r/toxicology

▲ 1 r/toxicology+1 crossposts

ETG rapid cup test 34 hours since last drink

I have a possible rapid cup test tomorrow morning at 9:30
Last drink was at 11:00pm last night and had 3-4 shots from 8:30 until then. I have a possible rapid cup test for pretrial tomorrow.8 I weight 190lbs and no previous consumption for months before hand. Am I cooked or should I stop overthinking it. Any pointers will help as well

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u/Klutzy_Writing9059 — 20 hours ago
▲ 6 r/toxicology+1 crossposts

The Styrian Arsenic Eaters: A documented case of humans developing tolerance to lethal doses of arsenic over generations

From at least the 15th century through the early 1900s,

rural farmers in Styria, Austria consumed arsenic trioxide

regularly — in doses exceeding the established lethal threshold

for untrained adults.

What makes this case medically significant:

- They consumed arsenic trisulfide, not refined arsenic —

a coarser compound with significantly lower bioavailability

- The liver appears to build detoxification pathways

with gradual, repeated exposure

- Chronic arsenic poisoning symptoms — cancer, nerve damage,

skin lesions — were largely absent in documented cases

- When they stopped, withdrawal symptoms appeared:

nausea, cramps, intense cravings — consistent

with physiological dependence

The mechanism behind their tolerance is still not

fully explained by modern toxicology.

What's your take — genetic adaptation over generations,

or purely a pharmacokinetic explanation?

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u/jignesh0924 — 2 days ago

under the idea of "it's not the poison it's the dose", can you poison a person's meal using every day kitchen items like vegetables?

I know nothing about Toxicology and I probably got that quote wrong

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u/Adam-Garden — 3 days ago
▲ 2 r/toxicology+1 crossposts

Which Mycotoxins test better? Urine or Blood?

Hi everyone! Which mycotoxin test would you recommend if I've already moved out of my previous house but I'm still dealing with chronic fatigue and brain fog? Has anyone here had experience with both tests? I'd really appreciate hearing your thoughts.

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u/Mysterious-Act3090 — 3 days ago

Advice

m in my second year of college and Im really set on going into forensic toxicology, but Im really struggling with calc. I am a chem major and this is my first time retaking calc after i failed last semester, and im failing again. After my first failed test i started meeting with my prof and going to tutoring but i cant seem to get over a 59.7 on any exam/test i take. am i doomed and should i just find another career ?

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u/Sufficient-Space-196 — 5 days ago
▲ 2.8k r/toxicology+4 crossposts

Nearly 300 studies now classify a common pesticide as a multi-system toxicant, reaching far beyond the brain

The Core Issue

Chlorpyrifos (CP) is an organophosphate (nerve-disrupting) pesticide still permitted on U.S. food crops like apples and soybeans, despite being banned for household use since 2001. Over 40 countries, including the EU, have restricted or eliminated it entirely. A new review synthesizing nearly 300 studies suggests the regulatory picture has not kept pace with the science.

The Finding

The review, published in the International Journal of Molecular Sciences in April 2026, suggests chlorpyrifos damages far more than the nervous system. Harm appears to extend to the liver, gut microbiome, muscles, reproductive organs, bones, and hormonal systems. Its metabolite, chlorpyrifos-oxon, is roughly 1,000 times more toxic than the parent compound and may disrupt learning, memory, inflammation, and nerve cell survival.

Why It Matters

Harmful effects appear to occur at exposure levels below what current safety standards consider dangerous. As one Emory University public health researcher put it, the science now shows chlorpyrifos causes harm through DNA damage, shifts in gene expression, hormone interference, and gut bacteria disruption, not just its original nerve-agent mechanism. Fetuses and children are especially vulnerable, with prenatal exposure linked to brain abnormalities and weaker motor skills in children.

Limitations of Study

The review draws on lab experiments, animal studies, and epidemiological data, each with their own methodological constraints. Many of the molecular mechanisms are still not fully understood, and the authors note that current safety testing methods may simply be too blunt to detect effects at low exposure levels.

Interesting Statistics

• Nearly 300 studies were synthesized, covering research published up to April 2026
• The metabolite chlorpyrifos-oxon is approximately 1,000 times more toxic than chlorpyrifos itself
• Long-term exposure is associated with more than a 2.5-fold increased risk of Parkinson's disease
• A 2025 study on New York City children linked prenatal exposure to widespread brain abnormalities
• Residues are commonly detected in fruits, vegetables, grains, dairy, and drinking water

Useful Takeaways

Exposure happens primarily through food, inhalation, and skin contact. Choosing organic produce for high-residue crops and filtering drinking water are practical steps worth considering, though they do not eliminate exposure entirely given how widely residues appear in the food supply.

