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GlossaryInstrumental Variable Analysis

statistical method to estimate causal effects using external variables

Instrumental Variable Analysis (IV Analysis) is a statistical method used to estimate causal relationships when controlled experiments are not feasible. It involves using an "instrumental variable" that is correlated with the independent variable but not with the error terms in the model, helping to address issues of endogeneity and confounding variables. This technique is particularly useful in fields like economics and epidemiology, where randomized controlled trials are often impractical.

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Exploring the Causal Relationship and Molecular Mechanisms Between Fasting Insulin and Androgenetic Alopecia: A Mendelian Randomization Study with Bioinformatics Analysis

research Exploring the Causal Relationship and Molecular Mechanisms Between Fasting Insulin and Androgenetic Alopecia: A Mendelian Randomization Study with Bioinformatics Analysis

February 2025 in “Clinical Cosmetic and Investigational Dermatology”

Higher fasting insulin levels increase the risk of androgenetic alopecia.

research Roles of Gut Microbiota in Androgenetic Alopecia: Insights from Mendelian Randomization Analysis

April 2024 in “Frontiers in microbiology”

Certain gut bacteria may increase or decrease the risk of male pattern baldness.

research Incidence of Type 2 Diabetes Mellitus in Men Receiving Steroid 5α-Reductase Inhibitors: Population-Based Cohort Study

29 citations, April 2019 in “BMJ. British medical journal”

Men taking dutasteride or finasteride have a slightly higher risk of developing type 2 diabetes.

Association Between Genetically Predicted Leukocyte Telomere Length and Non-Scarring Alopecia: A Two-Sample Mendelian Randomization Study

research Association Between Genetically Predicted Leukocyte Telomere Length and Non-Scarring Alopecia: A Two-Sample Mendelian Randomization Study

4 citations, January 2023 in “Frontiers in Immunology”

Shorter telomeres in white blood cells may increase the risk of a common type of hair loss.

research Causal Relationship Between Gut Microbiota And Androgenic Alopecia: A Mendelian Randomization Analysis

May 2025 in “Annals of surgical case reports & images.”

Certain gut bacteria may protect against hair loss, while others may increase the risk.

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community Is this regrowth? 11 months topical solution (min/fin)

in Is this regrowth? 413 upvotes 1 year ago

The user has been using a topical solution of Minoxidil and Finasteride for hair regrowth for 11 months, applying it three times a week. The responses to the user's question about regrowth are mixed, with some users confirming regrowth and others suggesting it's time to give up.

community I started rapidly diffuse thinning at 22. I'm 42 now and have as much hair as I did at 16. AMA

in Treatment 443 upvotes 5 years ago

Hair loss treatments like finasteride, minoxidil, ketoconazole, PRP, and microneedling helped maintain hair for 20 years. Research and try evidence-based treatments for best results.

community Hair progress from a year ago to today

in Progress Pictures 128 upvotes 1 year ago

A user shared their daily hair loss treatment routine, which includes 1mg of oral finasteride, 1mg of oral minoxidil, 1ml of castor oil, biotin, collagen, multivitamins, zinc, magnesium, liver supplements, RU58841 every night, and ketoconazole shampoo twice a week. They also mentioned a healthy lifestyle and a past unsuccessful hair transplant, but have experienced hair regrowth and thickening since starting their current regimen.

community Should I start fin+min treatment? Norwood 2

in Treatment 2 upvotes 2 years ago

25-year-old male with Norwood 2 hair loss tried PRP injections without success. Dermatologists didn't recommend finasteride or minoxidil, but suggested PRP + Mesotherapy for 50% improvement.

community The first and third are from October 3rd, 2024. 2nd and 4th pics are from today (February 20th 2024) the 5th pic is just a general overall shot of how it looks. (4 month progress)

in Progress Pictures 54 upvotes 5 months ago

The user experienced significant hair regrowth using minoxidil (5% topical) once nightly and finasteride (1mg) daily, despite a poor diet, high stress, and lack of sleep. They plan to start dermastamping and improve their overall health for better results.

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