can you order b12 injections online MIC Protocol | from $99/mo Buy Methylcobalamin B12 Injections Online

While that initial boost is great, the real goal is to maintain your B12 levels over time so you can enjoy sustained energy and focus without the ups and downs

Vitamin B12 deficiency can also be found in people with poor nutrition, pernicious anemia, infection, cancer, surgery, alcohol, medications (PPIs or other acid-suppressing drugs), exposure to nitrous oxide (during surgery or recreational use), stomach/intestinal problems such as intestinal dysbiosis, leaky gut or gut inflammation, atrophic gastritis or hypochlorhydria (low stomach acid) and/or nerve damage

Sources: Hangovers - Symptoms and causes | The Mayo Clinic Drug Bioavailability - StatPearls | NCBI Bookshelf

If you've been taking high doses for months, it's smart to check your levels once in a while