MK Ultra

aka MK Ultra OG, MKU, MK-Ultra

MK Ultra is a legendary indica-dominant hybrid (G13 x OG Kush) bred by T.H. Seeds in the early 2000s, prized for its intensely sedating, couch-locking effects. With earthy, piney, diesel aromas driven by myrcene and caryophyllene, it delivers deep relaxation, euphoria, and eventual sleepiness. A multiple Cannabis Cup winner, it's a nighttime strain best suited for experienced users seeking serious rest.

The Short Answer

What kind of high is MK Ultra?

Myrcene-led and sweet-pine on the palate, most often reported relaxed and picked for sleep & bedtime at night.

Terpenes decide how a strain feels — THC% only decides how strong the dose is. Here is the family, the chemistry behind it, and what people reach for it to do.

High Family
Entourage High
Full Entourage Effect
🔥 THC-Dominant
Dominant Terpenes
Myrcene
Smells Earthy, musky, fruity
  • Sedating
  • Muscle relaxant
  • Anti inflammatory
  • Caryophyllene Spicy, peppery, woody
  • Limonene Citrus, lemon, orange

Ordered by measured share — the exact percentages shift with every batch and cure.

How It Feels
Relaxed
  • Sleepy
  • Euphoric
Best For
Tastes Like
Sweet pine
  • Earthy
Smells Like
Earthy pine
  • Diesel
  • Best Time night
  • Era 2003
  • Rarity Common

Genetics Indica-Dominant Hybrid A lineage label, not an effects predictor — most modern flower is a hybrid, and the terpene mix above is what you will actually notice.

Potency Check the label, not the strain Varies by batch, grower and harvest — check the label on the product you are buying. Scan your label → Reported ranges →

Heads up Most reported: dry mouth and dry eyes. Responses vary — start low, go slow. Review safety →

This strain has its own song — hit play, read along, and chill out.

MK Ultra Soundtrack

AI-generated for this strain

Stoner Metal65 BPMC minor
0:002:56

Verse

Chorus

Verse

Chorus

Bridge

Strain Highlights

Key insights at a glance

1
Legendary G13 x OG Kush cross bred by T.H. Seeds, famous for intense full-body sedation
2
Myrcene and caryophyllene-driven profile delivers deep relaxation and pain-relief potential
3
Multiple Cannabis Cup winner including 1st Place Indica at the 2003 High Times Cup
4
Earthy, piney, diesel aroma with sweet and citrus undertones on the exhale

The Experience

Professor High Avatar

Professor High Says...

In-depth strain breakdown from Professor High, our AI cannabis expert

4.6 / 5 Rated 4.6 out of 5 by Professor High

The moment this one hits, you feel the euphoria wash in fast — bright, warm, almost giddy. But don't get comfortable thinking it's a head-only ride. Within minutes, that myrcene-driven heaviness creeps into your limbs like a slow tide pulling you under. Your muscles loosen, your thoughts soften, and that pine-diesel exhale lingers on your tongue as your body starts negotiating with gravity.

This is a full sedation experience — the kind where creative sparks flicker early but get gently smothered by an irresistible wave of sleepiness. I feel hungry, content, and increasingly horizontal. There's no fighting it once caryophyllene's peppery undertow and that thick myrcene backbone take hold. By the peak, conversation slows to a mumble and the couch becomes a permanent address. This is not a 'do things' high — it's a 'become one with the blanket' high, and honestly, that's exactly the point.

Indica-Dominant Hybrid
Myrcene Forward
night Use

Effects Profile

Relaxed · Sleepy · Euphoric
Relaxed Sleepy Euphoric Happy

Best enjoyed during night

Deep relaxation and sleep

Best For

Sleep & Bedtime · Watching TV/Movies · Stress Relief

Look, Aroma & Taste

Aroma & Flavor

Earthy · Pine · Diesel

Aromas

Earthy
Pine
Diesel

Flavors

Earthy
Pine
Sweet

Terpene Profile

Myrcene leads · 3 terpenes mapped
Total Terpene Content: 1.80% (Average)

Terpene Distribution

Terpene profile: Myrcene 0.8%, Caryophyllene 0.6%, Limonene 0.4% .

