Mélange de jus de citron et de bicarbonate de soude: des effets surprenants

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Cet article traite de certains des avantages potentiels de la consommation de mélanges de bicarbonate de soude et de jus de citron.

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La combinaison bicarbonate de soude et jus de citron est devenue un remède maison populaire. Certaines personnes affirment que le bicarbonate de soude et le jus de citron peuvent améliorer la peau, traiter les brûlures d’estomac et blanchir les dents. Plusieurs études scientifiques ont examiné les avantages pour la santé du bicarbonate de soude et du jus de citron séparément, mais il n’y a pas beaucoup de recherches pour soutenir les effets combinés de ces deux ingrédients.

Cet article traite de certains des avantages potentiels de la consommation de mélanges de bicarbonate de soude et de jus de citron.

Une note sur le pH

Une solution de bicarbonate de soude est alcaline, tandis que le jus de citron est acide. L’idée de combiner le bicarbonate de soude et le jus de citron s’inspire des principes de base de l’acidité et de l’échelle de pH. Les scientifiques utilisent l’échelle de pH pour mesurer l’acidité d’une solution. Une solution peut avoir un pH compris entre 0 et 14.

Plus le pH est faible, plus la solution est acide, donc :

Des niveaux de pH inférieurs à 7 indiquent une solution acide
Un pH supérieur à 7 indique une solution alcaline ou basique.
Les solutions neutres, comme l’eau pure, ont un pH de 7.
Le bicarbonate de soude, également connu sous le nom de bicarbonate de sodium, est une base. Cela signifie que lorsque l’on dissout le bicarbonate de soude dans l’eau, il forme une solution alcaline. Par exemple, une solution 0,1 molaire de bicarbonate de soude a un pH d’environ 8,3. Le jus de citron contient de l’acide citrique et a un pH d’environ 3. L’ajout de bicarbonate de soude au jus de citron augmentera le pH pour produire une solution plus neutre.

Soins de la peau

Habituellement, la peau a un pH faiblement acide d’environ 5,7. Les bases, comme le bicarbonate de soude, augmentent le pH de la peau. Des niveaux de pH plus élevés peuvent perturber la fonction de barrière de la peau, ce qui peut entraîner une sécheresse, une production excessive de sébum et de l’acné. Le jus de citron semble avoir des applications évidentes en matière de soins de la peau, car il contient des concentrations de vitamine C et d’acide citrique, qui offrent tous deux de puissants avantages pour la peau. L’acide citrique est un acide alpha-hydroxy (AHA) que les fabricants utilisent couramment dans les peelings chimiques. Cependant, les cellules de la peau repoussent naturellement les molécules solubles dans l’eau, comme la vitamine C. Cela signifie que très peu de vitamine C pénètre effectivement dans la peau. La forte teneur en acide du jus de citron peut abaisser le niveau de pH de la peau. Un pH faible peut provoquer une irritation de la peau, une hyperpigmentation et une sensibilité aux rayons UV.

Alternatives

L’utilisation d’un mélange maison de bicarbonate de soude et de jus de citron peut potentiellement être nocif pour la peau. À la place, on peut essayer d’utiliser des nettoyants neutres ou des peelings chimiques qui contiennent des AHA, comme l’acide glycolique.

Neutraliser l’acide gastrique

Les agrumes sont une riche source d’acide citrique. L’excès d’acide gastrique peut provoquer des symptômes inconfortables, tels que des brûlures d’estomac, des vomissements et une indigestion. De nombreuses personnes souffrant d’un excès d’acide gastrique prennent des antiacides en vente libre pour soulager leurs symptômes. Consommer du bicarbonate de soude et du jus de citron ensemble peut également neutraliser l’acide gastrique de la même manière qu’un antiacide. Une étude de 2017 a examiné les effets antiacides de divers aliments. Les auteurs de cette étude ont créé un acide gastrique artificiel avec un pH de 1,2. Bien que le jus de citron en lui-même n’ait presque aucun effet, le bicarbonate de sodium a réussi à neutraliser l’acide gastrique synthétique.

De nombreux antiacides en vente libre contiennent du bicarbonate de sodium et de l’acide citrique. Les citrons et autres agrumes sont de riches sources d’acide citrique naturel.
Lorsqu’une personne mélange du jus de citron et du bicarbonate de soude, l’acide citrique réagit avec le bicarbonate de sodium pour produire un tampon appelé citrate de sodium. Un tampon est un acide ou une base faible qui empêche les changements radicaux de pH. Bien que le jus de citron ne neutralise pas l’acide gastrique, il peut aider à stabiliser le niveau de pH dans l’estomac.

Alternatives

L’utilisation de bicarbonate de soude et de jus de citron pour combattre l’excès d’acide gastrique peut être un bon remède maison, car les antiacides en vente libre contiennent des ingrédients similaires. Cependant, il peut être difficile de mélanger les bonnes proportions de bicarbonate de soude et de jus de citron.

Voici d’autres remèdes maison pour réduire l’excès d’acide gastrique :

éviter ou réduire les aliments et les boissons acides
limiter la consommation de caféine
limiter la consommation d’alcool
manger des repas plus petits
boire plus d’eau
dormir suffisamment.
Les personnes souffrant de reflux acide ou de brûlures d’estomac graves ou persistantes doivent consulter un médecin ou un gastro-entérologue.

Blanchiment des dents

De nombreux produits d’hygiène buccale contiennent du bicarbonate de soude en raison de ses propriétés antibactériennes et de sa capacité à éliminer la plaque dentaire sans éroder l’émail des dents. Le bicarbonate de soude peut également contribuer à éliminer les taches dentaires superficielles, ce qui en fait une alternative efficace et abordable au blanchiment traditionnel des dents. Cependant, il existe peu de preuves suggérant que l’ajout de jus de citron au bicarbonate de soude renforce les avantages dentaires du bicarbonate de soude.

Un rapport de 2017 qui a examiné 21 études a conclu que le dentifrice contenant du bicarbonate de soude éliminait efficacement et en toute sécurité les taches dentaires. Cependant, le rapport n’incluait pas d’études impliquant du jus de citron. Il est également important de noter que le jus de citron contient de fortes concentrations d’acide citrique et d’acide ascorbique, ou vitamine C. Les composés acides peuvent éroder l’émail et entraîner des caries dentaires. Cependant, la combinaison du bicarbonate de soude et du jus de citron devrait produire une solution au pH plus neutre.

Résumé

Les mélanges de bicarbonate de soude et de jus de citron sont des astuces santé populaires. Les gens les utilisent notamment pour les soins de la peau, le blanchiment des dents et le traitement des brûlures d’estomac et des indigestions. Cependant, les preuves scientifiques des bienfaits de ces mélanges sont actuellement limitées, ce qui rend difficile de tirer des conclusions définitives. Le bicarbonate de soude et le jus de citron présentent tous deux plusieurs avantages pour la santé. Cependant, la combinaison de ces deux ingrédients sans dosage spécifique ou directives d’utilisation peut entraîner des effets secondaires indésirables.

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Marie Desange

Marie DESANGE est une journaliste spécialisée dans le domaine de la santé, connue pour son engagement en faveur de l’information précise et accessible dans ce domaine crucial.

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