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Description
Protective mucosal and systemic immunity induced by virus-like particles expressing Toxoplasma gondii cyst wall protein
Now there are some reasons why b12 alone can help with metabolism but they are more subtle and likely only going to work if you have an actual deficiency

Xpd TTD/TTD is pleiotropic model for aging that can be effectively used as a basis for such research

Telomere shortening is associated with aging and cellular senescence
