BETTER THAN RETATRUTIDE
Groups at higher risk of deficiency include older adults (due to reduced stomach acid production), people following vegan or strict vegetarian diets (as B12 is naturally found almost exclusively in animal products), individuals with pernicious anaemia or other malabsorption conditions, those taking certain medications such as metformin or proton pump inhibitors long-term, and people with significant nitrous oxide exposure (including recreational use), which can inactivate B12 in the body
10.1128/JB.00271-08 Brenot A, King KY, Janowiak B, Griffith O, Caparon MG: Contribution of glutathione peroxidase to the virulence of Streptococcus pyogenes
We have measured and compared fermentation efficiency in each of the deletion, control, and a number of beer brewing strains
However, not everybody lives a healthy lifestyle and eats a balanced diet