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For vegetarians, vegans, and people with digestive issues, getting enough B12 can be a challenge
*The schedule may vary depending on the season and weather conditions, so it is very important to reconfirm the day before the tour
Circulating levels decline with agefrom ~200 ng/mL at age 20 to ~80 ng/mL by age 60correlating with decreased regenerative capacity
While a balanced diet or oral supplements are often sufficient for maintaining adequate B12 levels, certain conditions may necessitate vitamin B12 injections
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