They can figure out the risk of B12 deficiency and suggest the right supplements for you
Gentle, low-impact activity like walking, cycling, and swimming can help reduce muscle pain and improve muscle strength
doi:10.1038/nrcardio.2015.2 Habib A, Petrucci G, Rocca B
But for patients who have done the foundational work diet, movement, sleep, lab optimization and are still hitting a wall with fat metabolism or body composition, it may be a worthwhile piece of the puzzle
A 2012 review of all known studies determined that daily B12 losses in apparently healthy adults and elderly range from 1.4 to 5.1 g (Doets, 2012)
Cutting Through the Marketing Spin B12 and MIC B12 injections aren't miracle workers