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With the lack of any FDA regulation or oversight of peptides, anyone can get in the business
Microneedling is more widely available, more extensively studied for hair loss, and can be done at home (with shorter needles)
While oral substitutes have shown some effectiveness according to studies, their ability to match the efficacy of intramuscular vitamin B12 remains uncertain
Also, most supplements are well below the upper limit
Here are the protocols supported by current research and clinical observations
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