Saiba o que são antioxidantes e quais são seus benefícios
Saber o que são antioxidantes, e os seus benefícios, é de suma importância, uma vez que essas substâncias são essenciais para o bom funcionando do corpo.
Encontrados em uma grande variedade de alimentos, entre eles algumas frutas, legumes, sementes, castanhas e proteína animal, os antioxidantes devem fazer parte da alimentação diária daqueles que buscam desacelerar os efeitos do envelhecimento.
Quer saber mais sobre o funcionamento dos antioxidantes no corpo e porque eles são essenciais? Então confira o artigo que preparamos para você.
Radicais livres no organismo
Para explicar melhor a função dos antioxidantes, é importante falar sobre os radicais livres, já que ambos interagem diretamente.
Os radicais livres são moléculas instáveis produzidas naturalmente pelo organismo humano durante o processo de queima do oxigênio. Esse processo ocorre durante a vida toda, por conta de alguns alimentos consumidos e até mesmo pelo ato de respirar.
Em níveis normais, os radicais livres não são prejudiciais à saúde, e podem ser considerados úteis para alguns processos das células.
O problema está quando são produzidos em excesso, pois essas moléculas podem ser tóxicas para o corpo. Os efeitos acumulativos prejudicam o funcionamento celular e se relacionam com o desenvolvimento de algumas doenças.
O que são antioxidantes e porque eles são importantes para a saúde?
O nosso organismo, por si só, consegue combater os radicais livres produzidos naturalmente, mantendo as taxas de oxigênio em equilíbrio.
No entanto, a exposição a alguns fatores externos, como, por exemplo, a poluição ambiental, raios solares, tabagismo, ingestão de álcool e o estresse, estimulam a produção de mais radicais livres, levando a um desequilíbrio no corpo.
Esse estado é chamado de estresse oxidativo e a boa notícia é que ele pode ser combatido ou, pelo menos, minimizado.
Os antioxidantes são todas as substâncias que evitam a oxidação das estruturas celulares, por meio da neutralização dos radicais livres, impedindo que eles causem algum problema no organismo.
Eles podem ser produzidos pelo corpo, como também são encontrados em abundância em diversos alimentos.
Tipos de antioxidantes
Para frear os danos dos radicais livres, o organismo possui dois sistemas antioxidantes:
- Enzimáticos: as enzimas antioxidantes são sistemas naturais do organismo que servem como defesa dos radicais livres.
- Não enzimáticos: os antioxidantes obtidos através da dieta são representados por vitaminas e minerais. Cada um desses nutrientes é único em termos de função antioxidante e estrutura, por isso, variar as fontes é importante para aumentar o combate aos radicais livres.
Benefícios dos antioxidantes para o corpo e saúde
Além de entender o que são antioxidantes é importante saber os muitos efeitos benéficos desta substância para o ser humano.
Entre os principais benefícios, podemos destacar:
- Melhora da aparência da pele, tornando-a mais viscosa e saudável;
- Prevenção do envelhecimento precoce;
- Retardo do envelhecimento natural da pele;
- Prevenção de doenças cardiovasculares;
- Prevenção de doenças degenerativas, como o Mal de Alzheimer e Parkinson;
- Redução do risco de desenvolvimento de alguns tipos de câncer.
Principais fontes de antioxidantes
É simples aumentar o consumo dessas substâncias, já que existem diversas fontes alimentares ricas delas.
Abaixo, confira os principais antioxidantes não enzimáticos e suas principais fontes.
– Vitamina C: pode ser encontrada em frutas cítricas, como a laranja, acerola e kiwi.
– Vitamina E: é encontrado nas oleaginosas (nozes, castanhas), azeite de oliva extra virgem, linhaça e peixes.
– Betacaroteno: encontrados em alimentos de coloração laranja, como a cenoura, abóbora e manga.
– Selênio: entre as fontes de selênio podemos destacar a carne vermelha, peixe, mariscos, ovos, gérmen de trigo.
– Flavonoides: pode ser encontrado nas uvas, tomate e chás.
– Isoflavonas: presente na soja e derivados, ervilha, tofu e missô.
Outra alternativa para aumentar a ingestão de antioxidantes é através do consumo de suplemento que possuam estes ativos em sua composição.
- OPS Super Mind: potente antioxidante que ajuda a preservar a integridade estrutural e funcional do Sistema Nervoso.
- OPS Super Eyes: possui os principais ativos para desacelerar os efeitos do envelhecimento nos olhos.
Acompanhe nosso blog para saber mais dicas de bem-estar e saúde.
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