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    1. Microneedling Technique that makes tiny punctures in the scalp with fine needles
    2. Tretinoin Vitamin A retinoid cream, prescribed for acne
    3. Biotin B vitamin, often sold as a hair supplement
    4. GHK-Cu Copper peptide used in skin and hair cosmetics
    5. Vitamin D Vitamin made in the skin from sunlight, also taken as a supplement