TL;DR

A review of nearly 300 studies suggests chlorpyrifos is a multi-system toxicant that damages the brain, hormones, liver, gut, and more, at levels that current safety standards may not even flag as dangerous.

biomesci.com
u/Technical_savoir — 12 days ago
▲ 1.5k r/toxicology+1 crossposts

A 16-year-old collapsed and died after drinking two energy drinks, a latte, and a Mountain Dew in under 2 hours.

Davis Allen Cripe was a healthy 16-year-old with no heart condition.

He collapsed and died at school in South Carolina in April 2017. The coroner didn't blame a pre-existing problem. He blamed a large Mountain Dew, a café latte, and an energy drink consumed in under two hours.

Richland County Coroner Gary Watts held a press conference specifically to clarify that Davis had no underlying heart condition and that caffeine toxicity caused a fatal cardiac arrhythmia.

"This is not a caffeine overdose," Watts said. "We're not saying that. What we're saying is that this is a caffeine-induced cardiac event."

The total caffeine across the three drinks was estimated at between 400 and 470 milligrams, consumed rapidly within approximately two hours.

The FDA's general guidance puts 400mg per day as the threshold above which cardiovascular risks increase in healthy adults.

Davis hit that threshold in a single sitting with no time for his body to process it between drinks.

Davis had been at school for a robotics competition. He collapsed after a break and could not be revived.

He was 16 years old and had done nothing most teenagers don't do every day. The speed and volume of consumption were what killed him.

https://preview.redd.it/xclo1eeqhy8h1.png?width=629&format=png&auto=webp&s=5d926cca0b9f5091f6840b84d1e98479ee1a5c05

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u/Scary_Pay_4247 — 13 days ago

what could that substance be? I’m having myoclonus and hallucinations .I don’t need medical advicw only help wirh identification.

It was sold to me as a coke. Is that bath salts?

u/East-Blacksmith720 — 8 days ago
▲ 129 r/toxicology+1 crossposts

Russian Journalist dies of Mushroom Poisoning

https://www.lbc.co.uk/article/russian-journalist-dead-mushrooms-putin-5HjdbwN_2/

Very sad. Also toxicologically interesting. The report describes this as “mushroom poisoning,” but I haven’t seen details on symptoms, or the implicated mushroom. Would really like to know exactly what “mushroom poisoning” happened here as a muscarinic mushroom exposure would look very different from amatoxin, orellanine, gyromitrin etc...

Given past poisonings involving Russian dissidents, people will understandably speculate. Complicating this is that Russian dissidents have been poisoned with agents that can look identical to muscarinic mushroom poisoning (nerve agents such as novichock, see Navalny, or Sergei and Yulia Skripal) .

u/EMPoisonPharmD — 13 days ago
▲ 1 r/toxicology+1 crossposts

Does anyone have knowledge or worked in a drug testing laboratory ?

I get tested for controlled medications. I am not perfect and unfortunately made a mistake. I had 2 highly potent delta 8 thcp 1,000mg each 60 days before my test. It was a toxicology comphrensive lab test with lc ms ms confirmation . I have never had to take such types of drug testing. I am tested for everything and all confirmation. Even Lexapro. I know with legit fda clia waived thc home testing. I was negative 10 times for 15ng ml. Friends I know passed a basic quantitative passing the same drug test. My fear is I know im well under the refrence range. Is it uncommon for doctors to want any amount detected Even 1 ng/ml?? The test shows a refrence range of 50ng/ml which means cut off? I would greatly appreciate any help.

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u/Confident-Water-132 — 10 days ago
▲ 2 r/toxicology+2 crossposts

Ate slug pellets dangerous to breathe in?

My dad put down lots of slug pellets on the stone slabs on the garden entrance by the kitchen. When I told him this wasn't a good idea, he flipped out. In the meantime, he has walked round most of the house and there is a genuine possibility that pellets or powder have been tracked around the carpets. I have walked in my room in the same slippers I wore round the house. It is late and I am tired. Can the powder become airborne and be breathed in and cause harm. I kinda want to go bed and leave it till the morning. The pellets may be the older kind which, according to google were banned in 2022 but am scared to open up the door and go out again tonight. No one seems to be showing any symptoms of harm yet. Any advice is appreciated, thanks.

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u/IncoherrentBabble96 — 10 days ago

Does organic actually make much of a difference when it comes to essential oils or hydrosols?

I ask, because essential oils are highly concentrated, and also because I'm not sure how much pesticide would get into hydrosols and because organic seems questionable to me if it's better given regulations and pesticides used when it comes to organic agriculture and labels.

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u/This_Caterpillar_330 — 12 days ago