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Hair quality depends on multiple nutrients working together B12, iron, biotin, zinc, vitamin D, folate, and adequate protein

However, its still best to supplement under medical guidance [*]

Takeaway Vitamin B12 doesnt make you gain weight

Deficiency symptoms often manifest as hair thinning, brittle texture, and premature greying, as B12 is necessary for melanin production in hair follicles

Avoid products making exaggerated health claims or those containing unnecessary additives

"Comparative Bioavailability and Utilization of Particular Forms of B12 Supplements With Potential to Mitigate B12-related Genetic Polymorphisms", Integrative Medicine: A Clinician's Journal (Encinitas)