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Certain skin drugs and topical agents, including some natural extracts and fragrances, can cause allergic reactions. Some hair dyes and extensions, as well as minoxidil, a hair growth treatment, can also cause allergies. Botulinum toxin A can effectively reduce sweat but may have temporary side effects.

Hair follicle development is controlled by interactions between skin tissues and specific molecular signals.

Rosacea is a skin condition with unclear causes, classified into four subtypes.

Natural products in cosmetics are beneficial for skin and hair care with low toxicity.

Chemotherapy can cause various skin reactions, with hair loss being the most common, and proper diagnosis and treatment of these reactions are important.

Dermoscopy is a useful tool for identifying features of skin conditions, but more research is needed to define its role in dermatology.

Skin fat cells help with skin balance, hair growth, and healing wounds.

The study identified unique genes in hair follicle cells and their environment, suggesting these genes help organize cells for hair growth.

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.

New research suggests that skin cell renewal may not require a special type of cell previously thought to be essential.

Hyaluronate fragments can help reverse skin thinning by working with the CD44 receptor.

Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.

Surgical face-lifts are more effective, but fractional radiofrequency is a good, less invasive alternative for treating skin laxity.

Postinflammatory hyperpigmentation causes dark skin patches and needs personalized treatment.

Skin-derived precursors in hair follicles come from different origins but function similarly.

Nutraceuticals may improve skin health and protect against aging, but more research is needed on their optimal use and possible health risks.

Melanocytes are crucial for skin pigmentation and can affect conditions like melanoma, vitiligo, and albinism, as well as hair color and hearing.

DGAT1 enzyme is crucial for healthy skin and hair by regulating retinoid levels.

The yeast Pityrosporum ovale can cause skin allergies and infections, and antifungal treatments like ketoconazole are effective against it.

Skin changes can help diagnose and manage endocrine disorders like thyroid problems, diabetes, and adrenal gland conditions.

The TGF-β family helps control how cells change and move, affecting skin, hair, and organ development.

Mutations in Gasdermin A3 cause skin inflammation and hair loss by disrupting mitochondria.

Triparanol therapy can cause hair loss and skin dryness without inflammation or damage to hair follicles or skin structures.

Mushrooms have beneficial properties for skin and hair care products and have great potential for future cosmetic use.

Keratin proteins are crucial for healthy skin, but mutations can cause skin disorders with no effective treatments yet.

Androgens cause skin issues like acne and hair growth in women, often due to PCOS, and can be treated with medication and lifestyle changes.

Inactive hair follicle stem cells help prevent skin cancer.

Celiac disease can cause skin problems that may get better with a gluten-free diet.

Brg1 is crucial for hair growth and skin repair by maintaining stem cells and promoting regeneration.

Face-lifts can lead to complications like bleeding, nerve injury, skin death, hair loss, and rare infections, with careful surgery reducing risks.