Simon Maechling Profile picture
Aug 21 15 tweets 3 min read Read on X
I went for dinner with a “what-if” guy last night.
You know the type. Smart, curious, intense.

We sat down, ordered wine, and for a while it was normal. Work, travel, you know.

I told him worked in R&D for 20 years.
Then he leaned across the table and asked, dead serious: 1/
“What if glyphosate causes cancer?”

I smiled. Not because it was a silly question - but because I knew what kind of evening this was going to be. Every course, another apocalypse.

So I answered: 2/
Decades of studies, thousands of data points, trillions of meals eaten. Every major food safety authority - EFSA, EPA, WHO, Health Canada - has reviewed the evidence.

The verdict is the same: glyphosate isn’t carcinogenic at the levels people are exposed to.

And I added: 3/
Everything is chemistry. Water, coffee, vitamins, even the wine we were drinking. “Chemical” doesn’t mean “bad.” It just means matter.

The waiter cleared our plates. My friend stepped out for a smoke. Then came his next line: 4/
“What if glyphosate gets into our water?”

Sometimes it does, I told him - in trace amounts. But the question is always how much. When traces are found in water, they’re far below safety thresholds. Regulators check this constantly.

He came back in : 5/
Smoke clinging to his jacket. Funny, I thought - no one ever asks “What if cigarettes cause cancer?” (They do. Tobacco kills half of its long-term users.)

By the main course, he was ready for another. He poured a glass of wine and asked: 6/
“What if there are residues in our food?”

I glanced at his glass. He’d finished half a bottle by now.

Yes, I said. There are - in micrograms. But residue limits are set with massive safety margins, usually 100 times below anything that could cause harm. 7/
That’s toxicology 101. The dose makes the poison. A glass of wine is fine. Ten bottles will kill you. Same principle.

Funny how no one ever asks: “What if alcohol causes cancer?” (It does. It’s one of the strongest known carcinogens). He cut into his steak. He was frowning: 8/
I nodded toward his plate. “You know what actually does increase cancer risk? Eating too much red meat.

WHO classifies processed meat as carcinogenic, and unprocessed red meat as probably carcinogenic. Cancer risk rises measurably with... 9/
...high consumption. That steak in front of you carries far more proven risk than glyphosate residues ever could.”

He frowned, chewed slowly, and fired back again: 10/
“What if glyphosate is killing the soil?”

It isn’t. Glyphosate targets a plant enzyme that people and animals don’t even have. In fact, it enables conservation tillage - less plowing, healthier soil, more carbon stored.

By dessert, he made one last push: 11/
“What if glyphosate is destroying biodiversity?”

That’s backwards, I said. Without herbicides, farmers would need more land.

Glyphosate helps farmers grow more on less land leaving space for nature.

He leaned back. The “what-ifs” had run out.
So I gave him one of my own: 12/
“What if we banned glyphosate?”

What if farmers had to plow more, burning diesel and releasing millions of tons of CO₂?
What if yields fell and food prices spiked?
What if forests were cleared to make up the difference?
What if the poorest paid the highest price? 13/
The irony? He’d spent the night panicking about glyphosate.

But the three biggest, proven cancer risks in the room were already right in front of him:

the wine in his glass,
the steak on his plate,
and the cigarette he’d light on the walk home. 14/
The scariest “what-if” isn’t glyphosate. It’s what happens if we let fear, not facts, decide our future. 15/

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More from @simonmaechling

Aug 19
What if anti-science propaganda isn’t about “freedom” at all...

…but a foreign op to quietly sabotage your health?

Let’s talk about what no one wants to say out loud. 🧵👇1/
Every day, millions of people are told:

🌾 GMOs will kill you.
😨 Don't trust doctors.
💉 Vaccines are poison.
😡 Don’t trust regulators.
🧪 Chemicals are everywhere.

The message is loud. Emotional. Viral.

But ask yourself:
Who benefits? 2/
Because it’s not you.

