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Removing external lipids from hair reduces moisture and increases strength, while removing internal lipids decreases water permeability.

Genetic defects and UV radiation cause skin damage and aging.

Hair changes could indicate neurological diseases and help monitor treatment.

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

The skin is a complex barrier for drug penetration, but understanding its structure and interactions can improve drug delivery methods.

Liposomal systems show promise for delivering drugs through the skin but face challenges like high costs and stability issues.

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.

Microneedles improve drug delivery in various body parts, are safe and painless, and show promise in cosmetology, vaccination, insulin delivery, and other medical applications.

Fat-derived stem cells show promise for skin repair and reducing aging signs but need more research for consistent results.

Janus kinase inhibitors are promising treatments for autoimmune skin diseases like eczema and psoriasis.

Vitamin D has potential benefits for cancer prevention, heart health, diabetes, obesity, muscle function, skin health, and immune function, but clinical results are mixed and more research is needed.

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

The document concludes that dandruff and seborrheic dermatitis are linked to inflammation and skin changes, and treating them with specific shampoos can reduce these issues.

Inherited ichthyoses cause widespread skin scaling and thickening due to gene mutations.

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.

Plant cell culture is a promising method for creating sustainable and high-quality cosmetic ingredients.

Some birth control pills have a higher risk of blood clots than others.

Nanoparticles can enter the skin, potentially causing toxicity, especially in damaged skin.

Ablative fractional resurfacing could improve how well topical drugs penetrate the skin, but more research is needed to fine-tune the method.

The document concludes that recognizing and properly diagnosing lipodystrophy syndromes is crucial for effective management and treatment.

Hair analysis for drugs needs a better understanding of how drugs enter hair, considering factors like hair structure and pigmentation.

The article concludes that advancements in hair cosmetics require dermatologists to stay informed about products and their potential risks, including allergies and higher risks for hairdressers.

New treatments targeting skin stem cells show promise for skin repair, anti-aging, and cancer therapy.

MALDI Imaging Mass Spectrometry is a useful method for studying skin conditions, but sample preparation is crucial for accurate results.

Peppermint oil can effectively promote hair growth without being toxic.

The document concludes that understanding hair follicles requires more research using computational methods and an integrative approach, considering the current limitations in hair treatment products.

Certain transporters are found in human hair follicles and may affect hair growth and loss.

New physical methods like electrical currents, ultrasound, and microneedles show promise for improving drug delivery through the skin.

The guide explains how to study human skin fat cells and their tissue, aiming to improve research and medical treatments.