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Tonic water actually glows blue under UV light due to its quinine content - early British colonists used this to detect counterfeit notes.
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The British East India Company created tonic water in the 1800s to make anti-malarial quinine more palatable for troops.
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Modern tonic water contains 83% less quinine than its medicinal ancestor - you'd need to drink 12 litres to get a therapeutic dose.
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During WWII, Japanese occupation of Java caused a global tonic shortage as they controlled 90% of the world's quinine supply.
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Before becoming a mixer, tonic water was considered a proper medicine and sold in pharmacies across Britain.
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The gin and tonic was accidentally invented when British officers in India added gin to improve the bitter taste of their daily tonic.
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In Peru, where quinine was discovered, the bark containing it was called 'cinchona' or 'fever tree' - hence the posh tonic brand name.
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Until 2010, British pilots in the RAF were required to drink tonic water in tropical regions as an anti-malarial precaution.
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Which of these did you find most fun?
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