Search

for
Search:

Research

5 / 1000+ results

research Clippers are superior to scissors in the collection of hair for chemical analysis in companion dogs: a Dog Aging Project preliminary study

March 2024 in “American journal of veterinary research”

This study found that clippers are the safest and most efficient tool for collecting hair samples from companion dogs, with no impact on cortisol concentration compared to scissors.

research Bias in Hair Cortisol Measures for Psychological Stress: Self vs. Professional Collection

January 2026 in “Psychoneuroendocrinology”

Self-collected hair samples can measure stress but may need adjustments for accuracy.

Sample Collecting Methods for Bacterial Community Structure Analysis of Scalp Hair: Non-Invasive Swabbing Versus Intrusive Hair Shaft Cutting

research Sample collecting methods for bacterial community structure analysis of scalp hair: non-invasive swabbing versus intrusive hair shaft cutting

1 citations , September 2024 in “Scientific Reports”

This study observed that bacterial communities on scalp hair collected through non-invasive swabbing showed similar diversity and composition to those obtained by cutting or removing hair, suggesting that swabbing is an effective method for microbiome analysis on hair.

research Collecting Hair Samples for Hair Cortisol Analysis in African Americans

44 citations , June 2018 in “Journal of Visualized Experiments”

This paper presents a culturally informed protocol designed to improve the collection of hair samples from African Americans for cortisol measurement, illustrating its application with community-based study data.

research Development and validation of hair specimen collection methods among extremely short‐length Afro‐textured hair

4 citations , February 2019 in “American Journal of Human Biology”

This study suggests that collecting hair samples from all scalp regions may be a viable alternative for measuring cortisol in individuals with Afro-textured or extremely short hair, aligning results with traditional methods.

View more "hair collection" in research →

Community Join

5 / 1000+ results

community Connection between caffeine and hair loss?

in Product 2 years ago

Caffeine might raise stress hormones, potentially worsening hair loss. Telogen effluvium is often misattributed to minor stressors rather than significant life events.

community Connection between heat (dry/flaky scalp) and hair loss?

5 upvotes 10 years ago

The user experienced hair loss and used minoxidil, biotin shampoo, and supplements like biotin, zinc, fish oil, saw palmetto, and B vitamins, which initially stopped hair loss but did not promote regrowth. They suspect heat causes a dry, flaky scalp leading to hair loss and are considering using a supplementary shampoo and possibly finasteride.

community Sugar and Hair loss connections

in Research/Science 41 upvotes 1 year ago

High sugar diets may worsen hair loss by increasing 5α-reductase activity and androgen levels, especially in women with PCOS. A low sugar diet might reduce scalp DHT levels, similar to finasteride, but genetics also significantly influence hair loss.

community Low iron and hair loss connection

17 upvotes 2 years ago

A 39-year-old woman noticed hair thinning and found she has an iron deficiency, which may be linked to hair loss. Suggestions included seeing a dermatologist, using spironolactone, and minoxidil.

community What’s the connection between folliculitis and hair loss?

in Research/Science 16 upvotes 1 year ago

Folliculitis may be linked to hair loss, with treatments including antibiotics, minoxidil, finasteride, and dietary changes. Users suggest seeing a dermatologist for proper diagnosis and treatment.

View more "hair collection" in community →

Learn

10 / 801 results

learn Vitamin D

What is the connection between Vitamin D and hair loss? Vitamin D deficiency may contribute to hair loss by disrupting hair follicle regulation.

learn Hair Transplant

Does hair grow back in the donor area after a hair transplant? Hair does not grow back in the donor area after extraction during a hair transplant.

learn Scalp Micropigmentation

How much does scalp micropigmentation cost? Scalp micropigmentation typically costs between $1,000 and $5,000 depending on individual needs.

learn tamsulosin

What is tamsulosin and how is it used in treatments related to hair loss? Tamsulosin is a prescription alpha-1 blocker approved for benign prostatic hyperplasia; no human trial has tested it for hair loss, and there are no dosing protocols or safety data for that use. Its connection to hair is a receptor-biology hypothesis, not a treatment.