Vitaminele si mineralele, esentiale pentru organism

Fara minerale si oligoelemente organismul nu poate functiona, iar vitaminele nu isi pot desfasura activitatea. Organismul uman nu poate produce minerale, astfel incat acestea trebuie procurate din surse externe. In cazul in care mineralele lipsesc din alimentatia noastra, uneori pot aparea probleme grave de sanatate jogos casino online.

Nivelele scazute de magneziu din sange pot reprezenta factori de risc pentru pacientii cu ateroscreloza avansata. Se stie ca deficitul de magneziu din corp constituie un factor de risc pentru ateroscrelozele cerebro-vasculare si complicatiile lor. Studiul a evaluat efectul pe care il are nivelul scazut de magneziu din sange asupra aparitiei evenimentelor neurologice la pacientii cu ateroscreloza avansata.

Au facut obiectul acestui studiu 323 pacienti cu afectiuni vasculare periferice simptomatice, iar dintre acestia 197 erau barbati cu varsta medie de 68 ani. Le-a fost determinata cantitatea de magneziu din sange, monitorizarea durand 20 de luni, urmarindu-se aparitia evenimentelor neurologice, ca ictusul ischemic.

Au fost comparate analizele pacientilor cu nivele ridicate de magneziu (> 0,84 mmol/L), cu cele ale subiectilor care aveau nivelul sub < 0,76 mmol/L, iar acestia din urma prezentau un risc de 3,29 ori mai mare. In concluzie, specialistii recomanda acestor pacienti o terapie substitutiva cu magneziu Bonus Fara Depunere

Cresterea administrarii de folati este asociata cu o reducere a ictusului. Cercetatorii de la Harvard School of Public Health din Boston au examinat relatia dintre administrarea de folati, vitamina B6 si vitamina B12, si riscul de ictus ischemic si hemoragic.

Studiul, desfasurat intre 1986 si 2000, a avut ca subiecti 43.732 barbati, cu varste cuprinse intre 40 si 75 ani, fara afectiuni cardiovasculare si diabet, la momentul recrutarii. In cursul celor 14 ani de follow-up s-au inregistrat 725 cazuri de ictus, dintre care 455 ischemice, 125 hemoragice si 145 de natura necunoscuta.

Administrarea de folati a fost asociata cu un risc minor de ictus ischemic, dar nehemoragic. Riscul relativ de ictus a fost 0,71 pentru pacientii care luau cantitati mai mari de folati fata de cei care luau mai putin, aceasta indicand ca administrarea de vitamine B 6 si B 12 reduce riscul aparitiei afectiunii.

Vitamina E protejeaza contra cancerului, prostata si vezica urinara. Cea de-a 95-a intalnire anuala a Asociatiei Americane pentru Cercetare a Cancerului a fost locul prezentarii rezultatelor a doua studii pe tema vitaminei E, care pare sa aiba efecte protectoare impotriva cancerului de prostata si de vezica urinara.

In primul studiu, cercetatorii de la Institutul National de Cancer, Fred Hutchinson Cancer Research Center si de la Institutul National de Sanatate Publica din Finlanda au descoperit o asociere inversa dintre serum alfa-tocoferol si gama-tocoferolul si riscul de cancer de prostata.

Cele doua substante au in doua din cele opt fractiuni, vitamina E. Studiul a
inclus 300 de participanti, o suta dintre ei fiind diagnosticati cu cancer de prostata. Cercetatorii au descoperit ca nivele inalte de alfa-tocoferol sunt asociate cu reducerea riscului de cancer in proportie de 53%, iar nivele mari de gama-tocoferol reduc acest risc cu 39%.

In cel de-al doilea studiu, cercetatorii de la University of Texas M.D. Anderson Cancer Center si Texas Woman's University au recrutat 468 indivizi cu cancer la vezica urinara si 534 subiecti sanatosi pentru a determina nivelele optime de alfa si gama-tocoferol din dieta.

Ladia M. Hernandez, de la Woman's University, declara "Ratia mare de de viatmina E din dieta reduce cu 42% riscul de cancer de vezica, in vreme ce administrarea de suplimente creste acest procent la 44%".

