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GlossaryCysteic Acid

compound formed when cysteine oxidizes, indicating hair damage

Cysteic acid is a compound that forms when the amino acid cysteine undergoes oxidation. In the context of hair, it can result from chemical treatments like bleaching or perming, which can damage the hair's protein structure. For professionals, it's important to note that the presence of cysteic acid indicates oxidative stress and potential weakening of the hair fiber.

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research Effect of Disulfide Bonds in Human Hair Fibers on the Melting Behavior of Their Crystalline Structure

March 2010 in “International Journal of Cosmetic Science”

Disulfide bonds affect the melting behavior of hair's crystalline structure, but hair retains some stability even after these bonds are broken.

research Effect of Disulfide Bonds in Human Hair Fibers on the Melting Behavior of Their Crystalline Structure

1 citations , January 2009 in “Journal of S C C J”

Changing disulfide bonds in human hair affects its melting behavior and thermal stability.

research Distribution and Localization of Hydrophobic and Ionic Chemical Groups at the Surface of Bleached Human Hair Fibers

36 citations , October 2014 in “Langmuir”

Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.

Exploring the Effects of Wetting and Free Fatty Acid Deposition on a Hair Fiber Surface Model Incorporating Keratin Associated Protein 5-1

research Exploring the Effects of Wetting and Free Fatty Acid Deposition on a Hair Fiber Surface Model Incorporating Keratin Associated Protein 5-1

November 2022

Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.

research Structural Investigation on Damaged Hair Keratin Treated with α,β-Unsaturated Michael Acceptors Used as Repairing Agents

5 citations , December 2020 in “International journal of biological macromolecules”

Treatments improved hair surface and scale structure but didn't increase certain bonds in the hair cortex.

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community Finally Scalp Folliculitis-Free after 2 Decades of Suffering

in Treatment 64 upvotes 1 year ago

A 37-year-old male resolved scalp folliculitis by adopting a low-histamine diet and taking Vitamin A, Zinc, and Fish Oil, leading to better skin health and thicker hair. He warns about the potential toxicity of excessive Vitamin A intake.

community Fighting Hair loss AND Grey Hair

in Treatment 20 upvotes 3 years ago

The user is treating hair loss with topical Minoxidil, Finasteride, RU58841, microneedling, and Ketoconazole. For grey hair, they use L-Cysteine, L-Methionine, and PABA, and have noticed some re-pigmentation.

community Derma Harmony Sulfur/salicylic acid soap bar shampoo, it caused major hair loss shedding and oily scalp with acne breakout

in Product 2 upvotes 6 months ago

The Derma Harmony Sulfur/Salicylic acid soap bar shampoo caused significant hair shedding, oily scalp, and cystic acne. The user experienced better results with rosemary shampoo.

community Fighting Hair loss AND Grey Hair

in Treatment 2 upvotes 3 years ago

OP is exploring ways to stop or reverse greying hair, using NAC and considering PABA supplements. Some users suggest hair dye, black strap molasses, and copper as potential solutions.

community Anything you use without scientific backing, just trusting your gut?

in Research/Science 13 upvotes 3 years ago

The conversation discusses using peppermint oil for hair loss, with one user applying it undiluted to the scalp and another combining it with finasteride and microneedling. Some believe in its effectiveness despite limited scientific evidence, and also mention rosemary oil as potentially beneficial.

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