What is the Carolina Reaper and how hot is it on the Scoville scale?

Carolina Reaper.

How do you quantify the ‘hotness’ of a chilli?

Over a century ago, a scientist called Wilbur Scoville attempted to put up a "heat" scale for peppers. The Scoville scale of hotness was set up as the dilution in sugar water required for a group of trained tasters. How much sugar-water is needed to be diluted into a chilli pepper mash to get to the point where you no longer feel the heat at all? The answer would be measured in Scoville Heat Units (SHU).

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World's hottest chilli pepper, the ‘Carolina Reaper’, gives man 'thunderclap' headaches

 

Thankfully, a new method was devised several years later and tasters are no longer subjected to eating hot chilli peppers. Scientists use a high performance liquid chromatography process which measures the amount of capsaicin in the pepper itself to define the heat. Capsaicin or capsaicinoids is the concentration of the chemical compounds responsible for the heat sensation in substances.

However, the measurement of hot chilli pepper heat is still considered to be subjective and some aspects like where the pepper is grown can produce different results.

In 2000, the hottest chilli pepper in the world was said to be the Bhut Jolokia chilli from Assam. Until this, the world's fieriest chilli variety was thought to be the 'Red Savina' Habanero from Mexico.

GUWAHATI--10-07-2009 A vendor sales world’s hottest chilli “Bhut Jolokia” in a local market in Guwahati on Friday, July 10, 2009. The world’s hottest chilli could soon become part of India’s defence armoury with scientists in the Defence Research and Development Organization (DRDO) trying to develop teargas canisters and hand grenades by mixing the fiery pepper to control riots and combat separatists. Indian security forces are planning to use the world's hottest chilli powder in non-lethal hand grenades to control riots and in counter-insurgency operations to numb the enemy and immobilize them without seriously wounding or killing them. Grown in the northeast India’s Nagaland and Assam states Bhut Jolokia is about 1,000 times more spicy than the common chilli and twice as fiery as the Red Savina, a Mexican variety. The authorities were also planning to coat fences of army bases near reserve forests with Bhut Jolokia to keep rogue elephants away. A kilogram of Bhut Jolokia sells at about Rs.250 in Assam state. PHOTO: RITU_RAJ_KONWAR GUWAHATI--10-07-2009 A vendor sales world’s hottest chilli “Bhut Jolokia” in a local market in Guwahati on Friday, July 10, 2009. The world’s hottest chilli could soon become part of India’s defence armoury with scientists in the Defence Research and Development Organization (DRDO) trying to develop teargas canisters and hand grenades by mixing the fiery pepper to control riots and combat separatists. Indian security forces are planning to use the world's hottest chilli powder in non-lethal hand grenades to control riots and in counter-insurgency operations to numb the enemy and immobilize them without seriously wounding or killing them. Grown in the northeast India’s Nagaland and Assam states Bhut Jolokia is about 1,000 times more spicy than the common chilli and twice as fiery as the Red Savina, a Mexican variety. The authorities were also planning to coat fences of army bases near reserve forests with Bhut Jolokia to keep rogue

 

Since then, several other varieties of the chilli peppers took the top spot, including the Trinidad Moruga Scorpion (so hot "you might be better off eating an actual scorpion")

In 2013, the Carolina Reaper chilli pepper was termed the hottest on Earth, ending a more than four-year drive to prove no one grows a more scorching chilli. The heat of the peppers was certified by students at Winthrop University, who test food as part of their undergraduate classes. The Carolina Reaper is so hot that a 34-year-old man who ate one during a contest in the US ended up in casualty suffering from “thunderclap headaches”.

So just how hot is the Carolina Reaper? Here’s a list of other peppers and their Scoville units to help you compare:

Capsicum or Bell pepper – 0 SHU

Jalapeno peppers - 2,500 SHU

Tabasco sauce – 5,000 SHU

Carolina Reaper – 1,641,183 SHU