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GlossaryTensile Strength

maximum stress a material endures before breaking when stretched

Tensile strength, also known as ultimate tensile strength (UTS), is the maximum amount of stress a material can withstand while being stretched or pulled before breaking. In the context of hair, it refers to the force required to break a strand of hair when it is pulled from both ends. This property is crucial for understanding the durability and resilience of hair fibers, which can be affected by factors such as chemical treatments, environmental exposure, and overall hair health.

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research Bleached Hair as a Standard Template to Evaluate the Performance of Commercial Hair Repair Products

August 2024 in “Cosmetics”

K18® and Olaplex® both effectively repair bleached hair, improving its strength, smoothness, and overall health.

research Rapunzel! Rapunzel! How Strong Is Your Hair?

January 2020 in “Matter”

Hair can't be as strong as Rapunzel's because it's impractical to scale up due to defects.

research Single Hair Fiber Assessment Techniques to Discriminate Between Mineral Oil and Coconut Oil Effect on Hair Physical Properties

3 citations , September 2020 in “Journal of cosmetic dermatology”

Coconut oil makes hair stronger and more flexible than mineral oil.

research The Study of Development of Permanent Wave for Additives of Collagen

2 citations , September 2010 in “Journal of the Korea Academia-Industrial cooperation Society”

Using 2% collagen in perms reduces hair damage while keeping curls.

research Effect of Fastness, Hair Coating and Hair Protection by Dyeing of Orange Henna

September 2011 in “Daehan miyong hakoeji”

Henna orange powder, especially with alkali, protects and colors hair better than oxidizing colorants.

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community Considering giving a laser comb a shot. Here’s a summary of my research on the subject.

10 upvotes 9 years ago

Considering adding Low Level Laser Therapy (LLLT) to a hair loss prevention regimen; discussing the effectiveness of LLLT, and evaluating double-blind random-controlled trials that have been conducted on laser combs.

community Can hard water affect your scalp/hair?

in Chat 15 upvotes 4 years ago

Hard water may contribute to an itchy, dry scalp and hair issues, but it doesn't affect genetic hair loss. Some users suggest using distilled water or a water softener to alleviate symptoms.

community LLLT seems like it's at least a solid maintenance tool. Can also provide ok regrowth in AA and MPB. - Pubmed

16 upvotes 8 years ago

Low-Level Laser Therapy (LLLT) is seen as a safe and effective method for maintaining hair and promoting regrowth in androgenetic alopecia (AGA) and male pattern baldness (MPB), with devices like the HairMax LaserComb® and iRestore helmet being popular. Some users and professionals are skeptical about its long-term effectiveness and cost.

community 0.5mg Dutasteride promotes more “regrowth” than 5mg oral Minoxidil

in Research/Science 117 upvotes 2 years ago

Dutasteride promotes more hair regrowth than Minoxidil. Users discuss combining treatments for better results and share personal experiences with side effects.

community Why I really believe the tension theory is the cause of MPB

in Research/Science 70 upvotes 4 years ago

The conversation discusses the tension theory as a cause of male pattern baldness (MPB), suggesting that scalp tension and reduced subcutaneous fat layer contribute to hair loss. Treatments mentioned include Minoxidil, finasteride, microneedling, scalp massages, and Botox.