Explication des vitamines A et vitamines D

Les vitamines A et D sont des éléments nécessaires pour la santé de notre organisme et à notre survie. Une carence de l’une ou l’autre dans notre organisme peut ainsi engendrer des lésions. Quels sont les rôles des vitamines A et des vitamines D dans notre corps ? Comment approvisionner notre organisme ? Voici ce qu’il faut savoir.

La vitamine A

La vitamine A n’est pas une entité qui se trouve naturellement dans notre corps. En d’autres termes, il nous faut lui en procurer de l’extérieur. Elle est une substance organique non calorique qui est indispensable à notre métabolisme. Cette substance est soluble dans la graisse et peut être stockée dans les tissus adipeux, c’est-à-dire le tissu qui regroupe les cellules graisseuses qui forment le tissu conjonctif. Il existe deux types de vitamine A à savoir les caroténoïdes et le rétinol.
La vitamine A à des dérivés qui jouent des rôles importants pour notre santé. Il y a par exemple le rétinal qui agit essentiellement sur la vision. Il est le principal élément qui forme le pigment des cellules en forme de bâtonnets de la rétine. Ces bâtonnets sont à l’origine de la vision noir et blanc crépusculaire. La cornée rétinienne est ainsi un grand consommateur de vitamine A. Puis il y a aussi le célèbre bêta-carotène qui se trouve être un excellent antioxydant. Il intervient principalement au niveau de la peau en lui permettant de se protéger contre les effets des rayons UV.

La vitamine D

La vitamine D est un nutriment dont la présence est cruciale pour le bien-être de notre organisme. Elle est plus connue pour ses bienfaits sur les os, ce qui fait d’elle l’un des suppléments alimentaires les plus réputés. La vitamine D est responsable de l’absorption du calcium et du phosphore dans le corps permettant ainsi de limiter leur dissolution par les reins. Elle tient également un rôle fondamental sur la régénération de la masse osseuse, la production d’hormones de croissance ou encore d’hormones sexuelles. Des recherches ont même pu déceler que la vitamine D peut aider à prévenir d’éventuels cancers.

Importance des compléments alimentaires

Parce que le corps et l’organisme ne produisent pas naturellement de la vitamine A et de la vitamine D, il est conseillé d’en consommer. Parce que notre quotidien ne nous permet pas toujours de pratiquer une alimentation saine et notamment par la prise régulière d’aliments qui continent les deux types de vitamines, opter pour les compléments alimentaires peut être une excellente option. Cela permettra en effet de combler certaines carences que notre corps peut subir.

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