b12 injections gray hair China's Reversing Spark Controversy Can Vitamin B12 Reverse Premature
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Fish: Salmon, Tuna and sardines are high in vitamin b12

All controlled studies referenced below were conducted in cell culture (3T3-L1 adipocytes, primary muscle stem cells) or rodent models (diet-induced obese mice, aged C57BL/6J mice)

For women of reproductive age, this can lead to irregular periods, heavy bleeding, and, in some cases, infertility

This is what's known as a "functional" deficiency

Perhaps most telling, researchers tested for anti-AOD 9604 antibodies at multiple timepoints throughout the trials