are b12 sprays effective as injections Oral Spray vs Injections: Which is Right for You? Sublingual B12 vs. B12 Injections:
Description
Doctors and health media focus almost entirely on B12 deficiency, so seeing a number flagged as high can feel unexpectedly alarming

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doi: 10.1080/19420862.2022.2095949

It's important to note that while NR is generally recognized as a dietary supplement in the US, the FDA has indicated that NMN is excluded from the dietary supplement definition
