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Capsaicin in Chilli Peppers Increases Metabolism, Body Temperature

by Thilaka Ravi on August 8, 2008 at 3:11 PM
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 Capsaicin in Chilli Peppers Increases Metabolism, Body Temperature

Thermogenesis, the process by which cells convert energy into heat, can be directly induced by chilli peppers says a new study published in the Journal of Biological Chemistry.

Capsaicin is the active chemical in peppers that contributes to their spiciness, and the same stimulates a receptor found in sensory neurons, creating the heat sensation and subsequent reactions like redness and sweating.

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Now, Yasser Mahmoud has found that capsaicin can create "heat" in a more direct manner by altering the activity of a muscle protein called SERCA.

These findings further explain how capsaicin intake can increase metabolism and body temperature.

Normally, muscle contraction initiates following the release of a wave of calcium ions from a compartment called the sarcoplasmic reticulum (SR); SERCA then actively pumps the calcium back into the SR (using ATP energy), causing muscle relaxation and renewing the cycle.
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Capsaicin, however, can attach to SERCA and "uncouple" this pumping activity; that is, the protein still burns ATP energy but doesn't use it to pump calcium.

Instead, all the ATP energy is given off as heat.

This uncoupling, known as thermogenesis, is one important method of staying warm and is most often seen in hibernating animals.

Mahmoud notes that capsaicin is the first natural compound known to augment the thermogenesis process.

And although these studies required relatively high amounts of capsaicin (probably more than someone could eat), the structure of capsaicin could be used as a model to design more potent compounds that might have clinical use such as treating hypothermia.

Source: ANI
THK/M
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