You get:

→ Higher measles rates.
→ Slower cancer screening.
→ More pesticide fear, fewer food options.
→ Anxiety over every label, package, or molecule.

Meanwhile… 3/
Read 10 tweets
Aug 15
The US just cancelled US$500 million in mRNA research grants.

In 2025.

For a technology that saved millions of lives.

That’s not caution.
That’s cutting off your nose to spite your face. 🧵👇1/ Image
mRNA isn’t just a COVID-19 vaccine trick.

It’s a flexible platform that’s being tested for cancer, autoimmune diseases, and inherited conditions like sickle cell.

Shutting down research now? That’s science backwards. 2/
This move wasn’t a surprise.
It comes from a political playbook that’s replacing

science with ideology.
Removing independent experts. Slashing funding.

Undermining public trust.
That’s not governance. That’s sabotage. 3/
Read 10 tweets
Aug 3
Hi, Chemist here 👋

Why do some people think synthetic mRNA is dangerous?

Because they’re told it’s “unnatural,” untested, or secretly rewriting their DNA.

Let’s break that down - with facts.
(Spoiler alert - it's not). 🧵👇 1/
“It’s synthetic!”

Yes. And?

So is paracetamol. So is insulin. So is your Wi-Fi.

Synthetic doesn’t mean dangerous.
It just means designed to work better. 2/
“It contains N¹-methylpseudouridine!”

Correct. A tweaked version of a base that’s already found in your body.

This minor change makes the mRNA:

More stable.
Less inflammatory.
Easier to read by ribosomes.

No magic. Just chemistry. 3/
Read 10 tweets
Aug 3
Pesticides are among the most misunderstood tools in society today.

Everyone talks about what they are.

Almost no one explains how they’re tested, regulated, and monitored.

Let’s fix that.

A thread on pesticide safety,
and the science behind it: 🧵1/
First: most people think "chemical = dangerous."

But science doesn’t work that way.
Risk ≠ Hazard.

Even water can be lethal at high enough doses.
What matters is how much and how often you're exposed.

That’s the core of toxicology.
It’s called “The dose makes the poison.” 2/
So how is pesticide safety actually assessed?
Before approval, a pesticide must undergo:

✅ Acute toxicity
✅ Carcinogenicity
✅ Endocrine disruption
✅ Reproductive studies
✅ Environmental impact
✅ Chronic exposure studies

Over 100+ scientific studies.
Per product. 3/
Read 9 tweets
Jul 26
For over a decade, anti-GMO activists demanded long-term studies in mammals.

Not mice.
Not rats.
Primates.

Well... scientists did just that.
And the results are in.

Let’s talk about a 7-year feeding study in macaques.
🧵 1/👇 Image
Researchers fed two generations of cynomolgus monkeys diets made of ~70% GM maize.

The maize carried:

🌽 cry1Ab and cry2Aj (Bt proteins — insect protection).

🌿 EPSPS (herbicide tolerance — glyphosate resistance).

Control groups ate non-GM or conventional maize. 2/
Monkeys were monitored across two generations, with detailed assessments of:

🧬 Immune status.
🧪 Blood chemistry.
🧠 Serum metabolites.

No shortcuts. This wasn’t a 90-day rat test.
This was 7+ years, cradle to adulthood. 3/
Read 10 tweets
Jul 25
We fear invisible chemicals.

But we ignore the ones we can see. The ones that actually harm us every single day.

Let’s talk about the visible poisons we breathe, burn, and touch… and why no one seems to care. 🧵1/
We panic over “glyphosate traces” in cereal.

Meanwhile, burning wood in your cozy fireplace fills your home with benzene, formaldehyde, and fine particulates that cause cancer.

Nobody panics. We call it “natural warmth.” 2/
We ban safe pesticides based on microgram exposure models.

But light up a cigarette? Suddenly it’s personal freedom - even though it releases 7,000+ chemicals, 70 of which are known carcinogens.

The poison is visible. The choice is deliberate. 3/
Read 11 tweets

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