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GlossaryPhotodegradation

...breakdown of materials by exposure to light, especially UV

Photodegradation is the process by which materials are broken down or degraded by exposure to light, particularly ultraviolet (UV) radiation. In the context of hair, photodegradation can lead to the weakening of hair fibers, loss of color, and overall damage due to prolonged sun exposure. This process involves the absorption of light energy, which can cause chemical bonds within the material to break, leading to structural and compositional changes.

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Research

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research About photo-damage of human hair

66 citations , September 2005 in “Photochemical & photobiological sciences”

We don't fully understand how sunlight damages different types of hair.

research Photodegradation of human hair: a microscopy study

7 citations , January 2001 in “Comprehensive series in photosciences”

UV radiation significantly damages hair, especially with humidity, making it more vulnerable to further damage.

research Photodegradation of hair of different ethnicity after 1 year of exposure to natural weathering in Arizona

March 2007 in “International Journal of Cosmetic Science”

Hair with more melanin resists weather damage better.

research Flexabrasion Applied to the Evaluation of the Photodegradation of Hair Fibers

December 2021 in “Cosmetics”

research Photochemical alterations in human hair. I. Artificial irradiation and investigations of hair proteins

27 citations , January 1995

Melanin in black hair protects it from sun damage better than light-brown hair.

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Community Join

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community Does pyri/kx826 degrade in exposure to bathroom light?

in Treatment 5 upvotes 1 year ago

The conversation discusses concerns about RU58841 degrading when exposed to light and transferring pyri to a dark glass bottle to prevent this. The user keeps the pyri out for only two minutes before storing it in a dark place.

community Finasteride solution changing colors

in Finasteride/Dutasteride 1 upvotes 3 days ago

A user noticed a color change in their hair loss solution containing minoxidil, finasteride, retinoic acid, and hydrocortisone after storing it for several months. They are concerned about the effectiveness of the solution due to potential oxidation.

community Pyrilutamide solution question

in Research/Science 8 upvotes 3 years ago

The conversation is about the stability of pyrilutamide in different solutions. The user is asking if a 70/30 ethanol/pg solution with 4% water will degrade pyrilutamide.

community Results from 272 diode Red Light Therapy hat exclusively.

in Is this regrowth? 246 upvotes 2 months ago

A user reported noticeable hair regrowth using a 272 diode red light therapy hat over 11 months without Minoxidil or Finasteride. Opinions vary on its effectiveness compared to traditional treatments, with some suggesting combining therapies for better results.

community Verteporfin update - Dr Barghouthi finishes another case

in Research/Science 19 upvotes 2 years ago

A hair restoration case involved injecting four different doses of Verteporfin into the mid scalp and using Scalp MicroPigmentation (SMP) around the extraction areas. Photos were taken and an update will be shared soon.

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