Best RSO Oil Brands in 2026: Our Top Picks

If you’ve ever compared RSO oils, you know how similar they can look. Most come in a syringe filled with thick, dark oil, often with a high THC percentage printed right on the label. That can make it hard to tell a great RSO from one that’s just strong.

Look beyond potency, though, and the differences become clearer. The best brands have their own approach to RSO, whether they stay true to the old-school extract or put their own spin on it. We took a closer look at the top RSO oil brands in 2026 to find out which ones are worth buying and why.

Best RSO Oil Brands at a Glance

7 Best RSO Oil Brands in 2026

Whether you’ve been buying RSO for years or are picking out your first syringe, these are seven brands worth knowing.

1. RickSimpsonOil.com – Best Overall

RSO is right there in the name, and RickSimpsonOil.com has made the extract its specialty. We sell authentic, high-THC, full-spectrum RSO made from cannabis sativa and third-party tested for potency and purity.

We’ve had customers try several different RSO oils before settling on ours and becoming repeat buyers. For us, that’s one of the best signs that we’re getting the important things right.

Each syringe contains 1 gram, but you don’t have to buy them one at a time. Packs come with 5, 10, 15, 20, or 30 grams total, and the price per gram drops with larger orders. You can try a single syringe first or stock up if RSO is already part of your routine.

RickSimpsonOil.com also reaches far beyond a single state’s dispensary market. Customers can order online throughout the U.S., with international shipping available where permitted. Packages are discreet and insured, and the oil can even be shipped in a glass tincture bottle when syringes could cause problems at customs.

RickSimpsonOil.com focuses entirely on RSO. In addition to the oil, we offer RSO gummies, capsules, tinctures, topicals, and other products, plus guides that get into the specifics of dosing, storage, and using the thick oil.

Whether you’re trying RSO for the first time or use it regularly, we give you more ways to buy it, and more help using it, than most brands we looked at. That’s why it’s our best overall pick for 2026.

2. Emerald Bay Extracts – Best Strain Selection

If you like choosing your cannabis by strain, Emerald Bay Extracts gives you a lot more to work with than the typical RSO syringe. Its 1-gram lineup includes Blue Dream, Sour Diesel, OG Kush, Wedding Cake, and dozens of others, along with CBD, CBG, and 1:1 options. Its Blue Dream RSO has some hardware to its name, too, taking first place at the 2024 Farmers Cup.

Emerald Bay was founded by a Stanford oncology nurse with 20 years of bedside experience and makes its RSO in small batches in Nevada City, California, using cannabis from family farms. Nothing extra goes into the full-spectrum oil, and every batch is tested three times for potency and purity, with a COA you can check yourself.

The biggest catch is where you can get it. Emerald Bay’s syringes are currently limited to California, although you’ll find the brand in more than 500 licensed dispensaries across the state. New Mexico has its RSO tablets for now, with syringes expected to follow.

3. Nature’s Heritage – Best Traditional RSO

Nature’s Heritage keeps its RSO pretty old-school. The 1-gram syringe contains full-spectrum oil extracted with ethanol, with the thick, dark, molasses-like appearance you’d expect from traditional RSO. Chlorophyll, terpenes, fats, and waxes from the cannabis remain in the finished oil, too.

Nature’s Heritage is known for its cannabis genetics and small-batch cultivation, with products ranging from flower to concentrates and vapes. Its RSO lineup is much smaller. There’s the 1-gram syringe, along with RSO capsules in 5-, 25-, and 100-milligram strengths if you’d rather have the dose measured out for you.

Finding the syringe may be the harder part. Nature’s Heritage sells cannabis in four states, but its RSO oil is currently listed in Massachusetts and Maryland. If you’re in either market and prefer the thick, dark style of RSO that’s been around for years, Nature’s Heritage is a solid one to know.

4. 710 Labs – Best for Cannabis Genetics

710 Labs has been making cannabis concentrates since 2010, and the company takes its genetics pretty seriously. It hunts through different phenotypes to find the ones worth keeping, and that interest in individual cultivars extends to its RSO.

Rather than mixing cultivars together, 710 Labs keeps its full-spectrum RSO cultivar-specific. That means the cannabinoids, terpenes, and other compounds in the oil all come from the same cultivar. The oil is also fully decarboxylated, so it’s ready to use straight from the syringe.

The exact RSO you find will depend on where you live. 710 Labs currently operates in California, Colorado, Michigan, Florida, and New Jersey, but its RSO selection varies by market. The rotating genetics can make tracking down a favorite harder, but they also give you the chance to try RSO made from different cultivars.

If you pay attention to strain when buying flower or concentrates and want to do the same with RSO, 710 Labs gives you that option.

5. Doctor Solomon’s – Best for Cannabinoid Options

Not everyone shopping for RSO wants as much THC as possible. Doctor Solomon’s gives you four choices: THC Rich Sativa and THC Rich Indica, plus a 1:1 CBD:THC syringe and a CBD Rich version. It’s a nice change if the usual high-THC RSO isn’t what you’re looking for.

