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Glossary Particulate Matter

mixture of tiny solid particles and liquid droplets in air

Particulate Matter (PM) refers to a mixture of tiny solid particles and liquid droplets found in the air. These particles can include dust, dirt, soot, and smoke, and they vary in size, with PM10 and PM2.5 being common classifications based on their diameter in micrometers. PM2.5, in particular, can penetrate deep into the lungs and even enter the bloodstream, posing significant health risks such as respiratory and cardiovascular issues.

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research Particulate matter 2.5 damages skin cells by inducing oxidative stress, subcellular organelle dysfunction, and apoptosis

215 citations , March 2018 in “Archives of Toxicology”

This study found that PM2.5 exposure induced oxidative stress in human keratinocytes and mouse skin, causing cellular damage, which was mitigated by the antioxidant N-acetyl cysteine.

research Particulate matter exposure induces maternal scalp hair loss after birth in C57/B6 mouse via alteration of inflammatory and apoptotic pathways

May 2026 in “Frontiers in Endocrinology”

In a mouse model, this study found that exposure to PM2.5 leads to significant postpartum hair loss, apparent via morphological changes and elevated markers of inflammation, apoptosis, and fibrosis, potentially exacerbated by changes in hormone receptors and stem cell populations.

research Exploration of Natural Adsorbents for Applications in Pollution-Reducing Cosmetic Formulations

March 2026 in “Gels”

This review found that exposure to pollutants like PM, NOx, and PAHs is linked to various skin and hair disorders, indicating a need for cosmetics with natural adsorbents to reduce pollutant effects, achieving 30-55% removal efficiency.

research Cordyceps militaris Grown on Germinated Rhynchosia nulubilis (GRC) Encapsulated in Chitosan Nanoparticle (GCN) Suppresses Particulate Matter (PM)-Induced Lung Inflammation in Mice

4 citations , October 2024 in “International Journal of Molecular Sciences”

This study found that chitosan nanoparticle-encapsulated Cordyceps militaris significantly reduced inflammation and oxidative stress in particulate matter-exposed mice, suggesting potential use for managing lung inflammation.

research Eupafolin nanoparticles protect HaCaT keratinocytes from particulate matter-induced inflammation and oxidative stress

43 citations , August 2016 in “International Journal of Nanomedicine”

This study found that a eupafolin nanoparticle delivery system improved water solubility and skin penetration, enhancing its antioxidant and anti-inflammatory effects against particulate matter-induced stress in skin cells.

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community 2 months of Oral .5 Fin 2.5 Min - Let me know your thoughts!

in Is this regrowth? 160 upvotes 1 year ago

The user is experiencing positive hair regrowth after two months of using oral finasteride (0.5 mg) and minoxidil (2.5 mg) and is considering a hair transplant. They are seeking advice on surgeons closer to the U.S. and discussing potential side effects and alternative treatments.

community Age 18 vs Age 25, the importance of starting early

886 upvotes 1 year ago

An 18-year-old began using Finasteride and Topical Minoxidil for hair loss, later switching to Oral Minoxidil and Dutasteride by age 25. The conversation emphasizes early treatment, potential side effects, and differing opinions on medication effectiveness.

community 6 years of finasteride 1.25mg daily. No other treatments. No side effects. Glad I started early!

in Progress Pictures 316 upvotes 1 year ago

A user reported positive results using finasteride 1.25mg daily for six years with no side effects, highlighting early treatment benefits. Others discussed experiences with finasteride, minoxidil, and dutasteride, mentioning different side effects and effectiveness.

community Why don't we all just take 2.5mg dutasteride?

in Finasteride/Dutasteride 45 upvotes 11 months ago

Switching from finasteride and minoxidil to a higher dose of dutasteride for hair loss is debated due to potential side effects. Many suggest starting with lower doses or sticking to finasteride if effective.

community Hair regrowth without drugs (99% natural) 25M

528 upvotes 4 months ago

A user shared their experience with hair regrowth using supplements like NAC and DIM, and briefly using minoxidil with microneedling. They reported some improvement in hair density, but the community questioned the effectiveness compared to traditional treatments like finasteride.

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