bow much b12 to inject qwekly Injection Dosage and Frequency: 7 Guidelines for Adults Vitamin B12 Dosages: Your GoodRx
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Science 288 , 23792381 (2000)

Even if you carry your American prescription bottle and documentation from your US physician, Mexican pharmacies are legally required to have a Mexican prescription on file
The Journal of clinical endocrinology and metabolism , 96 (1), 150158
Nerve changes from a prolonged B12 deficiency can affect coordination and balance, leaving some people feeling unsteady, dizzy, or more prone to stumbling

Yes, just like your body needs nutrients to function, your hair does too