Deficienta de zinc afecteaza 20% din populatia planetei. Un nou raport intocmit de Grupul International Consultativ pentru Nutritie si Zinc, Universitatea Natiunilor Unite si Asociatia Internationala pentru stiintele Nutritiei au descoperit ca 20% din populatia globului este deficitara in zinc. Acest raport a fost prezentat in cadrul unei intalniri a UN Standing Committee on Nutrition, care a avut loc pe 24 martie 2004.

Printre optiunile enumerate pentru a combate aceasta deficienta a fost inclusa administrarea de suplimente sub forma de tablete sau sirop, implementarea educationala pentru o dieta echilibrata in vitamine si minerale.

Zincul este un mineral esential pentru buna crestere si dezvoltare a copilului. Comentand acest fapt Ken Brown, profesor la Universitatea din Carolina, a spus "datele stiintifice despre deficitul de zinc si importanta acestuia in sanatatea umana au aparut in ultimii ani.

O serie de afectiuni, cum sunt diareea si infectiile respiratorii se reduc prin administrarea de zinc. De asemenea, este evident ca acei copii ale caror mame au luat zilnic un supliment de zinc pe timpul sarcinii, au avut rar diaree in primele luni de viata".

Algele marine sunt o sursa excelenta de saruri minerale, de macro si microelemente, in special iod, mineral care se gaseste din abundenta in apa marilor si oceanelor. Spre exemplu, specialistii francezi de la Institutul de biochimie marina Ifremer, din Nantes, studiaza posibilitatea includerii algelor in alimentatia persoanelor cu deficit de iod.

Pentru continutul mare de calciu, NASA a inclus in dieta cosmonautilor alge,
pentru a contracara decalcifierea provocata de imponderabilitate. Aceste "legume marine" sunt, de altfel, recunoscute pentru proprietatile lor antibacteriene, antivirale, antihemostatice si antiinflamatorii.

Algele sunt bogate in proteine (31 de grame de proteine la 100 de grame de substanta uscata), sarace in grasimi, bogate in fibre alimentare, in calciu, fier, betacaroten. Sunt o sursa rara de vitamina B 12, fara de
care fierul nu se poate asimila in organism.

Tocmai de aceea sunt recomandate persoanelor care sufera de anemie feripriva si vegetarienilor care au o nevoie sporita de vitamina B 12. in plus, algele contin si o serie de polizaharide, care scad nivelul colesterolului si dau senzatia de satietate, avand capacitatea de a hidrata foarte mult (motiv pentru care se recomanda celor care au probleme cu obezitatea sau sunt
supraponderali).

Algele contin atat fibre vegetale solubile - care contribuie la scaderea
colesterolului si a glicemiei, dar si fibre insolubile. Acestea din urma regleaza si accelereaza tranzitul intestinal, prevenind astfel aparitia cancerului intestinal.

Cu ajutorul alginatilor, algele capteaza ionii de fier si de cupru, impiedicand astfel formarea radicalilor liberi cancerigeni in celulele din colon. De altfel, acidul alginic este folosit si pentru decontaminarea radioactiva. De asemenea, o serie de aditivi alimentari (E 400 - E407) sunt extrasi din algele marine.

Nucile si uleiul de masline - bogate in vitamina E - reduc la jumatate riscul aparitiei unui cancer al vezicii urinare, arata un recent studiu american, publicat de Association for Cancer Research. Cercetatorii au descoperit ca, dintre cele doua tipuri de vitamina E - alfa si gama tocoferol - forma alfa este cea care protejeaza vezica impotriva cancerului.

Acest tip se gaseste in special in nuci, migdale, spanac, legumele verzi, piper, seminte de floarea-soarelui si in special in uleiul de masline.
Pentru a beneficia de protectie si pentru a reduce riscul aparitiei unui cancer, nutritionistii recomanda includerea in dieta zilnica a cel putin cinci portii de legume sau fructe proaspete care contin vitamine si substante anticancerigene.

(Sursa: Life Extension Foundation)

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