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Both vitamin B12 deficiency and folate deficiency are more common in older people, affecting around 1 in 10 people aged 75 or over and 1 in 20 people aged 65 to 74
doi: 10.1186/ar3685 39 van KuijkAWVergunstCEGerlagDMBresnihanBGomez-ReinoJJRouzierRet al
Genetic polymorphisms in glutathione S-transferase enzymes (GSTM1-null, GSTT1-null) affect 4060% of some populations and increase vulnerability to toxins and oxidative stress-related diseases
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