--- title: "Skin absorption profiling" description: "Measure ingredient absorption and recovery in skin studies." image: "https://cosmetic-labs.com/wp-content/uploads/skin-absorption-service-1200x1200-1.webp" --- # Skin absorption profiling > Measure ingredient absorption and recovery in skin studies. Source: https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/skin-absorption Created: 2025-04-14T23:59:43+00:00 Modified: 2026-10-25T11:23:06+00:00 Author: Emilie SCHOL Skin absorption profiling | Cosmetic Labs ## What is Skin absorption profiling? Quantities remaining on the surface, retained in skin or permeating through it, with recovery and mass balance. ### Why do you need this service? Use skin absorption profiling to compare retained and permeated analyte under defined exposure conditions. Model integrity, sampling, analytical recovery and relevant skin compartments determine the interpretation. The profile does not establish an exact penetration depth or delivery to the dermis within a standard time, and it does not alone prove efficacy. ## Be the first company on this service page No published company profiles are linked to Skin absorption profiling or its more specific services yet. Explore the service categories or add an explicitly supported capability to your company profile. [List your company](https://cosmetic-labs.com/account/companies/new) Definition ## Skin absorption profiling An absorption study asks how much of an applied substance remains on the surface, is retained within the tested skin preparation or passes through it. The definitions used for absorbed material should be stated explicitly, especially when results will inform systemic exposure estimates. ### Model and sampling plan Excised human or other justified skin preparations may be mounted in diffusion systems. OECD Test Guideline 428 provides a framework for in vitro skin absorption studies. Synthetic-membrane release testing does not substitute for a biological skin absorption study. Documented skin source, preparation and barrier integrity - Application conditions representative of the intended exposure - Collection of receptor fluid and relevant wash fractions - Extraction of retained analyte from defined tissue compartments - Mass-balance assessment and suitable analytical sensitivity ### Interpreting the profile Outputs can include time-dependent permeation, retained amounts and comparisons between cream, gel or serum vehicles. Layer-specific data require appropriate separation methods. A measured fraction in receptor fluid is not a direct measure of clinical bioavailability at a biological target. Results can inform a toxicological assessment and identify how formulation changes alter exposure. Their relevance depends on the test conditions and model, and they do not alone establish efficacy, universal regulatory acceptance or a safe use concentration. Applications ## How skin absorption profiling is used in product development Skin absorption profiling compares surface residue, skin-retained material and permeated amounts under defined application conditions. ### Comparing formulation vehicles Franz cell diffusion studies can track analyte collected in receptor fluid over time. Analysis of wash fractions and extracted tissue supports recovery and mass-balance assessment. Tape stripping can add information about stratum-corneum deposition, while deeper layer measurements require appropriate tissue separation. Labs can compare liposomes, microspheres, emulsions and penetration enhancers to investigate changes in retention and permeation. Effects of particle size or carrier choice must be measured for the tested ingredient and formulation rather than assumed from a generic percentage improvement. ### Exposure assessment and documentation Absorption data can inform systemic exposure estimates within a toxicological assessment. Calculating a margin of safety also requires relevant toxicological inputs and explicit exposure assumptions. An absorption profile alone does not establish a safe use concentration. Leave-on, rinse-off and sun-care studies need application conditions suited to intended use. Regulatory data needs depend on the ingredient, product category, market and assessment question. The study does not guarantee registration or FDA approval. ExplorationLearn more about Skin Absorption StudiesChoose cosmetic penetration and delivery studies by your question: skin uptake, layer distribution, comparative delivery or release over time. Explore another Skin Absorption Studies page on cosmetic-labs.com. #### [Ingredient Release-Rate Studies](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/time-release) Measure ingredient release over time from a cosmetic formula or carrier, with release profiles kept distinct from duration of clinical product effects. [Check this service](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/time-release) #### [Franz cell diffusion testing](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/franz-cell) Measure ingredient transfer across a selected membrane with Franz diffusion cells, specifying whether the study addresses skin permeation or release. [Check this service](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/franz-cell) #### [Tape stripping analysis](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/tape-stripping) Measure material recovered from successive stratum corneum tape strips to compare superficial deposition, without inferring exact depths or dermal uptake. [Check this service](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/tape-stripping) #### [Skin layer distribution](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/skin-layer) Skin layer distribution services for cosmetic formulas. Tape stripping, HPLC, and confocal microscopy map ingredient concentration from surface to dermis. [Check this service](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/skin-layer) #### [Active delivery assessment](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/active-delivery) Compare ingredient availability or localisation from carriers, defining the delivery question separately from absorption and distribution studies. [Check this service](https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/active-delivery) Continue with [Google](https://cosmetic-labs.com/?lean_auth=start&provider=google&redirect_to=https://cosmetic-labs.com/&error_return=https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/skin-absorption) [LinkedIn](https://cosmetic-labs.com/?lean_auth=start&provider=linkedin&redirect_to=https://cosmetic-labs.com/&error_return=https://cosmetic-labs.com/services/in-vitro-testing/cosmetic-quality-testing/penetration-studies/skin-absorption) What does “Verified” mean? Verified means the claimant’s company affiliation was checked. Something not right?Let us know if any information on this page is incorrect or if you have concerns about who manages it. [Report an issue](https://cosmetic-labs.com/platform/contact) © 2026 Cosmetic Labs. 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