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    GlossarySkin Penetration

    process by which substances pass through the outer skin layer

    Skin penetration refers to the process by which substances pass through the outermost layer of the skin, known as the stratum corneum, to reach deeper layers. This is a critical concept in dermatology and pharmacology, as it influences the effectiveness of topical medications and skincare products. Factors such as molecular size, solubility, and the condition of the skin can affect how well a substance penetrates.

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      community Topical dutasteride significantly outperforms oral finasteride

      in Research/Science  65 upvotes 6 months ago
      Topical dutasteride 0.05% is reported to outperform oral finasteride with minimal side effects, but concerns about study bias exist due to company funding. Some users report mixed results with topical dutasteride, noting issues with skin penetration and systemic absorption.

      community Self-Experiment - Topical Rapamycin or a-KB

      in Treatment  5 upvotes 4 years ago
      A user plans to create a DIY topical treatment for hair loss using Rapamycin, possibly combined with alpha-ketoglutaric acid (a-KG). They discuss the concentration and formulation process for Rapamycin, considering safety and skin penetration, and intend to apply it every other day to the scalp.