el3olama2 beyhaweloo ye3rafo ezay el7agat bet2asar 3ala masha3erna. el7ala elmezageya beta3tak bet7akam fiha 7agat ketir, zay shakhseyetak w tasarofat elnas eltanya. yemken makunsh 3aref en el ta2s momken ye2asar 3ala masha3erna bardu.

elnas dayman bet2ool enhom beyeb2o mabsootin lama elshams bet3od w za3lanin lama eldonia bet3ayem. fel7a2i2a, daw2 elshams beykhalina ne7es kwayes. lama daw2 elshams beyedrab 3ala geldena, gesmena beysana3 vitamin D. vitamin D beysa3ed gesmena yesana3 mawad kimawya khasa. elmawad di bet2asar 3ala dema8na w betkhaleena ne7es bel sa3ada. masalan, fi Sweden w Norway fi sheta tawil w dolamm w shams alila, 3ashan keda nas ketir fi elbelad di dayman za3lana. 3ashan yesa3do elnas di ye7eso a7san, el3olama2 bano owd khasa "sunrooms" 3ashan elnas teroo7 w takhod "daw2 shams" sa3a aw etnen!

elta2s momken ye2asar 3ala masha3er elnas be toro2 tanya. elga7 momken yekhalii elnas tet3aseb 3ashan elnas mabte7esh bra7a lama beyeb2a 7ar. nafs el7al, elsheta momken tekhalii elnas tet3aseb 3ashan lama 7ad yetbal beyeb2a za3lan. zay ma enta shayef, elta2s momken ye2asar 3ala elmawad elkimawya elli bet7akam fel masha3er beta3tna. bel tari2a di, elta2s beye2asar 3ala masha3erna. lel2asaf, ma3 en elta2s ye2dar ye8ayar fina, e7na manedarch ne8ayar fel ta2s.
anhi gawab sa7 3an vitamin D 7asab elmakala?
da no3 men el2akl elkhas. beykhaleena nel2ala2 3an tari2 elta2sir 3ala dema8na. beysa3ed gesm el2ensan. mawgood fi daw2 elshams.