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Skin aging is largely due to differences in stiffness and elasticity between skin layers, leading to wrinkles.

The skin has multiple layers and cells, serves as a protective barrier, helps regulate temperature, enables sensation, affects appearance, and is involved in vitamin D synthesis.

The Cell Membrane Complex in hair has both water-attracting and water-repelling layers.

Certain sugars increase in some layers of the hair follicle during the middle of the healing process in rats, which may help improve healing.

Skin-derived stem cells grow faster and are easier to obtain than hair follicle stem cells, but both can become various cell types.

Aging skin shows thinner layers, fewer hair follicles, and new biomarkers like increased space between cells and smaller sebaceous glands.

Wnt3a protein, when packed in liposomal vesicles, can stimulate hair growth and could potentially treat conditions like hair loss.

Trichohyalin is also found in the outer layers of normal human skin.

Fetal wounds heal without scarring because of different biological factors, which could help improve adult wound healing.

A tough membrane between the outer and inner layers of human hair protects it from damage.

Mathematical modeling can improve regenerative medicine by predicting biological processes and optimizing therapy development.

The composite sponge helps heal diabetic wounds by reducing inflammation and promoting new blood vessel growth.

Standardized procedures are crucial for collecting and preparing biological samples to ensure accurate clinical metabolomics results.

The study found new details about human hair growth and suggests that preventing a specific biological pathway could potentially treat hair graying.

New treatments for skin and hair disorders in women of color address unique biological differences and include specific acne medications, sunscreens, skin lighteners, and hair care adjustments.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

Skin can be cooled quickly and safely during laser treatments to protect it without affecting deeper layers.

A new keratin, hK6irs1, is found in all layers of the hair follicle's inner root sheath.

Nano-sized lipid particles increase dexamethasone's skin penetration and create a reservoir in the skin layers.

Human body's immune cells are more common in the layer of fat just beneath the skin than in deeper fat layers.

The skin's basement membrane is specially designed to support different types of connections between skin layers and hair follicles.

Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.

Keratin gene expression helps understand different types of skin cells and their development, and should be used carefully as biological markers.

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

Chemical treatments and daily stresses damage hair, especially the cuticle layer.

Liposomes improve drug delivery and reduce skin irritation in dermatology.

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

Skin and hair can regenerate after injury due to changes in gene activity, with potential links to how cancer spreads. Future research should focus on how new hair follicles form and the processes that trigger their creation.

Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.

MicroRNAs are crucial in controlling cell signaling, affecting cancer and tissue regeneration.