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Heres a breakdown of the cost difference: B12 Injection Kits: Initial purchase of the kit Cost of syringes and needles (if not included) Ongoing expense for B12 solution Potential additional costs for education or training Professional B12 Injections: Cost of each clinical visit Possible additional fees for medical consultation Travel expenses to and from the clinic While B12 injection kits may have a lower upfront cost, the cumulative expense over time may be comparable to or even higher than professional injections, depending on your specific needs and the frequency of injections

Lee, M.-J., Wu, Y

PMID 11325542

The final concentration of HGF in media was set at 5 ng/ml, which has been shown to maximally activate satellite cells in our primary culture system 19