Stijn Noorman Profile picture
Apr 7, 2025 18 tweets 5 min read Read on X
The most misunderstood drug in the world:

Weed.

It can either ruin your life or make it better.

Here's what it does to you (backed by science): Image
Weed consumption is on the rise.

It has increased about 4x in the last 10 years. Image
Ignore people who tell you weed is 100% good or bad.

Just like everything, it has benefits and downsides.

Here are the most important ones: Image
CBD ≠ THC.

CBD doesn't make you high.

THC can definitely get you high.

Here are the differences simplified:
The effects usually last a few hours.

But THC stays in your body for a long time. Image
Age matters when it comes to cannabis use.

The younger you are, the higher the chance that it'll negatively impact your mental health.
The effect weed has on you depends on:

• Your age
• Your genetics
• Your family history

The percentage of THC relative to CBD is also important.
People with ADHD (ab)use weed more often.

This is likely because of dopamine:
Cannabis narrows attention and focus.

So it can improve your attention and focus.

But the downsides is that it negatively affects your memory.
This explains why it's popular in the jiujutsu world.

It helps you to focus completely and it makes you more creative.
The downside of weed is how it affects your memory.

Especially your short-term memory.

This is because it reduces activity in the hippocampus.
Weed doesn't make you lazy.

If you're lazy, it won't make you disciplined.

If you're disciplined, it won't make you lazy.
Smoking more than twice a week changes how you speak.

This is because impacts the basal ganglia.

This is the brain center that's involved with movement.
You can heal your brain by quitting weed.

• Sleep
• Exercise
• Eat healthy

You can recover your brain in a few months.
I smoked weed for 3 years and quit 4 years ago.

If you smoke or quit weed, what was your experience?

Let me know below, curious to hear it!
Building my own digital writing business helped me to quit my bad habits.

Join 5,250+ digital writers to learn how to build a meaningful business that gives you time freedom:

stijn-noorman.kit.com/3cd5e65538
If you found this thread valuable:

1. Follow me @stijnnoorman for more posts on business, writing, and self-evolution.

2. RT the first tweet & check the links in my bio
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More from @stijnnoorman

Dec 4, 2025
The most valuable skill in the world:

Decision-making.

I studied how Naval, Elon, and billionaires make decisions.

Here's how you make better decisions than 99% of people: Image
Humans are better at spotting threats.

Because it's better for our survival.

Invert to make better decisions.
Use first-principles thinking.

Focus on the most fundamental truths.

Work your way up from there.

Question everything else.
Read 26 tweets
Nov 25, 2025
The most abused and misunderstood drug in the world:

Caffeine.

It can either ruin your life or make it much better.

Here’s how it works and how to use it properly (backed by science): Image
About 85% of American adults consume caffeine every day.

The average daily intake is about 200 mg.

The most common source of caffeine is coffee. Image
Caffeine is moderately addictive compared to other drugs.

• 80% of adults consume caffeine daily
• 35% show dependence symptoms
• 15% have significant dependence

Here’s how it compares to other drugs: Image
Read 20 tweets
Oct 28, 2025
I spent $2096 on writing courses.

Here are the 8 best lessons I learned to gain 20,000+ followers in 6 months:
1. Stairways

Stairways are underrated.

• Stand out
• Look good
• Easy to read

Pay attention to writing aesthetics. Image
2. Conciseness

People are busy.

Write like it.

• Simple
• Concise
• Practical

Simplicity is the ultimate profundity. Image
Read 13 tweets
Sep 3, 2025
Jordan Peterson and Andrew Huberman changed my life.

I watched hundreds of their videos over the last few years.

Here are the 20 best habits I learned that will change your life: Image
1. Caffeine Use

How to use caffeine properly:

• Don’t take caffeine within 90-120min of waking up
• Don’t take caffeine 10 hours before going to bed
• Don’t take more than 3-4 cups of coffee per day

Use this as guidelines, not rules. Image
2. Overcoming Procrastination

Procrastination is a trick of your brain to save energy.

This is good for survival but not for your goals.

Do what you actually need to do.
Read 25 tweets
Aug 28, 2025
Naval Ravikant changed my life.

I read his book and watched all his podcasts and videos.

Here are his 16 best lessons on becoming rich and happy: Image
Everyone can get rich.

There's only one thing you need:

Education.

Learn the right skills and you can get rich.
Jobs won't make you rich.

You won't get rich by renting out your time.

Invest or build your own brand.

Disconnect your time from your income. Image
Read 21 tweets
Jun 23, 2025
The most controversial drugs in the world:

Alcohol vs weed.

I studied the science on both to find out which one is worse.

Here's what they do to you (backed by science): Image
Weed use has drastically increased.

Alcohol use has also increased but not as much. Image
Alcohol is the drug that causes the most harm.

Especially harm to others.

It causes even more harm than heroin and crack. Image
Read 29 tweets

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