How to Use FECO: Dosing, Methods and Can You Smoke It?
Quick answer: FECO (Full Extract Cannabis Oil) is a thick, very potent whole-plant cannabis oil, similar to RSO, designed to be ingested, not smoked. The usual way to use it is orally: a tiny, rice-grain-sized dose swallowed or held under the tongue, often in a capsule or on food. It is slow to kick in (up to a couple of hours) and strong, so start very small. It is not made for dabbing or smoking.
FECO stands for Full Extract Cannabis Oil, a thick, dark, highly concentrated whole-plant oil that captures a broad range of cannabinoids and terpenes. It is closely related to RSO (Rick Simpson Oil) and is valued by users who want a potent, full-spectrum product. Crucially, it is formulated to be taken orally, not inhaled.
Recommended Strains
Sour Diesel Regular
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THC | 21% - 23% (Medium) |
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Type | Regular |
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Yield | High |
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Phenotype | 30% Indica / 70% Sativa |
Sour Kush
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THC | 16% - 21% (Medium) |
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Type | Feminized |
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Yield | High |
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Phenotype | 60% Indica / 40% Sativa |
Because it is so concentrated, how you use and dose FECO matters a lot. Below we explain the main ways to take it, how much to start with, how long it takes to work, and the common question of whether you can smoke it, along with the important caveat that this is general information, not medical guidance.
| Way to use FECO | How |
|---|---|
| Oral (swallow) | A rice-grain-sized dose, often in a capsule or on food; slow, long-lasting |
| Sublingual (under tongue) | Hold a small dose under the tongue before swallowing; somewhat faster |
| Topical | Applied to skin by some users; localized, non-intoxicating |
| Dabbing/smoking | Not recommended: FECO is made for ingestion, not inhaling |
How to Dose and Take FECO
The golden rule with FECO is start very small. A common starting dose is about the size of a grain of rice (or less), taken orally, either swallowed directly, placed in an empty capsule, spread on a cracker, or held briefly under the tongue for a slightly faster onset. Many people take it in the evening because the effects are strong and long-lasting.
Go slow: because it is ingested, FECO behaves like an edible, so wait a full one to two hours before considering more, and increase only gradually over days if needed. Measuring a consistent small dose each time matters, and a little goes a long way. Store it cool, dark and clearly labelled, well away from children and pets.
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Can You Smoke FECO? And How Long It Takes to Work
Can you smoke FECO? It is not recommended. FECO is a full-extract oil made for ingestion, and depending on how it was produced it may contain residual material or be formulated in a way that is not meant to be vaporized or dabbed cleanly, so inhaling it can be harsh and is not its intended use. If you want an inhalable concentrate, a proper distillate or a dab-ready extract is the right product instead.
On timing, because you ingest it, FECO works like a strong edible: onset is typically 30 to 90 minutes, sometimes up to two hours, and effects can last several hours. That delay is exactly why you must wait before taking more. For a gentler, measured approach, see our guide on microdosing, and for the decarb science behind activating cannabis oils, our decarboxylation guide.
FECO vs RSO vs Distillate
FECO is often compared to RSO and distillate. FECO and RSO are both thick, full-spectrum whole-plant oils meant for ingestion, keeping a broad range of cannabinoids and terpenes; the terms are frequently used interchangeably, with small differences in solvent and process. Distillate, by contrast, is refined to near-pure single cannabinoids and is near-flavourless, better suited to vapes and precise dosing than whole-plant oils.
So if you want a potent, full-spectrum oil to take orally, FECO (or RSO) is the category; if you want a purified, inhalable or highly standardised product, distillate fits better. For that side, see our guide on distillate. Whichever you use, potency is high, so dose conservatively and keep expectations and safety in mind.
Storing FECO and Common Mistakes
FECO is thick and sticky, so a few handling tips help. Many people keep it in the oral syringe it often comes in, or in a small airtight jar, stored cool and dark so the cannabinoids and terpenes stay stable. Warming the syringe slightly in your hands makes the oil easier to dispense into a capsule or onto food. Always label it and keep it away from children and pets.
The most common mistake is taking too much too soon, because FECO is extremely potent and slow to act, it is easy to redose before the first dose has kicked in and end up far too high. Start with a tiny amount, wait a couple of hours, and increase only gradually over days. The second mistake is trying to smoke or dab it; it is made for ingestion, so use it orally or sublingually instead.
Who Uses FECO and Why
FECO appeals to people who want a potent, full-spectrum oil they can dose precisely and take without smoking, and it is popular among those seeking a strong, long-lasting effect from a small amount. Because it keeps a broad range of cannabinoids and terpenes, some prefer it to purified products for a more whole-plant experience.
That said, FECO is very strong and unregulated products vary, so it is not a casual product. If you are considering it for a health reason, that is a conversation to have with a healthcare professional, not something to self-direct, especially alongside other medication. Buy only lab-tested oil from reputable sources, and treat the potency with respect. This is general information, not medical advice.
FAQs About FECO
Can you smoke FECO?
It is not recommended. FECO (Full Extract Cannabis Oil) is made to be ingested, not inhaled, so smoking or dabbing it can be harsh and is not its intended use. For an inhalable concentrate, use a proper distillate or dab-ready extract instead. Take FECO orally or sublingually in a very small dose.
How long does FECO take to kick in?
Because you ingest it, FECO works like a strong edible: onset is usually 30 to 90 minutes and can take up to two hours, with effects lasting several hours. That slow onset is exactly why you should start with a tiny dose and wait before taking more, rather than redosing early.
What is FECO and how do you use it?
FECO is Full Extract Cannabis Oil, a thick, potent, full-spectrum whole-plant oil similar to RSO, made for ingesting. Use it orally or under the tongue in a very small, rice-grain-sized dose, often in a capsule or on food. It is strong and slow, so start tiny, wait, and talk to a professional for any medical use.
How much FECO should I take?
Start tiny, about the size of a grain of rice or less, taken orally, then wait a full one to two hours before considering more, since it acts like a strong edible. Increase only gradually over days if needed. FECO is very potent, so conservative dosing matters. For health use, consult a professional. Not medical advice.
