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Vitamin B12 helps promote hair growth by improving blood circulation to the scalp

doi: 10.1093/ajcn/12.2.145

The Vitamin Shoppe Vitamin B12 Soft Chews (out of stock): These B12 chews from the Vitamin Shoppe offer a convenient, less messy alternative to liquid supplements, delivering 2,500 mcg of methylcobalamin per serving

Per milligram costs vary by supplier and vial size, but expect to pay less than growth hormone secretagogues and more than basic amino acid compounds

If you are also low in iron, B12 alone will not fully resolve anemia, which is why comprehensive blood work helps

If you used something other than BAC water (like saline), the salt concentration might be causing precipitation