Cafeína – mitos e verdades

Cafeína – mitos e verdades

A cafeína é um estimulante natural encontrado em chás, café e chocolate.

Funciona estimulando o cérebro e o sistema nervoso central, ajudando a nos manter alertas e prevenindo o cansaço.

A cafeína é um estimulante natural consumido mundialmente. Ela funciona assim: Ao ser consumida, é rapidamente absorvida pelo intestino e vai para a corrente sanguínea, pela qual é transportada até o fígado. Lá ela é quebrada em compostos menores que afetam as funções de vários órgãos. O principal efeito da cafeína acontece no cérebro, bloqueando os efeitos da adenosina, um neurotransmissor que relaxa o cérebro e nos faz sentir cansados. Normalmente os níveis de adenosina vão crescendo ao longo do dia, aumentando a sensação de cansaço e a vontade de ir dormir, por para muitos, tomar café a partir de 16hs pode prejudicar a qualidade de seu repouso.

O efeito costuma aparecer rapidamente, por exemplo, a quantidade de cafeína em uma xícara de café pode levar apenas 20 min para alcançar a corrente sanguínea e por volta de uma hora alcança sua potência máxima.

Devido a sua capacidade de estimular o sistema nervoso central, a cafeína pode acelerar o metabolismo em até 11% e a queima de gordura em até 13%.

Resumindo: A cafeína pode acelerar o metabolismo e promover a perda de gordura.

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