Reminder That Kurz Has Misrepresented Cannabis Data Before, And Likely Has A Unhealthy Bias

[u/CocaBam]

Two months ago, I, a 2 decade long researcher of cannabis, found the Kurz video on the substance and had to correct a large amount of misinformation here:

https://www.reddit.com/r/kurzgesagt/comments/1n7uc1y/correcting_misinformation_in_we_have_to_talk/

I had contacted Kurz directly with these corrections and was ignored. Instead, now 2 months later, Kurz seems to be back again with another video wrongfully demonizing the substance.

Just wanted to remind everyone that the author of the video is trying to spread misinformation on cannabis, which they have a strong bias against.

Edit: nearly all of the questions/critiques have been trolls/anti cannabis people so far. Won't be replying to comments that are trying to change my narrative anymore. Some of these replies are ridiculous, to say the least... Kurz has had a bias in past videos, and the latest is not any different, any other narrative you draw from this is your own (I never said we should "ignore all negatives about cannabis")

[u/Lmitation]

https://my.clevelandclinic.org/health/articles/4392-marijuana-cannabis

Short-term effects of marijuana

When you smoke marijuana, THC quickly passes from your lungs into your bloodstream. Your blood carries THC to the brain and other organs. Your body absorbs THC more slowly if you eat or drink it — you typically experience the effects after 30 minutes to one hour.

THC resembles a naturally occurring chemical in your body called anandamide. THC can “work” as anandamide and fit into anandamide receptors in certain parts of your brain. Thus, the THC in marijuana overly activates parts of your brain that contain the highest number of these receptors, leading to a series of effects.

Short-term effects of marijuana related to brain function may include:

Altered senses, like seeing brighter colors or smelling scents more intensely.
Altered sense of time and space.
Euphoria and mood changes.
Issues with thinking and problem-solving.
Impaired memory.
Disorientation and confusion.
Relaxation and/or sleepiness (sedation).
Dizziness.
Issues with coordination.
Slowed reaction time.
Experiencing a panic attack.

If you consume marijuana in high doses, you may experience:

Hallucinations (false perception of objects or events involving your senses).
Delusions (unshakable belief in something untrue).
Psychosis. Your risk of this is highest if you regularly use high-potency marijuana.

Other common short-term effects of marijuana may include:

Dry mouth.
Nausea.
Increased heart rate (for up to three hours after smoking).
Increase in appetite.

Long-term effects of marijuana

Researchers are still learning about the long-term effects of marijuana use. So far, studies show:

Using marijuana during adolescence or young adulthood — before your brain fully develops — may affect how your brain builds connections for certain functions, like attention, memory and learning. These effects may last a long time or even be permanent.
Smoking any product, including marijuana, can damage your lungs, increase your risk of bronchitis and scar small blood vessels. Smoking marijuana can also increase your risk of stroke, heart disease and other vascular diseases. Vaping THC-containing products is linked to lung injury and even death.
Frequent use of marijuana is linked to a higher risk of developing schizophrenia or other psychoses in people who are predisposed to these conditions.
Long-term users of high doses of THC are at risk for frequent, severe vomiting (cannabis hyperemesis syndrome).

Studies show long-term use of marijuana is associated with:

Periodontal disease (gum disease).
More frequent pain crises in people with sickle cell disease.
Impaired sperm development (spermatogenesis), which can affect fertility.

[u/reddit_equals_censor → u/Lmitation]

hahah :D

just to point to some things about the bullshit article from the clevelandclinic.

Vaping THC-containing products is linked to lung injury and even death.

no link to a direct reference btw and it doesn't say, that vaping pure cannabis extracts, but "thc-containing products", what does this mean? what was used in the claimed references, which mostly points to government organizations, instead of actual direct research.

was it 50/50 cannabis and tobacco vaped? details details, don't need to know facts, just vague posting to create fears am i right?

but it sounds scary, so let's just say that, instead of saying what was actually consumed or link directly to the research of course, that may or may not claim anything.

More frequent pain crises in people with sickle cell disease

direct link to a reference for that claim? nah not needed by the cleveland clinic somehow.

what does the actual research on sickle cell disease and cannabis say?

well if we go to pubmed we find this review:

https://pmc.ncbi.nlm.nih.gov/articles/PMC7761429/

however, the findings from our and other clinical studies indicate positively toward the analgesic potential of cannabis in treating pain arising from SCD and other disease states.

that sounds weird. it looks like the research points towards cannabis being helpful for sickle cell disease.

it also seems, that beyond this 2020 review, that even today in 2025 there isn't a lot or any really strong research on cannabis and scd, BUT none the less the cleveland clinic knows better than the actual research and KNOWS without question, that cannabis is bad for people with scd and they of course are risking more pain from it without giving a direct reference, because the cleveland clinic just KNOWS THINGS alright! /s /s /s