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Pig skin is a good substitute for human skin to measure drug absorption, but differences in skin structure and enzymes across species must be considered.

Hair follicles may soon be used more for targeted and systemic drug delivery.

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.

The hydrogel with a 1:3 ratio of hydroxyethyl cellulose to hyaluronic acid is effective for delivering drugs through the skin to treat acne.

UV radiation can help sterilize wounds and promote healing but requires careful use to avoid damaging cells.

Liposomes better deliver minoxidil for hair loss treatment than niosomes.

Squalene-based carriers improve delivery of a treatment to hair follicles for alopecia areata.

Multiphoton microscopy is a promising tool for detailed skin imaging and could improve patient care if its challenges are addressed.

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

Chitosan microparticles improve minoxidil sulphate delivery, potentially reducing daily applications.

The skin is the largest organ, protecting the body, regulating temperature, and producing hormones.

Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.

Using a special laser can improve how well hair loss treatments get into the skin and hair follicles.

Microneedling is a safe and effective way to improve various skin conditions with minimal side effects.

The tropical legume Sesbania rostrata can form nodules in waterlogged conditions using a different method that involves plant hormones and specific genes.

Bimatoprost can cause longer, thicker, darker eyelashes and eyebrows.

Using systemic drugs as creams for skin conditions shows promise, but more research is needed to confirm their effectiveness and safety.

Some chemicals absorbed through the skin can cause serious health problems.

Nanotechnology improves cosmetics' effectiveness and safety.

Surface and internal treatments can help prevent hair lipid loss during washing.

Finasteride delivery through skin improved using invasomes and iontophoresis.

Liposomes improve the delivery and effectiveness of cosmetic ingredients but face challenges like cost and stability.

Hair texture changes with age due to varying levels of lipids.

Recombinant human epidermal growth factor is versatile, effective, and safe for long-term skin and mucosal treatments.

Skin cell-derived vesicles can help heal skin injuries effectively.

Hair absorbs molecules differently based on their size, charge, and love for water, and less at higher pH; this can help make better hair products.

Synthetic polypeptides in cosmetics may help with anti-aging, but their effectiveness on real skin is uncertain.

Topical booster improves hair loss treatment effectiveness.

Skin structure complexity and variability are crucial for assessing skin toxicity in safety tests.

Plant-derived extracellular vesicles show promise for treating diseases like cancer and inflammation.