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GlossaryAlexandrite Laser

laser emitting 755 nm light, used for hair removal

An Alexandrite Laser is a type of laser that emits light at a wavelength of 755 nanometers, which is in the red and near-infrared spectrum. It is commonly used for hair removal, as well as for treating pigmented lesions and vascular lesions. The laser works by targeting the melanin in hair follicles, making it particularly effective for individuals with light to olive skin tones and dark hair.

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research Hair Removal by Lasers

2 citations , January 2000

Lasers are effective for hair removal, especially for conditions like excessive hair growth.

research Advances in Laser Therapy for Hidradenitis Suppurativa: A Systematic Assessment of Current Evidence

1 citations , October 2025 in “Journal of Clinical Medicine”

Laser therapy effectively treats all stages of hidradenitis suppurativa, offering a reliable alternative to medication.

research A Clinical Overview of Hair Removal Using Lasers and Light Sources

73 citations , April 1999 in “Dermatologic Clinics”

Lasers and light sources can effectively remove hair, work best on fair skin with dark hair, and usually need multiple treatments.

research Laser for Hair Removal: A Review of Technologies and Efficacy

January 2018 in “Springer eBooks”

Lasers are FDA-approved for permanent hair reduction, not removal, and more research is needed to improve treatments.

research New Dimensions in Hirsutism

19 citations , July 2006 in “Lasers in medical science”

Laser hair removal is safe and effective for fair-skinned people with dark hair, and using eflornithine with laser treatments can improve results.

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community Justin Trudeau really is one lucky guy

in Satire 233 upvotes 5 months ago

Justin Trudeau's full head of hair at 53 is humorously attributed to unpredictable genetics and possible use of finasteride. The conversation jokes about a resemblance to Fidel Castro, suggesting genetic luck or treatment use.