Foliumzuur tegen slechthorendheid*
Uit een Australische studie onder drieduizend senioren blijkt dat goede bloedwaarden
foliumzuur belangrijk zijn in het voorkomen van
gehoorverlies bij het ouder worden. Bloedwaarden foliumzuur lager dan 5 ng/ml (11 nM/l) geeft 34% meer kans op gehoorverlies. Hoge homocysteïnewaarden geven meer dan 60% meer kans op gehoorverlies. Eerder onderzoek heeft al laten zien dat lage bloedwaarden aan B-vitamines zoals foliumzuur hoge
homocysteïnewaarden tot gevolg hebben.
Age related hearing loss halted with folate nutrient
Now a new study, dubbed the Blue Mountains Hearing Study and headed by scientists at the University of Sydney in Australia, has revealed yet another important link between folate and hearing. The researchers found that when people have low levels of the B vitamin in their blood, they have a significantly increased risk of hearing loss. The research was recently published in The Journal of
Nutrition.
The study, which involved researchers from several Australian universities, looked at 2,956 people age 50 and up. Blood levels of vitamin B-12, folate and homocysteine were measured and then compared to the amount of hearing loss in the research subjects. The results? People with low levels of folate (below 11 nanomoles per liter) had a 34% increased risk of hearing loss.
What's more, elevated levels of the amino acid homocysteine (over 20 micromoles per liter) were linked to a 64% increase in the risk of hearing loss. Excess levels of homocysteine have previously been associated with an increased risk of heart disease and memory problems. Too much homocysteine is also believed to disrupt normal blood flow to the inner ear -- which could possibly explain the homocysteine and hearing loss connection. And a body of earlier research has concluded adequate B vitamin levels are associated with normal homocysteine levels in the blood.
(Januari 2011)
Reacties:
