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Glossary Tensile 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 Hair Regrowth and Increased Hair Tensile Strength Using the HairMax LaserComb for Low-Level Laser Therapy

75 citations , August 2003 in “International journal of cosmetic surgery and aesthetic dermatology”

This study found that low level laser therapy with a HairMax LaserComb improved hair counts and tensile strength in patients with androgenetic alopecia, particularly in males and vertex areas.

research Effects of Hair Follicle Stem Cells on Partial-Thickness Burn Wound Healing and Tensile Strength

38 citations , December 2019 in “Iranian Biomedical Journal”

This study found that hair follicle stem cells could enhance burn wound healing and improve tissue tensile strength in rats.

research Effect of oil application, age, diet, and pigmentation on the tensile strength and breaking point of hair

6 citations , January 2016 in “International journal of trichology”

In this study, children's hair showed statistically higher elasticity than elderly hair, but no significant differences were observed in tensile strength between dietary or oil application groups, or between pigmented and nonpigmented hair.

research A method to measure oil penetration into hair and correlation to tensile strength

1 citations , July 2022 in “International journal of trichology”

This study found that Type 3 hair oil penetrated the hair shaft more effectively than coconut oil, resulting in greater increases in hair thickness and tensile strength.

research Evaluation method of the degree of hair damage. (I). Measurement of tensile strength of human hair by "the multi-point tension test method".

1 citations , January 1987 in “Journal of Society of Cosmetic Chemists of Japan”

This study used a multi-point tension test method to evaluate hair damage over time and found it useful for assessing the effects of cosmetics and metal content on hair strength.

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community Can hard water affect your scalp/hair?

14 upvotes 5 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

17 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.

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