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Childhood sexual trauma, especially between ages 5-7, is linked to lower cortisol levels in adult hair, suggesting long-term stress response changes.

Hair analysis is better than urine and blood for detecting past drug use.

Both a lock of hair and a single hair strand can show chronic drug use, but at least six single hairs are needed for accurate results.

Muskox hair growth rates vary widely, so a single growth rate can't be used for all populations.

Clippers are the best tool for collecting dog hair for chemical tests, being fast and stress-free for the dog.

The wolves suspected of man-eating in the 1880s likely ate very little human flesh and mostly consumed a diet similar to herbivores and omnivores.

The RapidHIT ID system can effectively get DNA profiles from hair roots with enough cells.

Zolpidem shows up in hair from the top back of the head after one dose and fades over time, suggesting it gets into hair through blood and sweat.

New methods to classify curly hair types were developed based on shape and strength.

Hair analysis can somewhat track past testosterone levels but is influenced by factors like hair washing, growth rate, sex, and hair color.

Hair properties change under electromagnetic fields and are influenced by individual characteristics and the environment.

Two mouse mutants have defective hair cuticle cross-linking.

Higher cortisol levels are linked to poor coping, while higher DHEA levels are linked to job confidence.

The COVID-19 pandemic did not significantly change stress levels in preschoolers, but higher-income families' children showed higher stress.

Pig hair cortisol levels are inheritable and linked to stress responses, which could help select for more resilient pigs.

Coconut oil helps protect and improve damaged hair.

High temperatures, acidic conditions, and too much coconut oil damage hair, while a pH of 5 to 7 keeps it healthy.

Prussian Blue causes hair cuticles to detach, weakening the hair.

The research improved understanding of hair and skin properties across different ethnicities and conditions.

Ozone reacts more with unwashed hair, producing compounds due to scalp oils, which could lower ozone exposure but increase exposure to reaction products.

The EDAR gene greatly affects hair thickness in Asian populations.

Minoxidil promotes hair growth in women with early-stage alopecia.

AFM helped show how hair changes under tension and the effects of damage and conditioner.

The conclusion is that recognizing hair growth cycles can improve the precision of dietary and health assessments from hair analysis.

Wait 4-5 weeks after drug use before hair testing and cut hair into three segments to confirm single drug exposure.

Dye enters hair at the edges of cuticle cells and penetrates more from water than alcohol-based solutions.

Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.

Melatonin implants and long daylight hours alter the timing of hormone release and hair growth in mouflon sheep.

Red Ginseng Extract may help human hair grow by activating growth pathways and blocking negative effects of certain hormones.

White hair grows thicker and faster than black hair due to higher activity of growth-related genes and proteins.