Myrcene Dominant

Flavor: Earthy, musky, fruity

Sedating Muscle relaxant Anti-inflammatory

Caryophyllene

Flavor: Spicy, peppery, woody

Anti-inflammatory Pain relief Anti-anxiety

Limonene

Flavor: Citrus, lemon, orange

Anxiety reduction Mood elevation Stress relief

Chemistry & Research

Medical Effects

9 reported therapeutic uses on file

Mental Effects

45 %
  • Stress Relief

    Reduces mental tension and racing thoughts effectively

  • Anxiety Reduction

    Calms anxiety symptoms without heavy cognitive impairment

  • Depression Support

    Elevates mood and reduces depressive symptoms

  • PTSD Management

    Alleviates PTSD symptoms and emotional distress

Professor High visualization

Body Effects

55 %
  • Pain Management

    Reduces chronic pain and general body discomfort

  • Sleep Support

    Promotes deep sleep and reduces insomnia symptoms

  • Muscle Relaxation

    Eases muscle spasms and tension throughout body

  • Inflammation Reduction

    Decreases inflammatory response in joints and tissues

  • Appetite Stimulation

    Increases appetite for users experiencing nausea

Medical Disclaimer: This information is AI-generated based on available research and user reports, provided for educational purposes only, and is not intended as medical advice. Cannabis affects everyone differently. Consult with a qualified healthcare professional before using cannabis for medical purposes. Do not use cannabis if pregnant, nursing, or have a medical condition without consulting your doctor.

What Research Says

Peer-reviewed studies, terpene science & safety guidance

What does the research say about MK Ultra?

MK Ultra is a indica cannabis strain containing up to 25.0% THC, with a terpene profile dominated by Myrcene and Caryophyllene. This page currently has good data confidence. Below are profile sources when available plus authoritative resources for understanding the compounds in this strain.

Educational resources only — not medical advice. Always consult a qualified clinician for health decisions.

Cannabinoids (THC & CBD)

THC 17-25% · Type I chemovar

THC% tells you how strong. Terpenes tell you how it feels.

THC percentage is a property of the product in your hand, not of the strain. It shifts with the batch, the grower, the harvest, and how the flower was cured and stored — the same strain can test several points apart from two different jars.

Treat the ranges below as market context for what to expect on a shelf — then read the actual label on the product you are buying, and use the terpene profile to judge how it will feel.

Type I THC-Dominant

High THC (>15%), low CBD (<1%) - Most common recreational strains

Reported THC Range
17-25%

Using It Well

Side Effects

Dry Mouth · Dry Eyes · +3 more

Side effects vary by individual. Start low, go slow. Consult a healthcare professional with concerns.

Dry Mouth
Dry Eyes
Couch-Lock
Drowsiness
Dizziness

These are commonly reported effects. Individual experiences may vary based on dosage, tolerance, and consumption method.

Where It Comes From

Lineage & History

G13 × OG Kush · bred by T.H. Seeds

MK Ultra is an indica-dominant hybrid strain created by crossing G13 and OG Kush, two legendary cannabis genetics. The strain originated in the early 2000s and became known for its powerful sedative effects and high potency.

Genetics

Origin Timeline

First cultivated in 2003

Breeder

T.H. Seeds

Seed Bank

T.H. Seeds

Awards & Recognition

10 awards & mentions

Competition Wins

2nd · La Bella Flor Cup · 2007 · Indoor
La Bella Flor Cup 2007

Indoor

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1st place for Best Indica
High Times Cannabis Cup 2003

Best Indica

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1st Place Indica
High Times Cannabis Cup 2003

Indica

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1st Place for Best Indica
2003
View Source (opens in new tab)
1st place in the Indica category
2003
View Source (opens in new tab)
2003 High Times Cannabis Cup
High Times Cannabis Cup 2003

Indica

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1st place in the Indica category at the 2003 Cannabis Cup
Cannabis Cup 2003

Indica

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Cannabis Cup Awards
High Times Cannabis Cup
View Source (opens in new tab)
Multiple Cannabis Cup Winner
Cannabis Cup
View Source (opens in new tab)

The Full Story

Detailed Description

The long-form profile · ~3 min read

MK Ultra: The Legendary Sedative Indica

Few strains carry a reputation as fearsome as MK Ultra. Named after the infamous CIA mind-control program, this indica-dominant powerhouse earned its cult status by delivering one of the most heavily sedating cerebral-to-couch experiences in cannabis. Bred by T.H. Seeds in the early 2000s, MK Ultra isn't a strain you casually reach for during the day — it's built for total shutdown.

