Nikolas Woischnik

Impresario @toaberlin in Berlin, CDMX & Tokyo. / Angel Investor / Founder @ahoyberlin @opnrs. Alumni @aws @amazon. RT ≠ Endorsement

[Mert Deveci @gm_mertd]

Next time a VC tells you your company is not VC-scale, send them this

[Nikolas Woischnik @techberlin]

@rabois what can this do that I cant do with Claude cowork?

[Vishal Kapadia @vishkap]

Heading to @proofoftalk at the Louvre in Paris this week to explore the state of play for institutional adoption of digital assets. Appreciate RT for reach to connect with others attending

[Nikolas Woischnik @techberlin]

Great to see @katiayakov work her magic in SF now!

[Katia Yakovleva ✨ @katiayakov]

Frontier Demo Day is officially on the calendar 🗓️
Spots are limited - grab yours fast: https://t.co/zTYBQi7ipM

Batch 0: repeat founders who've done @ycombinator with their previous startups, generating ~$1M ARR, building in AI + longevity, backed by angels like @balajis and on the close radar of @speedrun.

This room will be stacked - tag the investor who shouldn’t miss it!
@frontiertower @Superherohotel

[Nikolas Woischnik @techberlin]

@pavelprata @murphcapital @a16z @OutcastVC @orangecollectv would love to hear more. Tried DMing you, can you DM me?

[Nikolas Woischnik @techberlin]

@pavelprata cant DM you, would love to connect!

[Bryan Johnson @bryan_johnson]

🚨 I HAVE NO MICROPLASTICS IN MY BALLS 🚨

This should not be possible.

Studies show that 100% of men have microplastics in their semen. I am the first human ever to show a complete reduction to zero.

This may be a world-first breakthrough in fertility research.

I had 165 microplastic particles in my semen just 18 months ago. Now, I have zero.

Five published studies have measured microplastics in human semen. Two found them in 100% of men. The other three found then in 44 to 76% of men tested, but those used methods that miss the smallest particles and the clear ones. Corrected for that, the real rate is likely 100%. Almost every man alive has plastic in his semen right now. The same applies to testicular tissue, testing 100% positive for microplastics.

Microplastics hurt sperm.

Human studies show the impact of various types of plastic, associated chemicals, and other toxins on male fertility:

+ 60% fewer normal shaped sperm (from PFAS)
+ 5x higher odds of low sperm count (from PTFE)
+ 10% lower sperm concentration (from PTFE)
+ 15% lower swimming ability (from PTFE)
+ 41% lower swimming ability (from PET)
+ 12% lower sperm swimming ability (from BPA)
+ 3x higher odds of low sperm count (from Phthalates)
+ 2x higher odds of poor swimming (from Phthalates)

The effects compound: each extra type of plastic drops sperm swimming ability by about 21%.

This matters even if you’re NOT trying to get pregnant.

Sperm count is one of the cleanest biomarkers of overall health we have. And microplastics don't stop at the testes.

The same particles are showing up everywhere we look. Studies show 4.5x higher rate of heart attack, stroke, and death in people with microplastics in their arterial plaque vs. those without. Microplastics were also found in 100% of human placentas tested.

100% of post-mortem human brains tested positive for microplastics. Brain concentrations rose ~50% between 2016 and 2024, and now sit at roughly 11x the levels found in the liver or kidney.

Where do these come from?
+ PTFE, commonly in non-stick pans
+ PET, water bottles
+ Phthalates, makes plastic soft and bendy
+ BPA, can linings
+ PFAS, stain-resistant fabrics & food packaging

Inside the body, plastic causes a kind of cellular rust. It triggers inflammation in the testicles, kills the cells that make sperm and drops testosterone. It's been confirmed across 39 animal and cell studies, then in human data.

MY PROTOCOL:

Note, what I did is n=1, not a controlled trial, I cannot prove cause.

