Peppers are measured using the SHU or the Scoville Heat Unit which indicates how spicy a certain variety of pepper is.

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According to the Guinness World Records, the Carolina Reaper is the world's hottest pepper with an average SHU of 1.5 million peaking at 2.2 million SHU. It is a crossbreed of the Red Habanero and Pakastani Naga.

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The Trinidad Moruga Scorpion Blend is a rare one with an SHU of 2,009,231.

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The Trinidad Moruga Scorpion Blend is a rare one with an SHU of 2,009,231.

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Get ready to rock with the 7 Pot Douglah, a blend of pepper that is not only hot, but also flavourful. Its SHU is measured at 1,853,936 million.

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The Naga Viper is extremely rare and cultivated in the UK. It is a super hot pepper with an SHU of 1.349 million.

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Another insanely hot pepper is 7 Pot Primo with an SHU of 1.268 million. It is easily recognisable because of its long, thin tail.

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Another insanely hot pepper is 7 Pot Primo with an SHU of 1.268 million. It is easily recognisable because of its long, thin tail.

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Bhut Jolokia (Ghost Pepper) is quite famous receiving a lot of media coverage. Its SHU is 1.041 million which is still very hot.

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The 7 Pot Barrackpore is from Chaguanas, Trinidad and Tobago measuring 1 million SHU.

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The 7 Pot Barrackpore is from Chaguanas, Trinidad and Tobago measuring 1 million SHU.

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