🧬 Genetic Heritage & Lineage

MK Ultra was created by crossing G13 and OG Kush — two of cannabis's most storied genetic lines. G13 contributes deep, hypnotic body weight and mysterious underground lore of its own, while OG Kush brings its signature earthy-pine backbone and potent psychoactive punch. The result is an 80% Indica / 20% Sativa hybrid classified as a Type II chemovar, meaning it carries a balanced but THC-forward cannabinoid profile. First released by T.H. Seeds around 2003, MK Ultra (also known as MK Ultra OG or MKU) quickly became a benchmark strain for indica intensity.

👃 Terpene Profile & Aromatics

Lab-tested data confirms MK Ultra's terpene profile is led by:

  • Myrcene (0.85%) — the dominant terpene responsible for the strain's signature sedative, couch-locking body effect
  • Caryophyllene (0.55%) — a peppery, spicy terpene known for its interaction with CB2 receptors, contributing to the strain's pain-relieving potential
  • Limonene (0.4%) — a citrus-forward terpene that lifts mood and adds brightness to an otherwise heavy profile

Together these terpenes (roughly 1.8% total terpene content) create a complex aroma of earthy, piney, and diesel notes layered over woody, sweet, and skunky undertones, with hints of spicy and pungent funk rounding out the nose.

👅 Flavor Experience

The flavor mirrors the aroma closely but adds a few extra dimensions on the exhale. Expect an initial hit of earthy and pine flavor, moving into diesel and woody mid-notes, before finishing on sweet, citrus, and even faintly minty or herbal tones. The spicy and skunky finish lingers well after the smoke clears, marking this as a strain with real depth on the palate.

🎯 Effects & Experience

MK Ultra is famous for one thing above all: heavy sedation. Users consistently report a wave of relaxation and euphoria that builds quickly, followed by a drift into sleepiness that can be difficult to fight. Along the way, many notice a happy, creative, or even mildly focused mental state before the body effects take over completely. The hungry effect commonly kicks in as well, making this a strong candidate for appetite support. With THC levels ranging from 17% to 25%, potency varies by phenotype and batch, so dosing matters — this is not a strain to underestimate.

🎮 Use Cases & Activities

Given its intensity, MK Ultra is best reserved for nighttime use when there's nowhere left to be. It pairs well with:

  • Winding down after a long day
  • Deep relaxation or meditative rest
  • Managing chronic muscle tension
  • Settling into sleep

This is not a productivity or social strain — it's a full-stop, end-of-day companion.

💚 Medical & Therapeutic Potential

MK Ultra's heavy myrcene and caryophyllene content underpin its therapeutic reputation. Users report it may help with:

  • Pain management — caryophyllene's CB2 activity may support relief from chronic discomfort
  • Sleep support — myrcene's sedative properties may ease insomnia
  • Muscle relaxation — may ease spasms and physical tension
  • Stress and anxiety relief — the calming body-forward high may quiet racing thoughts
  • Mood support — some report relief from depressive symptoms and PTSD-related distress

🏆 Awards & Recognition

MK Ultra's award history reflects two decades of consistent recognition:

  • 1st Place Indica — High Times Cannabis Cup, 2003
  • 2nd Place — High Times Cannabis Cup, 2004
  • 2nd Place Indoor — La Bella Flor Cup, 2007
  • Indica Category — The Karma Cup, 2015

⚠️ Consumer Considerations

MK Ultra is best suited for experienced consumers comfortable with high-potency, heavily sedating indicas. Novices should approach with caution given its reputation for locking users to the couch. Common considerations include dry mouth, dry eyes, occasional dizziness, and in sensitive users, a touch of anxiety — all manageable with hydration and a low-and-slow dosing approach.

Research Methodology

How we compiled this strain profile

76%
Data Confidence

This strain profile was compiled from 24 published sources covering 'MK Ultra'. Our research pipeline cross-references these sources and reports how strongly they agree — see the confidence breakdown below.

Data Quality by Section

Terpenes High (12 sources)
Effects Low (20 sources)
Lineage High (22 sources)
Medical Low (16 sources)
Aromas Low (21 sources)
Cannabinoids Low (18 sources)
Last updated: August 14, 2026

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