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Whole hair strands can reliably measure gamma ray exposure using ESR techniques, but samples should be analyzed quickly or stored in liquid nitrogen.

Hair cortisol levels can effectively indicate long-term hormone activity.

Researchers developed a quick and reliable method to test for betamethasone dipropionate and calcipotriol in ointments and drugs.

Collecting hair from all scalp sections works as well as the standard method for cortisol analysis.

Hair cortisol may help identify adrenal insufficiency in sickle cell disease patients.

Endoscopic imaging can improve tracking of stem cells in the body.

Human dermal fibroblasts and hair papilla cells help outer root sheath cells grow and develop properly.

Removing β-catenin in certain stem cells causes hair whitening and pigmentation issues.

Mutants of CYP154C2 enzyme significantly improved steroid conversion efficiency.

Researchers found key regions in the mouse hairless gene that control its activity in skin and brain cells, affecting hair follicle function.

Caffeine penetrates human skin in lab tests similarly to real-life conditions, but actual skin use is still essential for accurate results.

Type II porcine hair keratin supports cell growth but hinders cell differentiation.

Using 5-butylpicolinate esters improves the sensitivity and reliability of detecting testosterone and dihydrotestosterone in saliva.

Confocal Laser Scanning Microscopy is effective for tracking compounds in the skin.

Lactate production is important for activating hair growth stem cells.

B6.Cg-Tyr c−2J Hr hr /J mice have a stronger delayed sunburn reaction and are good for UV research.

hHbl gene is active in hair shaft cells and some pilomatricomas.

Researchers developed a method to identify and measure different animal hair fibers in textiles, successfully distinguishing materials like cashmere from cheaper fibers.

Human hair keratins can be turned into useful 3D biomedical scaffolds through a freeze-thaw process.

CD200 is not a reliable marker for identifying stem cells in all skin types.

Testosterone increases 3α-androstanediol levels, which can be blocked by finasteride.

Older age increases positive hair alcohol test results, and chest hair is a good alternative for testing; season affects results, with higher levels in winter.

Human hair matrix cells and dermal papilla fibroblasts can form early hair follicle structures but don't produce hair shafts yet.

A new method accurately detects illegal JAK inhibitors in hair loss cosmetics.

Trichoscan® is best for measuring hair growth, RCM for analyzing hair follicles, and OCT is useful for both.

Hair follicle testing is more reliable and effective for drug screening than urinalysis.

The herbal extract SHJ promotes hair growth and increases melanin production.

New imaging technologies help us see how stem cells work in living animals.

HEM-13HDC, a mix of 8 herbal extracts, helps hair grow and affects hair growth at a molecular level.