Adverse Effects of Hair Care Products Among Users

July 2015

Dominique Tennstedt, Anne Herman, Jean‐Marie Lachapelle

TLDR Hair care products can cause skin irritation and allergies.

The document discussed the adverse effects of hair care products used by professionals, which included irritant dermatitis and allergic contact eczema affecting various areas such as the scalp, neck, forehead, and cheeks. Key allergens identified were paraphenylenediamine (PPD) in hair dyes, glycerol monothioglycolate (GMTG) in acid perms, and ammonium persulfate in bleaching agents, which could cause contact urticaria. Other allergens mentioned included cocamidopropyl betaine in surfactants, preservatives, fragrances, and minoxidil.

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community Massive Shedding and Itchy Scalp (Fin 1mg 4x/week, Dut 0.5mg 3x/week, Minoxidil 1ml 2x/day)—Seeking Advice

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in Treatment 59 upvotes 2 months ago

Switching from liquid to foam Minoxidil to avoid scalp irritation, with a method to melt the foam for easier application. Users discuss alternatives and personal experiences with Minoxidil, including issues with propylene glycol and different application methods.

community I tried salt water to stop the DHT itch

in Treatment 60 upvotes 2 years ago

Treating the itch associated with male pattern baldness, which is believed to be caused by DHT. Potential treatments discussed include salt water, finasteride, ketoconazole, and RU58841.

community How I paused my hair loss by curing seborrheic dermatitis

in Treatment 108 upvotes 1 year ago

User Wonderful_Tonight910 suffered from hair loss and seborrheic dermatitis for years. After using irritant-free shampoo, their scalp improved, hair loss stopped, and new hair growth appeared.

community Those that apply minoxidil twice a day

in Chat 70 upvotes 2 weeks ago

Minoxidil is typically applied once daily, with some users opting for foam to minimize irritation. Users often combine it with finasteride or use oral minoxidil for improved results, while managing scalp irritation with ketoconazole or salicylic acid shampoos.

community I am a dermatologist with a clinical interest in alopecia. AMA

in Will treatment work for me? 2 years ago

In this conversation, 4990 discussed various treatments for hair loss, including oral minoxidil, PRP, transplan, Jak inhibitors, Dutasteride, Finasteride, Olumiant, Ketoconazole, RU58841, microneedling, baricitinib, and CCCA. They recommended scalp biopsies in unclear cases of DUPA, twice weekly to twice daily shampooing for topical minoxidil users, and two sessions spaced one month apart with follow up at month three to determine the effectiveness of PRP treatment.