Age-Dependent Measurements of Amino Acids in Human Hairs: A Longitudinal Study

A 25-year-old male experienced significant hair thinning and shedding, but a dermatologist ruled out androgenetic alopecia and recommended Propacil serum and a supplement with biotin, niacin, amino acids, and minerals. Despite using these treatments for a month without improvement, the user is advised by others to seek a second opinion and consider potential nutritional deficiencies or other health issues.

A 23-year-old shares their hair and eyebrow regrowth journey, attributing success to a routine involving Minoxidil, Dutasteride, vitamins, biotin, and fish oil, alongside improved lifestyle habits. They report no side effects from Dutasteride and minor itchiness from Minoxidil, noting significant improvements in appearance and satisfaction with the results.

A 24-year-old woman with AGA and TE since age 14 is questioning if her hair is regrowing or breaking. She has been using minoxidil consistently since September 2025, along with caffeine and ketoconazole shampoos, rosemary oil, and saw palmetto, and has improved her overall hair care routine.

OP shared a 7-year hair density progress update using Minoxidil, Finasteride, and dermarolling. Creatine use was discussed, with mixed opinions on its impact on hair loss.

A 16-year-old experiencing hair thinning noticed a shift from shedding long hairs to shorter hairs, while using Vitamin D, biotin supplements, ketoconazole shampoo, and improving diet. They are questioning if the short hairs indicate regrowth or androgenetic alopecia (AGA).

A 23-year-old user shares their hair regrowth journey, questioning if genetics or other factors are at play. They use Rogaine, finasteride, vitamin B12, biotin, Thera M Plus, and derma stamping, and seek advice on their regimen and hair growth patterns.