Eu fiz uma postagem a um tempo atrás falando sobre o mito do cálcio, ou seja, o mito de que hoje em dia a gente está ingerindo pouco cálcio, e por isso existem tantos problemas de osteoporose:
Ok, tudo bem. O problema não está na baixa ingestão de cálcio. Mas então qual seria o problema? E nada mais natural que criar uma postagem pra complementar a postagem anterior dando a resposta pra essa questão. É o que faremos aqui.
Bem, tudo aquilo que comemos compete entre si pela absorção pelo nosso organismo. Quando temos uma alimentação equilibrada, com alimentos naturais e não processados, esses alimentos normalmente não têm excesso de nenhum nutriente. Eles vêm bem balanceados, com nutrientes diversos e sem nenhum deles concentrado.
Porém quando comemos alimentos processados, é exatamente o oposto disso o que acontece. Esses alimentos sempre têm excesso de sal/açúcar/gordura. E é exatamente esse excesso que interfere na absorção e na fisiologia do cálcio no organismo.
Não dá pra entrar em muitos detalhes da coisa, mas gostaria de pincelar um pouco sobre o pior dos três quando o assunto é cálcio: o açúcar.
O açúcar interfere diretamente nos níveis de vitamina D no sangue. E todos nós sabemos que uma das funções da vitamina D é justamente aumentar a absorção de cálcio pelo intestino. Então quem come muito açúcar, tem pouca vitamina D, e absorve pouco cálcio.
E não é só isso, o açúcar aumenta os níveis de insulina no sangue, que por sua vez inibe a produção do hormônio da paratireóide. E a supressão desse hormônio, por sua vez, aumenta e excreção de cálcio pelos rins.
Existem diversos outros efeitos do açúcar nos níveis de cálcio do corpo, mas a coisa ficaria muito técnica para explicar. Mas o mais importante de tudo é perceber que o excesso de açúcar não só diminui a absorção do cálcio, como também aumenta a sua excreção pela urina.
Sabendo disso, e também do fato de que hoje em dia somos verdadeiras formigas devoradoras de açúcar, fica fácil entender porque existem tantos casos de osteoporose e osteopenia aparecendo por aí. Fica a dica!
Gostou da leitura e quer mais? Aí vão algumas sugestões:
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Realmente, o açúcar é um dos maiores vilão da nossa alimentação industrializada e o ser humano na verdade é uma praga super resistente, por aguentar essa alimentação industrial lixo que ingerimos.
Nos anos 50, antes da banalização da gordura e do colesterol, haviam muitas estudos e pessoas fazendo testes para engordar animais mais rápido e logo eles perceberam que dar açúcar fazia os animais engordar mais rápido, mas a experiência não deu certo, pois os animais acabavam morrendo de várias complicações antes do animal chegar ao ponto de abate.
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Pois é, um dia as pessoas irão se conscientizar de que o açúcar é um verdadeiro veneno para a saúde.
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