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Different women's hair and skin glands respond to hormones in varied ways, which can cause unwanted hair growth even with normal hormone levels, and more research is needed to treat this effectively.

Microfluorometry effectively measures how much polymer coats and penetrates hair, useful for evaluating hair products.

Skin cells produce and activate vitamin D, which regulates skin functions and supports hair growth.

Vitamin D and its receptor regulate skin functions like cell growth, immunity, hair cycle, and tumor prevention.

Growing hair follicles have high mitochondrial activity and ROS in specific regions, aiding hair formation.

Hair lipids do not protect against humidity.

PAI-2 helps in the maturation and protection of hair and nail cells.

Nutrients like vitamins, copper, zinc, and amino acids are crucial for healthy hair and wool growth.

Androgens can both increase body hair and cause scalp hair loss.

Certain micronutrients may improve hair and nail health, but more research is needed to confirm their benefits.

Some chemicals and drugs can cause hair loss, which usually grows back after stopping the treatment.

Sex hormones affect reproduction, sexual development, and oral health, and it's important for dental practitioners to understand their effects and interactions.

Tight junctions are key for skin protection and controlling what gets absorbed or passes through the skin.

Modern lifestyles, including poor diet, stress, and long-term use of certain medications, hinder the body's ability to heal from inflammation, leading to chronic diseases.

Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.

Merkel cells may have roles in sensing magnetic fields, creating fingerprints, Reiki energy healing, passing on environmental information to offspring, and influencing hair shape.

Different tests are used to see how hair care products affect hair, and choosing the right test is important for accurate results.

Understanding hair biology is key to developing better treatments for hair and scalp issues.

Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.

The herbal hair dye is a safe and eco-friendly alternative to conventional dyes.

The document concludes that hair loss is influenced by genetics and other factors, and while treatments like finasteride can help, they have limitations and side effects.

Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.

Understanding gene expression in hair follicles can reveal insights into hair growth and disorders.

The conclusion is that certain cell interactions and signals are crucial for hair growth and regeneration.

The hedgehog signaling pathway is crucial for hair growth but not for the initial creation of hair follicles.

Researchers created human hair follicles using a new method that could help treat hair loss.

Hair follicle stem cells are key for hair and skin regeneration, can be reprogrammed, and have potential therapeutic uses, but also carry a risk of cancer.

Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.

The TGM3 gene's promoter region is key for skin and hair cell function and may aid gene therapy.

The document concludes that understanding the genes and pathways involved in hair growth is crucial for developing treatments for hair diseases.