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Usage: Apply to wet hair and massage into the scalp

Last reviewed: May 12, 2026 Last updated: May 12, 2026 Written by: Jay Hastings , CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations

Interactions: Inform patients that certain drugs (antibiotics, methotrexate) can affect B12 testing, but generally B12 injections have no major drug interactions

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While not hair-specific, their systemic regenerative effects may support overall follicle health, particularly following scalp trauma or procedures