CO₂" or similar.
• The full cannabinoid profile, per package and per serving if applicable, in absolute terms and as a percentage.
• Additives such as thickening agents, thinning agents and specific terpenes, with amounts.
• A creation date and a "use by" or expiration date.
• A batch number.
• The tested-for-contaminants statement and seal, with the date of testing.

Extra rules for vapes

Vape labels must also carry one of two statements:

• "This product was produced using only cannabis-derived terpenes." or
• "This product was produced using terpenes derived from sources other than cannabis."

Vape additives must be identified, including those on the FDA's Inactive Ingredient Database for inhalation. The Commission's testing protocol also calls for a written insert at the point of sale. The insert identifies the device manufacturer, its components including the battery, and the materials in the atomizer coil.

How concentrates are tested

All concentrates sold to consumers go through independent lab testing before sale. For concentrates specifically:

• Cannabinoid profile.
• Microbial contaminants and mycotoxins for concentrates sold directly to consumers.
• Heavy metals.
• Residual solvents if any solvent was used. Only solvents on the Commission's approved list may be used. The most hazardous "Class 1" solvents, including benzene, are banned outright.
• Vitamin E acetate, plus heavy metals, for finished vape products.

Pesticides are screened on the plant material the concentrate is made from. For a full walkthrough, read how to read a cannabis certificate of analysis.

Which one should you choose?

That comes down to preference, and we won't pretend one is objectively best. Some practical points:

• If aroma and flavor matter most to you, look at live resin and live rosin. Check the terpene results on the lab summary (see our terpenes guide).
• If you care about solventless, look for live rosin or ice water hash. Check that the label says solventless.
• If you want consistency, distillate products are highly uniform. Check whether the terpenes are cannabis-derived.
• Concentrates are potent. Percentages are often far higher than flower. Start low, go slow. See THC percentage explained.

Shop concentrates and vapes

Each product page shows the lab summary tied to its METRC package tag when available, including potency, contaminant results and the test date. Our lab results page explains every field.

Browse the menu: concentrates and vapes, delivered to Back Bay, Allston, Natick and across our delivery area. Adults 21+ only.

For use only by adults 21 years of age or older. Keep out of the reach of children. This article is general information, not medical advice.