Doctor Solomon’s also starts with premium cannabis flower rather than trim. The flower is flash-frozen, extracted in sub-zero ethanol, and then filtered before the remaining ethanol is removed. The oil is decarboxylated and ready to use, and the company says the process follows Rick Simpson’s published method with laboratory-grade quality control.

There’s some family history behind the Doctor Solomon’s name. Sisters Laura and Rebecca founded the company in 2016 and named it after their mother, Dr. Diane Solomon, a physician and scientist whose research helped shape cervical cancer screening guidelines. Products are tested throughout production for potency, pesticides, and microbial contamination.

Doctor Solomon’s RSO is sold through licensed dispensaries in several states, with the four options varying by location.

6. Grassroots – Best Versatile RSO

Most RSO is meant to be eaten, but Grassroots gives you another option. Its 1-gram full-spectrum RSO uses a special hydrocarbon extraction process that allows the oil to be vaporized, too. You can still take it directly or add it to food or a drink, but Grassroots says its RSO can also go in a dab rig or dab pen.

There’s more than one RSO to choose from, too. Grassroots makes both Full Spectrum RSO and strain-specific syringes, with strains such as Ray Charles and Novarine showing up in dispensaries. The selection changes depending on where you shop, but that variety has earned the brand quite a few fans among RSO users.

Grassroots itself started in a small house on Chicago’s North Side, where its founders experimented with craft strains and cannabis genetics. Today, the lineup is much bigger, spanning flower, pre-rolls, concentrates, and RSO.

If you want an RSO syringe that isn’t limited to oral use, Grassroots gives you an option most RSO brands don’t.

7. Texas Original – Best Texas RSO

Texas Original takes the local part seriously. The company bred its own Texas OG strain by crossing Godfather OG with Purple Chemrich, grows it in Texas, and uses it to make its 0.5-gram RSO syringe. There’s only one ingredient in the syringe, full-spectrum cannabis extract, with about 410 to 412 milligrams of THC.

Texas Original also calls this the first medical cannabis oral syringe in Texas. RSO has since made its way into more of the company’s products, including a 900-milligram tincture, gummies, and dark chocolate bites. Every production batch is tested, with the full COA posted online.

This one is only for Texans enrolled in the state’s Compassionate Use Program. Patients can pick up their orders at locations around the state or have them delivered, depending on where they live.

If you’re in Texas and qualify for medical cannabis, Texas Original gives you an RSO that really is homegrown, from its own Texas OG genetics to the cannabis grown right here in the state.

How We Chose the Best RSO Oil Brands

There’s no single thing that makes an RSO oil the best, so we looked at the bigger picture when comparing brands. Here’s what factored into our picks:

• RSO quality: It starts with the oil itself, including how it’s made and the quality and consistency you can expect from the brand.
• Selection: Some brands give you more room to choose, with different strains, cannabinoid profiles, or amounts available. We’ve learned from customers that some want very specific options, while others are happy once they find an RSO they like.
• Lab testing: Testing is important, but those results shouldn’t be hard to track down. We looked for brands that are transparent about what’s in their RSO.
• Availability: We considered how easy each RSO is to find, since we’ve heard from customers who switched to us after struggling to reliably find the same oil elsewhere.
• Price: We compared prices with the amount and quality of RSO you’re getting, rather than favoring the lowest price.
• Customer feedback: Reviews and RSO communities gave us another perspective on each brand, particularly when the same experiences came up repeatedly.

Conclusion: What Is the Best RSO Oil Brand?

There are some excellent RSO brands out there, and each one on this list brings something different to the syringe. But for the best overall, we chose RickSimpsonOil.com. RSO is our specialty, with high-THC, full-spectrum oil available in quantities from 1 to 30 grams, third-party testing, and worldwide shipping.

If you want to see what’s available, shop our RSO oil or browse our RSO guides to learn more before you order.

Best RSO Oil: Frequently Asked Questions

Here’s what else you should know when comparing the best RSO oils.

What RSO Oil Is Best for Pain?

There isn’t one RSO oil proven to be best for pain. Some research suggests THC-containing cannabis products may provide modest short-term relief for certain types of chronic pain, but there isn’t enough evidence to recommend a specific RSO brand, strain, or cannabinoid ratio. If you use RSO for pain, choose a lab-tested product and talk with your healthcare provider.

What Is the Most Potent Brand of RSO Oil?

There isn’t one brand that’s always the most potent, since THC levels can vary by product and batch. RSO is already highly concentrated, often containing 60% to 90% THC. Check the lab results for the specific syringe you’re considering rather than relying on the brand name—and remember that more THC isn’t necessarily better.

Does the Strain Matter with RSO?

It can. Strain-specific RSO can have different cannabinoid and terpene profiles depending on the cannabis used to make it. But strain name alone doesn’t tell you exactly how an RSO will affect you. Check the product’s cannabinoid profile and lab results, especially when comparing RSO from different strains.

Is RSO Stronger Than Regular Cannabis Oil?

Usually, yes. RSO is a highly concentrated, full-spectrum cannabis extract and often contains much more THC than products sold as cannabis oils or tinctures. But “cannabis oil” is a broad term, so potency ultimately depends on the specific product, be it distillate, FECO, or something else. Check the label or lab results rather than assuming RSO will always be stronger.