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Glossary Skin Tests

procedures to diagnose allergies or skin conditions

Skin tests, also known as dermatological tests, are procedures used to diagnose allergies, infections, or other skin conditions. Common types include patch tests, which involve applying allergens to the skin to check for reactions, and prick tests, where small amounts of allergens are introduced into the skin using a needle. These tests help identify specific triggers for allergic reactions or other dermatological issues.

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Research

5 / 1000+ results

research Modulating testosterone pathway: a new strategy to tackle male skin aging?

6 citations , September 2012 in “Clinical Interventions in Aging”

This study found that honokiol inhibits enzymes related to testosterone degradation in vitro, suggesting its potential as a lead compound for developing antiaging bioactive ingredients for men.

research Innovations in skin microphysiological systems for nonclinical testing and FDA modernization

January 2026 in “Microsystems & Nanoengineering”

This review discusses advancements in skin microphysiological systems, such as 3D bioprinting, skin organoids, and skin-on-a-chip, and their effectiveness in emulating human skin functions for research and preclinical applications, highlighting the potential for replacing animal testing with these innovative technologies.

research The impact of sheep testis extract on hair follicle growth and skin healing of Wistar rats

1 citations , June 2016 in “Yāftah/hā-yi nuvīn dar ̒ulūm-i zīstī”

This study found that sheep testis extract significantly improved wound healing and hair follicle growth in rats, suggesting it may be a promising candidate for clinical wound healing research.

research Systemic testosterone induces structural, immunological, and sex steroid receptor changes in human XX skin

June 2026 in “Scientific Reports”

This study found that systemic testosterone exposure in transgender individuals with XX genotype alters skin biology, increasing androgen and estrogen receptor-positive cells, collagen density, and fibronectin expression while reducing immune cells, which could affect surgical outcomes by promoting a male skin phenotype.

research Is the metabolism of testosterone to 5α-dihydrotestosterone required for androgen action in the skin?

14 citations , November 1982 in “British Journal of Dermatology”

This article discusses whether testosterone's metabolism to 5α-dihydrotestosterone is necessary for androgenic effects in the skin but reports no new experimental results.

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Community Join

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community What is the actual cause for oily skin/acne after starting finasteride?

in Finasteride/Dutasteride 6 upvotes 1 year ago

Finasteride can cause oily skin and acne due to increased testosterone or sensitivity of androgen receptors. Some users find dutasteride results in less oily skin compared to finasteride.

community Very high testosterone and estradiol on finasterid 1 mg. Am I cooked?

3 upvotes 9 months ago

A 29-year-old male on 1 mg Finasteride for 3 months has experienced a significant increase in testosterone and estradiol levels, with no major side effects except slightly oilier skin and increased emotional sensitivity. The user is concerned about these hormonal changes and seeks advice, as their general practitioner is not knowledgeable about the issue.

community How long does it to start recovering from hair loss / thinning / super brittle after starting taking huge amounts of iron supplements?

in Transgender 1 upvotes 11 months ago

Iron supplements can help improve hair thinning and brittle skin, but recovery time varies based on individual factors like ferritin levels and absorption rates. Regular blood tests are recommended to monitor ferritin and iron levels.

community Has anyone tried tretinoin with seb derm and had any flare-ups as a result?

4 upvotes 7 months ago

Tretinoin can irritate seborrheic dermatitis, but using it with a moisturizer on calm skin may help. Parallel Health's skin microbiome testing and phage therapy are suggested for persistent issues.

community 8 Year's Of Oral Min, Dutasteride and Propecia With 2500 FUT HT

in Progress Pictures 93 upvotes 1 year ago

A user shared their 8-year journey with hair loss treatments, including oral minoxidil, dutasteride, Propecia, and a 2500 FUT hair transplant, leading to significant hair regrowth and a healthy lifestyle. They experienced some side effects like oily skin and a higher-pitched voice but maintained high testosterone levels and a strong libido.

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Learn

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learn Scalp Micropigmentation

Are the pigments used in scalp micropigmentation safe? Providers describe SMP pigments as safe, medical-grade and made for the scalp, but those are supplier and clinic descriptions rather than regulatory approvals: no colour additive is approved for injection into the skin, and allergic reactions to tattoo pigment are documented.
Is scalp micropigmentation suitable for people with sensitive skin? Providers say scalp micropigmentation suits most skin types and describe patch tests, hypoallergenic pigments and a skin consultation for sensitive skin. These are provider claims rather than independent safety evidence, and pigment reactions remain a risk.

learn Microneedling

technique to create small wounds in skin to activate collagen production and hair growth

learn GHK-Cu

What is GHK-Cu and why is it said to be a "miracle" for hair? GHK-Cu is a copper peptide studied mainly for wound healing and skin repair; for hair loss the evidence stops at cell-culture and animal work, and no published human trial has tested it for androgenetic alopecia.

learn Hydrocortisone

Can hydrocortisone be used together with other treatments like minoxidil or steroid injections? Clinicians do use a mild steroid cream to settle the scalp irritation minoxidil can cause, but no verified trial tests hydrocortisone added to minoxidil or to corticosteroid injections, and prolonged scalp use risks skin thinning — combining it is a decision to take with a prescriber.
Is hydrocortisone effective for stopping inflammation that blocks hair growth? Sources describe hydrocortisone as a short-course treatment for scalp inflammation such as seborrhoeic dermatitis or eczema, and no verified trial tests it as a hair-regrowth treatment; the corticosteroids used for alopecia areata are the potent prescription ones, and prolonged use of any topical steroid on the scalp risks skin thinning.

learn Cyproterone

a synthetic anti-androgen and weak progestogen that inhibits DHT binding to androgen receptor

learn Azelaic Acid

acid used for antimicrobial, anti-inflammatory and anti-androgenic properties

learn Vitamin D

vitamin you should probably be taking for general health might also help your hair a little

learn Castor oil

a traditional, natural remedy touted for promoting scalp health and hair growth

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Clinics

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Experts

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35
SMP Specialist
Noelle Skin
Nice, France

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Noelle Skin