The level of hotness and spiciness of hot chili peppers is rather subjective, depending on individual taste and cultural background. Capsicum is the genus of these plants. As a little kid, chilies fall under the “adult food” category; I didn’t have a clue why adults enjoy them so much. I had no desire to give them a try, since it was perceived as a torture to taste buds! I used to dislike peppers, be it chili peppers or the regular green peppers. My “adult food” list included coffee, alcoholic drinks, raw garlic and onions, bitter melon, phoenix claw (a.k.a. chicken feet) etc.
Eventually, I learned to appreciate the unique taste of “adult food”, including hot chili peppers. I like the taste of food on its own, don’t get me wrong. A hint (or splash, when in a greater amount) of these miraculous hot spices add a distinct flavour to food.
What is your tolerance threshold for hot, spicy food? Is there a standard measurement for the spicy level of chilies? Wilber Scoville developed the Scoville scale in 1912. “Scoville Organoleptic Test” was performed as a subjective measure of the heat level of chilies. Testers sipped a solution of sweetened blended pure chilies, with increasingly diluted concentrations, up to a point where there is no more burning sensation to the mouths. A number was then generated for individual chili peppers, on the basis of how much water needed for the dilution before the tasters can no longer taste or feel the heat.
The heat factor is expressed in the multiples of 100 units. 1.5 Scoville Units are based on one part of chili heat factor in 1 million drops of water. Pure capsaicin (the main hot ingredient in chili peppers) is rated between 15 and 16 million Scoville Units! It creates burning sensation in any tissues that come in contact; an irritant for humans and other mammals.
With the emergence of advanced technology, liquid chromatography is a more scientific and accurate measure of capsaicin levels.

These sweet bell peppers have zero Scoville Units.

Jalapeno scores between 2,500 and 8,00o Scoville Units.

Finger hot chilies are slightly hotter than jalapeno.

Thai chilies, between 50,000 and 100,000 Scoville Units!!!

“Mysteriously Hot Peppers?” Hmm…

“Dried Hottest Chili?” Perfect for cooking!
What about habanero peppers? How hot are they? The orange habanero chili is between 150,000 and 325,000 Scoville Units, where as Red Savina habanero is between 350,000 and 575,000 Scoville Units!!!!! The latter is also known as the Dominican Devil’s Tongue Pepper or the Ball of Fire Pepper in Guyana.
Who is the hottest of all? With Scoville Units greater than 1.04 million, Naga Jolokia is crowned with the title of “hottest chili in the world,” by the Guinness World Records. Ghost Chili of Ghost Pepper are some alternative names given to it.
The tolerance of hot chili peppers comes with years of practice. How to make the hot chilies hotter? Snap or cut chilies into smaller pieces in cooking, without removing seeds. Another proven experience is that previously frozen fresh chilies (i.e. green Thai chilies) taste hotter! There are different kinds of hot in dishes prepared with chilies: spicy hot, numb hot, sour hot, burning hot, tearing hot etc. The best ones would have to be those that are appetizing, with its pleasant smell and astonishing great taste; the more I eat, the more I enjoy!