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Valentine’s Day Warning: Chocolate can kill. But how much?

February 8, 2026

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With Valentine’s Day approaching Mathspig has reposted this warning.

Chocolate contains a chemical called Theobromine. This alkaloid ( other alkaloids include cocaine, nicotine, caffeine, and strychnine) can kill humans. More info Wired Magazine.

How much chocolate is too much?

Firstly, the darker the chocolate the more Theobromine it contains.

According to About Chemistry based on the highest possible toxicity:

Image* VetmedicineCooking chocolate contains 8-10 times the Theobromine in Milk Chocolate.

According to Wired large doses of theobromine may cause “nausea and anorexia ….. sweating, trembling and severe headache.”

The Royal Society of Chemistry notes that chocolate does not contain caffeine, but theobromine induces similar symptoms.

LD50 for the lethal dose for 50% of the population for Theobromine is:

1000 mg/kg 0r 1gm/kg of body weight in humans

Death by Chocolate Calculations:

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Death by Chocolate for DOGS

February 8, 2026

choc wrap 1Chocolate can be fatal to dogs. As dogs are small they can easily eat enough chocolate to kill them. According to The Royal Society of Chemistry

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Mathspig Death by Chocolate for DOGS

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The National Geographic has an amazing interactive chart for dog poisoning by chocolate.

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Death by Chocolate for CATS

February 8, 2026

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Chocolate contains a poison called Theobromine.

LD50 for  Theobromine for cats is 200mg.

LD = Lethal Dose. LD50= Lethal Dose for 50% of the population. Cats in this case. This is how poison toxicity is measured. 

According to The Royal Society of Chemistrycats are hypersensitive to Theobromine but, as cats cannot taste sweetness, they are rarely poisoned.Mathspig Smiling Cat

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Crypto AO Tennis Competition … and the $10Million Winner is … not YOU! 

January 17, 2026

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You vs JANNIK SINNER: No. 1 Tennis Seed 2024. USA UNITS

You vs JANNIK SINNER: No. 1 Tennis Seed 2024. METRIC

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25 Amazing Numbers for 2025

January 15, 2026

ANSWERS TO Q 1 – 5 BELOW

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25 Amazing Numbers for 2025 … Q 6 – 10

January 10, 2026

Correction:

It was 43°C (109.4°F) in Melbourne when Mathspig was writing the post!!! I used the wrong heading – now corrected -when it was first published.

The Maximum temperature recorded for Melbourne was 46.4°C (115.5°F) in 2009.

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ANSWERS TO Q 6 – 10 BELOWImage

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AMAZING ANSWERS

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25 Amazing Numbers for 2025 

November 22, 2025

ANSWERS Q11 – 15 BELOWImageImageImageImage

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Ref: (bbc.com)

ImageRef: Dermatology Clinic

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REf:(time.com)

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25 Amazing Numbers for 2025

November 16, 2025

ANSWERS to 16 – 20 below

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Scientific American link

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25 AMAZING Numbers for 2025

November 14, 2025

ANSWERS 21 – 25 BELOW
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Zombie MathZ for Halloween

October 8, 2025

Every YEAR 8 Topic

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Zombie MathZ Links

Zombie MathZ 1: ZOMBIE Olympics

Zombie MathZ 2: You vs Zombie Godzilla RATIO USA Units

Zombie MathZ 2: You vs Zombie Godzilla RATIO METRIC

Zombie MathZ 3: Sports Graphs

Zombie MathZ 4: Simultaneous EquationZ

Zombie MathZ 5: Zombie Trigonometry

Zombie MathZ 6: Simultaneous Zombies & Decimals

Zombie MathZ 7: Scientific Notation for Zombies

Zombie MathZ 8: How many Americans believe in Zombies?

Zombie MathZ 9: Speed

Zombie MathZ 10: Percentages

 Zombie MathZ 11: Probability

Zombie MathZ 12: Mean ZOMBIE MOVIE

Zombie MathZ 13: Taking a FAKE-BLOOD BLOOD BATH … US units

Zombie MathZ 13: Taking a FAKE-BLOOD BLOOD BATH …… Metric

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