Proton pump inhibitors and similar medications that lower stomach acid might decrease the absorption of vitamin B12 from food, but this is less of a concern when receiving B12 injections because they bypass the digestive system entirely
Within the first day or two, the vitamin is absorbed into your bloodstream, and your cells finally get the supply they were missing
Thiamin supplements may also help for people who experience: malabsorption syndrome severe, prolonged vomiting gastric bypass surgery renal replacement therapy hyperthyroidism People who are pregnant, lactating, or use diuretics may also benefit from vitamin B1 supplements
How quickly will I feel better after a B12 injection
For those unable to get enough B12 from their diet or oral supplements, injections offer a highly effective alternative
Store at controlled room temperature of 20 to 25 degrees celsius (68 to 77 degrees fahrenheit)