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research [Contribution to hair medulla study (author's transl)].

4 citations , January 1981 in “PubMed”

This study found that medullary cell content in mammal hair evolves from an amorphous form to a biphasic phase, with human and anthropoid hair containing both macrofibrils and microfibrils.

research Two Hypomorphic Alleles of Mouse Ass1 as a New Animal Model of Citrullinemia Type I and Other Hyperammonemic Syndromes

35 citations , August 2010 in “The American journal of pathology”

This study reports that hypomorphic alleles of the Ass1 gene in mice resemble human CTLN1, providing a potential model for preclinical studies and indicating that standard treatments for CTLN1 can rescue phenotypes.

research Citrulline-containing basal cell carcinomas. Differentiation toward hair structures with induction of dermal hair papillae

21 citations , September 1968 in “Cancer”

This study identified that keratotic basal cell carcinomas with citrulline-positive keratin and hair papilla-like structures are highly differentiated, which helps distinguish them from squamous carcinomas.

research Unravelling the threads of central centrifugal cicatricial alopecia

March 2026 in “Journal of Investigative Dermatology”

Genetic factors, especially PADI3 gene variants, contribute to CCCA in women of African descent.

research A Mixture of Tocopherol Acetate and L-Menthol Synergistically Promotes Hair Growth in C57BL/6 Mice

7 citations , December 2020 in “Pharmaceutics”

In this study, a mixture of tocopherol acetate, L-menthol, and stevioside was more effective in promoting hair growth in mice compared to tocopherol acetate or L-menthol alone.

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community Finasteride Doubled my Total & Free Test but also my Estradiol - 8 months in

in Chat 32 upvotes 2 months ago

A 22-year-old male experienced increased testosterone and estradiol levels after 8 months on finasteride, leading to softer erections and reduced arousal. Suggestions included reducing finasteride dosage, using supplements like L-arginine, L-citrulline, zinc, and possibly tadalafil to improve symptoms.

community To people who have tried lowering / suppressing Fin sides with supplements

2 upvotes 2 years ago

A user seeks advice on supplements to counteract libido and erection issues while taking Finasteride. Suggested supplements include Zinc, Maca, L-Arginine, L-Citrulline, Ginseng, Ginkgo, Ashwagandha, and Boron.

community Is Cialis the best option for when you have ED on DHT blockers?

in Chat 61 upvotes 2 months ago

The conversation discusses using finasteride for hair loss and its side effect of erectile dysfunction (ED), with some users suggesting reducing the dose to 0.5mg to minimize side effects. Cialis is recommended for managing ED, and other suggestions include monitoring hormone levels and considering supplements like DIM or L-Citrulline.

community 26m 6 months oral fin/min tablet results!

65 upvotes 6 months ago

A 26-year-old male experienced hair regrowth and increased density after 6 months using oral finasteride and minoxidil tablets, along with a derma pen, multivitamins, omega-3, creatine, and L-citrulline. He plans to add RU58841 soon and is hopeful for further improvement.

community 1.5 years fin results ( 0.25mg ED)

in Progress Pictures 169 upvotes 2 years ago

A user shared their 1.5-year experience using 0.25mg finasteride daily for hair loss, noting significant hair quality improvements and reduced scalp itch but mild erectile dysfunction. They managed side effects with daily 2.5mg Cialis and 5mg citrulline and plan to continue this routine.

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Learn

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learn L-cysteine

What is L-cysteine, and why is it often included in hair growth supplements? Cysteine is a building block of keratin, the main protein in hair. Whether cysteine supplements help hair in people who eat enough protein is unproven.
Can taking L-cysteine orally really strengthen hair from the inside? No verified study shows that L-cysteine on its own strengthens hair. The one controlled trial found tested a multi-ingredient supplement in women with shedding and did not measure hair strength.
Does L-cysteine work better alone or when combined with other vitamins and minerals? Studies have only tested cysteine inside multi-ingredient supplements, so its effect alone, and whether combinations work better, is unknown.
All 5 questions on L-cysteine →

learn L-methionine

learn L-Lysine

learn L-Proline

learn L'Carnitine

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