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GlossaryParaphenylenediamine

chemical in hair dyes that can cause allergic reactions

Paraphenylenediamine (PPD) is a chemical commonly used in hair dyes to achieve long-lasting color. It is known for its ability to penetrate the hair shaft and provide a natural-looking color, but it can also cause allergic reactions in some individuals, leading to skin irritation or more severe responses.

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research Severe Hair Loss of the Scalp Due to a Hair Dye Containing Para-Phenylenediamine

20 citations, June 2011 in “ISRN Dermatology (Print)”

A woman lost most of her hair due to an allergic reaction to a hair dye ingredient.

research Chemical Leukoderma from Hair Dye Containing Para-Phenylenediamine

9 citations, July 2012 in “Dermatitis”

Hair dye with para-phenylenediamine can cause skin depigmentation.

research Implication of MicroRNA Regulation in Para-Phenylenediamine-Induced Cell Death and Senescence in Normal Human Hair Dermal Papilla Cells

8 citations, March 2015 in “Molecular Medicine Reports”

Hair dye ingredient PPD causes cell death and aging in human hair cells by altering microRNA levels.

research 55 Cases of Allergic Reactions to Hair Dye: A Descriptive, Consumer Complaint-Based Study

98 citations, November 2002 in “Contact Dermatitis”

Many people had severe allergic reactions to a common hair dye ingredient, causing them to seek medical care and miss work.

research Hair Cosmetics

43 citations, January 2013 in “Indian Journal of Dermatology, Venereology and Leprology”

The article concludes that advancements in hair cosmetics require dermatologists to stay informed about products and their potential risks, including allergies and higher risks for hairdressers.

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community Revalid hair complex against hair thinning?

in Product 3 upvotes 5 months ago

A 17-year-old with thinning hair is considering using Revalid, a supplement with ingredients like biotin and zinc, based on parental recommendations. Another user suggests that supplements could help since the hair thinning doesn't seem to be androgenic alopecia.

community does lowering your prolactin levels regrow hair?

in Research/Science 9 upvotes 2 years ago

The potential of lowering prolactin levels to regrow hair, with a reference to Bayer's drug HMI 115 which has been indicated as having this effect. Treatments mentioned include Minoxidil and Finasteride, as well as RU58841.

community DHT LEVEL IS 700pg/ml AFTER 8 MONTHS OF DUTASTERIDE

in Finasteride/Dutasteride 22 upvotes 4 months ago

The user had high DHT levels after 8 months on dutasteride, questioning the drug's authenticity. They got dutasteride from a legitimate source and will update on progress.

community 4 years on fin and totally stopped hair loss

in Progress Pictures 92 upvotes 5 months ago

A user stopped hair loss after taking finasteride daily for four years, with minimal regrowth and no side effects. They believe stress initially caused their hair loss.

community bro where tf is GT20029, Q1 2024 is over already

in Research/Science 43 upvotes 10 months ago

The conversation discusses the delay in the release of GT20029 for hair loss treatment and skepticism about its effectiveness. Participants mention other treatments like verteporfin and advancements in transplant procedures as more realistic options.

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