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Glossarypermeation

movement of substances through a membrane or porous material

Permeation refers to the process by which a substance, such as a liquid or gas, passes through a porous material or membrane. In the context of hair and scalp treatments, permeation is crucial for understanding how active ingredients in topical products penetrate the skin and hair follicles to exert their effects. This process is influenced by factors like the molecular size of the substance, the properties of the membrane, and the presence of enhancers that facilitate deeper penetration.

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Research

5 / 1000+ results

research Permeation of topically applied caffeine through human skin – a comparison of in vivo and in vitro data

82 citations , May 2009 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology”

Caffeine penetrates human skin in lab tests similarly to real-life conditions, but actual skin use is still essential for accurate results.

research Ion pairs of risedronate for transdermal delivery and enhanced permeation rate on hairless mouse skin

34 citations , July 2011 in “International journal of pharmaceutics”

Ion-paired risedronate significantly increases skin penetration without irritation compared to risedronate alone.

research Skin Penetration and Permeation Properties of Transcutol® in Complex Formulations

29 citations , September 2024 in “AAPS PharmSciTech”

Transcutol® helps drugs penetrate the skin more effectively in various formulations.

research Permeation of topically applied Magnesium ions through human skin is facilitated by hair follicles

20 citations , June 2016 in “Magnesium research”

Hair follicles help magnesium get through the skin more effectively.

research Skin permeation of curcumin nanocrystals: Effect of particle size, delivery vehicles, and permeation enhancer

15 citations , February 2023 in “Colloids and surfaces. B, Biointerfaces”

Smaller curcumin nanocrystals penetrate skin better, but additives and particle size affect absorption and accumulation.

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community Oral Supplementation of Nicotinamide Mononucleotide (NMN) Improves Hair Quality and Subjective Perception of Hair Appearance in Middle-Aged Women

in Update 2 upvotes 10 months ago

Oral supplementation of Nicotinamide Mononucleotide (NMN) improves hair quality and appearance in middle-aged women. However, it may reduce total hair density, possibly due to seasonal shedding.

community Anybody on here from Germany who can talk to us about alfatradiol (Avicis, Avixis, Ell-Cranell Alpha and Pantostin)? Availability, public perception, etc?

in Treatment 5 upvotes 4 years ago

Hair loss treatments discussed include Minoxidil, Finasteride, and RU58841. A user asks about alfatradiol's availability, public perception, and usage in Germany.

community Are a lot of men already losing their hair at 25?

in Chat 153 upvotes 2 years ago

The conversation discusses the perception of increased hair loss among young men, with some attributing it to heightened awareness or environmental factors. Various treatments are mentioned, including Minoxidil, Finasteride, microneedling, scalp massages, and future hair transplant methods.

community Hair Loss and Its Immense Impact on Appearance

in Chat 159 upvotes 3 months ago

Hair loss significantly impacts self-perception and attractiveness, with treatments like finasteride, minoxidil, and hair transplants suggested. The conversation highlights the emotional struggle and societal perceptions tied to hair loss.

community Why the Brain Resists Updating Your Appearance: The Neuroscience Behind “It Happened Overnight”

in Research/Science 6 upvotes 6 months ago

The brain resists updating its perception of gradual appearance changes, like hair loss, due to its preference for stability and reliance on an internal model. This delay in perception can make changes feel sudden once the brain finally updates its model.

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