July 2022 in “Research Square (Research Square)” Hair analysis can somewhat track past testosterone levels but is influenced by factors like hair washing, growth rate, sex, and hair color.
September 2023 in “Scientific reports” Segmental hair analysis can track testosterone over time but needs adjustments for sex, hair color, and washing frequency.
66 citations
,
February 2006 in “Photochemical & photobiological sciences” We don't fully understand how sunlight damages different types of hair.
23 citations
,
April 1999 in “Dermatologic Clinics” Pulsed-intense light can significantly reduce hair, with effectiveness depending on treatment number and timing, and has mild side effects.
November 2023 in “Cosmetics” Rice derivatives in conditioners protect and improve hair health.