What's good in small concentrations, but lethal in higher? What's a glaring red flag you're encroaching on a lethal concentration?

Just about anything including water or salt

Panadol / Paracetamol / Tylenol / Acetaminophen / C8H9NO2 is exceptionally easy to overdose on. I've done it accidentally a couple of times. It causes liver damage at even lower overdoses, you really don't want that.

The maximum dosage is 1g every 4 to 6 hours, maximum total 4g a day. I am no doctor but I strongly recommend 6+ hours between doses (I set a timer) and I try very hard to not get to 3g or above per day. It's even worse that plenty of medications just throw it in to the mix casually.

Unfortunately as the only first line of defence I have against pain, I cannot avoid it altogether. Redflags for me were light abdominal pain and yellowing of skin under eyes. Plus fatigue, but that's normal in my world.

Weed. A gram will get you high. A woolpack full of it can crush you like a grape if falling from the hay loft.

Took a Hazmat class today and the big thing they drilled into our heads was "Everything is toxic at scale." So make anything you want and there is an IDLH concentration.

According to people I know, I’m only ok in small doses.

Then they leave.

Age

dying is a pretty big red flag, you ask me.

Botulism can kill you, botox can kill your wrinkles.

Everything is good in moderation. Even drinking too much water can lead to death.

ionizing radiation, according to some hypothesis, vitamin E, selenium, zinc,

there's no single "red flag" everything is different

It’s been said a lot that light alcohol consumption is actually good for your health, but this is not actually true. It improves some health outcomes but the benefits are outweighed by the risk. There is no safe amount of alcohol consumption.

There are lots of things that our body needs in really small doses. But anything above can be lethal.

Some things needs to be in really specific compounds. Like chrome we need really small dose of Cr3+ but Cr6+ is carcinogenic.

Everything. Literally everything can be fatal in large enough quantities. Quote from one of my chemistry professors: "there are no lethal substances, only lethal doses"

Water. You need it to live, but you can also drown in it or even drink too much and dilute your blood and die.

My medication. Lithium in small exactly precise doses according to each individual is helpful. But we have to take blood tests to check the toxicity.

We have to stay hydrated and be really careful if we are sick or vomiting

A warning signs is shaking (I tests my hands regularly), nausea and outcome is dying. Ha.

Acetaminophen/Paracetamol. The safe therapeutic dose is very close to the toxic dose. While most people don't intentionally overdose, at least not for treating illness symptoms, the problem arises when they take multiple medications that all contain acetaminophen, following the label for all of them can easily net you a toxic dose.

Chubbyemu video: https://www.youtube.com/watch?v=VSqrCgFMsCI

The human body is pretty weak so anything in high concentrations can probably kill us. It's no steel

Cocaine. A red flag being your heart beating itself to death inside your chest.

Salt.

Stupidity

Vitamin A. Probably others as well.

Also, water.

Heartbeats. 60 - 70 is good (you can get away with lower if you're fit, but anything below 40 is bad), and anything above 180 - 200+ tends to be quite bad for your health.

Blood sugar. Vital that you have enough to continue functioning but if it stays too high for too long, it will disable and eventually kill you.

Caffeine.

What's the LD50 of the internet? 🤔

Elephant steak vs elephant

Nicotine, small doses can be okay, but large doses and it's really lethal

Booze... Nurofen

LSD