1. Sauna (dry). My toxin blood panel confirms sauna clears plastic related chemicals: BPA, phthalates, PFAS, flame retardants, pesticides. The plastic particles themselves are too big to sweat out directly. Heat may activate other clearance routes: bile flow through the liver, the cell's internal cleanup system, and the gut barrier. Humans have almost no enzymes that can break plastic apart, so the body has to physically push it out.

2. Reverse osmosis water filter. Drinking water is likely a major source of microplastic getting into your body. A reverse osmosis filter pushes water through a very tight membrane and strains the particles out. I filter everything I drink.

3. Trying to rid my environment of the big plastic items: cutting boards, cups, plates, food storage containers, non-stick pans, cling wrap, tea bags, water bottles, kitchen utensils, kettles, and synthetic clothing. Note, as hard as I try, I'm always finding new plastic things in my life. This can be all-consuming thing so try to just knock out the big ones.

I did all three interventions at the same time. I cannot say which one did the most work. What I can say is this: going from 165 to zero in 18 months is possible.

Results:
Nov 2024: 165 particles/mL
Jul 2025: 20 particles/mL
Apr 2026: 0 particles/mL

The 18 month window also captures roughly 7 full spermatogenesis cycles.

[Ron Alfa @Ronalfa]

LinkedIn is basically Moltbook now.

[austin petersmith @awwstn]

i made a chrome extension that removes the AI slop from my linkedin feed

[Nikolas Woischnik @techberlin]

Runner finally launched to the public. Go give it a try and let me know what you think!
(Disclosure: Invested in the company and am grateful to be a small part of the journey!)

[yitong @yitong]

Introducing @runneragent, the knowledge work agent that works across all your apps to get real work done

It's simply the best way to stay on top of messages, project management, user feedback, and much more

Runner has become a daily driver for me and I think you'll like it too

[Camus @newstart_2024]

New UK screen time rules just dropped — and they’re stricter than most parents expected.

From 27 March 2026, England says: zero solo screens for under-2s (except quick video calls with family), and max one hour a day for 2–5 year olds — no screens at meals or the hour before bed. Co-view everything, stick to slow-paced content, and ditch fast social-media clips and AI toys completely.

The science is sobering: toddlers’ brains process info up to 10 times slower than adults. Fast-paced screens push them into fight-or-flight mode — racing heart, surging energy — while they’re sitting still. Researchers at the University of East London say this mismatch can wire kids for more tantrums and emotional struggles later. Using screens to calm meltdowns? It often backfires long-term.

As a parent, it’s brutal — we all know that explosion the second you take the tablet away.

But this feels like evidence finally catching up with what our gut has been telling us.

How are you handling screens with little ones — strict limits, co-viewing, or mostly winging it?

[Nikolas Woischnik @techberlin]

💯

[Alfred Lin @Alfred_Lin]

https://t.co/0328m6FbEI

[Nikolas Woischnik @techberlin]

After founding 5 startups and interviewing hundreds of founders, this really resonates with what I’ve seen firsthand.

[Alfred Lin @Alfred_Lin]

https://t.co/0328m6FbEI

[Nikolas Woischnik @techberlin]

“It’s tough to make predictions, especially about the future.” Yogi Berra

[Paul Saladino, MD @paulsaladinomd]

Lululemon is under investigation by Attorney General Ken Paxton. Throwback to a reel I posted 3 years ago...PFAs and other chemicals in your clothing are no joke.

[Nikolas Woischnik @techberlin]

@Tocelot @speedrun LG!

[Nikolas Woischnik @techberlin]

@martinvars Agree, one of my favorite cities in the US. Live music scene is great!

[Nikolas Woischnik @techberlin]

@levelsio Long live IRL businesses.

[Nikolas Woischnik @techberlin]

@jesslivingston @paulg would love to host you in Berlin!

[Nikolas Woischnik @techberlin]

@eriktorenberg @a16z Check your mail!