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Accurate quantitative bioanalysis using LC-MS/MS is challenging due to matrix effects, but using internal standards and new methods like in-sample calibration could improve results.

The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.

Method detects finasteride in plasma at very low concentrations.

A new, quick method was developed to analyze skin lipids, discovering a new ceramide subclass.

Hair testing can detect a single GHB exposure, useful for documenting sexual assault.

Cortisone in hair is a more reliable indicator of stress hormone exposure than cortisol.

Researchers developed a method to measure plant compounds in rat blood and found they are quickly absorbed and eliminated within 36 hours.

Researchers developed a new method to find substances in herbs that can block a specific enzyme linked to hair loss.

A new method was created to measure metformin in hair, showing potential for monitoring treatment and medical investigations.

The new LC-MS/MS method is more accurate and reliable than traditional immunoassays for measuring steroids in serum.

Method measures latanoprost and minoxidil in skin accurately and precisely.

A higher testosterone to dihydrotestosterone ratio may indicate worse metabolic health in women.

The method can measure vitamin B3 levels in human hair accurately.

LC-MS/MS is more reliable than immunoassays for diagnosing 21-hydroxylase deficiency.

New method effectively detects illegal hormones in anti-aging foods.

The new method can measure sleep-related hormones in hair effectively and could help track long-term sleep patterns.

The method accurately measures sex hormones in human plasma but can have small errors.

The conclusion is that a new method can measure caffeine and drugs in hair, finding caffeine abusers have 70 times more caffeine than normal, with a proposed cut-off value for abuse.

Researchers created a reliable method to detect hair-growth substances in products.

Diet and sunlight are important for maintaining good vitamin D levels.

A reliable method was developed to detect hair growth compounds in products, ensuring safety and compliance.

Chronic stress increased after lockdown, especially in young adults and females.

A reliable method was developed to measure Finasteride and Tadalafil in rat blood.

A new method accurately measures three compounds in rat plasma from pine needle extracts, aiding future research on its use for hair loss.

Hair cortisol levels change with age, starting high at birth, decreasing until age 6, then rising to adult levels by age 18.

Using LC-MS/MS for hormone measurement can prevent false high testosterone results and avoid unnecessary tests.

A new method accurately measures long-term hormone levels in hair.

The two finasteride tablets are bioequivalent.

A reliable method was developed to measure candesartan in human plasma.