In het artikel B12 deficiency: a silent epidemic with serious consequences wordt nader in gegaan op geconstateerde B12-tekorten.
Gezien het geringe percentage vegetariërs (ongeveer 3%) onder de bevolking (die vaak juist wèl op hun B12 letten), moet er dus een substantieel deel van de niet-vegetariërs zijn met een B12-tekort.However, B12 deficiency is far more common than most health care practitioners and the general public realize. Data from the Tufts University Framingham Offspring Study suggest that 40 percent of people between the ages of 26 and 83 have plasma B12 levels in the low normal range – a range at which many experience neurological symptoms. 9 percent had outright deficiency, and 16 percent exhibited “near deficiency”. Most surprising to the researchers was the fact that low B12 levels were as common in younger people as they were in the elderly.
That said, B12 deficiency has been estimated to affect about 40% of people over 60 years of age. It’s entirely possible that at least some of the symptoms we attribute to “normal” aging – such as memory loss, cognitive decline, decreased mobility, etc. – are at least in part caused by B12 deficiency.
Why is B12 deficiency so under-diagnosed?
B12 deficiency is often missed for two reasons. First, it’s not routinely tested by most physicians. Second, the low end of the laboratory reference range is too low. This is why most studies underestimate true levels of deficiency. Many B12 deficient people have so-called “normal” levels of B12.
Dus als een vleeseter aan mij vraagt of ik wel op mijn B12 let, dan is mijn antwoord :
"Let jij wel op je B12 ?!"