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Green tea cayenne pepper weight loss

Green Tea / April 13, 2019

getty_rf_photo_of_man_eating_hot_pepperI’m a spicy food lightweight. Pathetically so. I ask for “super mild” at Indian restaurants with a tub of yogurt. I think black pepper is spicy.

And I figured I wasn’t missing much beyond a burnt tongue until I started looking at the benefits of spicy food. Yes, there are benefits beyond watery eyes, a possible out-of-body experience, and bragging rights for consuming the most “suicide” wings.

Introduction

There are actually foods that can increase your metabolism and increase how much energy you use. These are known as thermogenic foods, since they get your body to burn more calories, which is a measure of heat/energy use (“therm” refers to heat) [1].

I guess “foods” isn’t really the right word for them, since they’re actually chemicals such as caffeine, the “hot” in hot peppers (capsaicin) and compounds in green tea (catechins). All these compounds can increase how much energy you use (up to 4-5% or 70-100 calories/day) and how much fat you burn (10-16% more).

Capsaicin: feel the burn

You know the “ate a hot pepper” feeling, right? Your eyes tear up. Your nose runs. You break out into a sweat. You grab for ice water.

Well, the good news is that that capsaicin, the chemical that’s kicking your ass, is actually increasing your metabolic rate. (The bad news is that your glass of water isn’t going to help put out the fire in your mouth. Try cold milk next time – capsaicin is fat soluble.)

How does capsaicin work? It triggers the “fight or flight” response hormones (catecholamines like epinephrine/adrenaline, norepinephrine/noradrenaline and dopamine). Some of the effects of these hormones are:

  • Your heart beats harder and faster
  • You breathe faster and deeper
  • Your body moves fat and glucose into the blood for your muscles to use

Catecholamines get your body ready for a fight or to run away. (Oddly enough, catecholamines don’t help much when trying to speak in front of a large audience – damn the slow wheels of evolution!)

How hot is hot? Measuring spiciness

The Scoville scale is a way to measure hot pepper heat (or spiciness) based on capsaicin content. The higher the number, the hotter the pepper.

Sweet peppers (bell peppers) have the lowest score of 0 Scoville heat units (SHU). Pure capsaicin has the highest score: 16 million SHU. (Just for reference, law enforcement pepper spray comes in at 5 million SHU.)

The hottest pepper is bhut jolokia (sometimes known as the “ghost pepper”) at 1 million SHU. Apparently in India, where this pepper is grown, locals smear it on fences as elephant repellent. Habanero & Scotch bonnet peppers have a score of around 250, 000 SHU. Other peppers like cayenne and jalapeño peppers have scores of 50, 000 and 5, 000 SHU, respectively.

Green tea: Caffeine and catechins

Green tea has two thermogenic compounds: caffeine and catechins.

Caffeine, yup I’ve heard of that, took too much during university. I need it in the morning to… zzzz.

Okay, now that I’ve had my coffee, on to catechin, which are antioxidant phytochemicals (literally plant chemicals) found in teas. Green tea has four types: epicatechin (EC), epicatechin-3-gallate, epigallocatechin (EGC), epigallocatechin gallate (EGCG). (For more on tea, see What You Should Know About Tea and All About Rooibos.)

In your body, catechins increase fat oxidation (burning of fat) by activating fat metabolizing enzymes (acyl-CoA oxidase/medium chain acyl CoA dehydrogenase) though a cellular chain of events [1].

Green tea (catechins and caffeine) together increase norepinephrine, by blocking an enzyme (catechol-O-methyltransferase; COMT) that reabsorbs noreinephrine. More norepinephrine means you’re getting ready for a fight or to make a mad dash to safety, just like with capsaicin.

But there seem to be genetic differences in how well green tea works. For instance, Asian populations appear to have a version of COMT that responds better to green tea than Caucasians [2]. See also Bryan Walsh’s article on whether green tea is right for you.

Research question

This week’s review looks as how capsaicin, green tea and sweet pepper affect people’s appetite when they try to lose or gain weight. Do capsaicin, green tea, and/or sweet pepper make you feel fuller?

Methods

Twenty-seven people risked their taste buds to see whether spiciness helped with controlling appetite or whether it was something else. Keep in mind that these people didn’t need to lose much weight since they were considered “normal” using BMI (average 22.2 kg/m2.)

What? Only 27 people!?

Yup, that’s it. After doing a mathematical calculation (called a power calculation) the researchers figured that they only need 24 people to see if spiciness changed people’s appetite, so they had 3 extra just in case.

Let the fun begin

Hmm, if you want to figure out if something controls appetite, what should you do? Maybe put people on a diet and give them the supposed appetite suppressant? That’s what the researchers did: They put people on a calorie restricted diet for three weeks with various foods that could help suppress appetite.

Then, the researchers also put everybody on a bulking diet for three weeks to see if the same supplements would have an effect when there was no hunger involved.

Thus, they were able to compare the effect of the foods in both a caloric deficit and caloric excess.

In both diets everybody got the same breakfast and lunch, but with smaller portions in the calorie restricted condition. Then, for supper they got the same food, but they could eat as much as they wanted.

Everybody got to try all the different supplements that included:

  • capsaicin – 510 mg of cayenne pepper capsules (40, 000 Scoville heat units)
  • green tea – 350 mL of green tea drink (598.5 mg catechins & 77 g caffeine)
  • CH-19 sweet pepper – 2.3 mg capsiate capsules
  • capsaicin + green tea together
  • placebo

Source: www.precisionnutrition.com

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