30, 2026 at 9:08 AM EDT | Functional medicine doctor Katherine Birchenough and nutrition coach Sarah Wilson explain the internal sunscreen trend, how plant pigments and certain nutrients may build up in skin and help reduce UV-related damage
More noticeable benefits like improved mood, mental clarity, and better sleep typically develop with regular treatment
Working with knowledgeable practitioners helps ensure compliance with applicable regulations
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Common forms: tablet, capsule, liquid, sublingual, nasal, injection Common reasons for different dosing: prevention, confirmed deficiency, absorption problems, product strength, and medical supervision Important point: prescription products and over-the-counter supplements may have different intended uses Who may need medical guidance before taking vitamin B12 Many adults can use standard over-the-counter vitamin B12 products as directed on the label, but some people should speak with a clinician first