b12 injection vs oral Vitamin Injections vs. Supplements: Which Works Best? Oral B12 vs. B12 Injections:

Laboratory markers include suppressed free T3 with normal TSH (euthyroid sick syndrome), elevated cortisol, and in severe cases, low LH and FSH indicating hypothalamic suppression

Key Takeaways Yes retatrutide causes some muscle (lean mass) loss, but it is not selectively "eating" your muscle

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A provider will typically: Ask about your symptoms and medical history Request a recent blood test to check B12 levels Evaluate whether injections are appropriate If B12 shots are recommended, the provider can issue a prescription, which you can fill at a local pharmacy or through a telehealth pharmacy that ships to you