La carence en vitamine D sous les projecteurs depuis la pandémie.
La « vitamine D » a fait les gros titres depuis le début de la pandémie du virus Corona. De nombreux articles scientifiques et spécialisés ont été publiés sur les avantages de cette vitamine unique et sa capacité à lutter contre le virus. La plupart des études ont lié un manque de vitamine D à un risque accru d’infection par le coronavirus.
Une carence en vitamine D largement répandue.
Plusieurs études ont montré que, même si les gens sont conscients de l’importance de cette vitamine, beaucoup en manquent encore. Une étude menée sur 4 495 adultes américains a révélé qu’environ 42 % d’entre eux souffrent d’une déficience en vitamine D.
Les 4 grands dangers liés à une carence en vitamine D.
1. Risque accru de cancer.
La carence en vitamine D peut exposer à un risque plus élevé de développer différents types de cancer.
Cela peut arriver même en l’absence d’antécédents familiaux ou d’exposition à des facteurs de risque.
La raison ? Une mauvaise réponse immunitaire liée au faible taux de vitamine D, favorisant l’apparition de tumeurs malignes.
2. Vulnérabilité face aux maladies.
La vitamine D est étroitement liée au bon fonctionnement du système immunitaire.
Quand elle est insuffisante, le système devient faible et inefficace.
Elle joue un rôle essentiel dans l’homéostasie des lymphocytes T en augmentant les cellules T régulatrices.
Ces cellules permettent de maintenir un système immunitaire sain.
Elle stimule également une protéine connue sous le nom de cathélicidine, qui aide à combattre les infections.
3. Fatigue persistante et douleurs corporelles
Certaines personnes ressentent une fatigue inexpliquée, sans effort physique ou mental particulier.
Cela peut s’expliquer par une carence en vitamine D. Cette vitamine est cruciale pour la santé des os et la force musculaire. Elle aide aussi à réduire l’inflammation, ce qui calme les douleurs et atténue la fatigue. En plus, la vitamine D est un régulateur central de nombreuses hormones. Il n’est donc pas étonnant que son absence entraîne fatigue et courbatures.
4. Un danger pour le cœur.
Les maladies cardiaques sont la première cause de décès dans le monde.
Selon les recherches, une carence en vitamine D pourrait y jouer un rôle important.
Le cœur a besoin de cette vitamine pour améliorer l’absorption des électrolytes dans le muscle cardiaque.
Une revue publiée en 2018 dans la revue Clinical Hypertension a montré que de faibles niveaux de vitamine D sont liés à : La mortalité accrue liée aux maladies cardiovasculaires et une tension artérielle plus élevée.
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