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May help boost metabolism and reduce fatigue.

Vitamin B12 (cobalamin) is essential for red blood cell formation, DNA synthesis, and nervous system maintenance, obtained exclusively through diet or supplementation

These injections can help prevent conditions like heart disease, vision loss, neurocognitive disorders, peripheral neuropathy, and infertility, among others

Both compounds share one important profile characteristic: neither elevates IGF-1 levels, which separates them from full-length HGH and substantially reduces cell proliferation risk in research models

In people with normal absorption, deficiencies have been reported only in strict vegetarians who consume no products of animal origin (including no milk products or eggs)