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Causes of Vitamin B12 Deficiency Inadequate dietary intake Malabsorption disorders Insufficient stomach acid Surgical procedures Autoimmune conditions Medications Age-related factors Inadequate dietary intake Vitamin B12 is found only in animal products such as eggs, meat, fish, and dairy products, but vegans and vegetarians do not consume animal products, therefore it is easy to develop vitamin B12 deficiency
V plazme mladych dospelych se meri priblizne 200 ng/mL (asi 10^-7 M), do sesteho decenia zivota tato hodnota klesa na priblizne 80 ng/mL (Pickart et al., 2015)
In recent years, skin AGE measurement can be performed with specially developed ultrasonic devices as an indicator of increased oxidative damage
GHK-Cu is reported to influence a large number of genes and to accelerate epithelialization in wound models, but these findings describe biological activity, not a validated human safety margin