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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.

Hair area varies with age and sex, but hair index and medullary index do not.

The research found that postmortem root bands in hair are likely caused by the breakdown of a specific part of the hair's inner structure after death.

The hair of two ancient Chilean mummies is well-preserved and contains high levels of heavy metals.

The study could not confirm if Victor Vinnetou was Mbuyisa Makhubu and suggested more evidence, like DNA tests, is needed.

Shrunken heads retain some facial features and hair characteristics, allowing for limited individual identification.

The model accurately predicts age from saliva and buccal cells for forensic use.

DNA phenotyping helps predict physical traits from DNA with varying accuracy and requires careful ethical and legal handling.

Darker hair in guinea pigs holds more codeine than lighter hair.

Hair color is important in many fields and is measured for various purposes.

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

Darker skin in 10-year-old girls may be an early sign of puberty.

Bioassays help find useful compounds in nature for making medicines, supplements, and cosmetics.

Permanent hair dyes use chemicals that react with hydrogen peroxide to create color.

The review explains how hair products work and the science of different hair types to help improve hair care research.

George Ernest Rogers was a notable scientist who made important discoveries about hair and wool proteins.

Human hair varies widely and should be classified by curl type rather than race.

Dermatologists play a key role in identifying and documenting signs of abuse and injury for forensic investigations.

DNA profiling in forensics has improved, but predicting physical traits and ancestry from DNA has limitations and requires ethical consideration.

Tandem repeats significantly influence hair color, especially darker shades, across different ancestries.

Long-term use of finasteride in women can cause hormonal changes, DNA damage, and menstrual issues.

The modified staining method can determine the ABO blood group of hair samples accurately.

Keratin proteins are consistent across different hair types from the same person.

Human hair protein modifications could potentially indicate heart disease risk.

Chemical hair straightening significantly reduces detectable drug levels in hair.

Genetic data can predict male-pattern baldness with moderate accuracy, especially for early-onset cases in some European men.

Licorice has many traditional health benefits, but more research is needed to fully support these claims.

Hair analysis can help identify specific minerals and amino acids linked to various diseases.

Quantifying hair shape is better than using racial categories for understanding hair characteristics.

Grape seed oil improved hair quality the most, followed by rosehip and safflower seed oils, and reduced damage from shampoo.