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Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.

The treatment effectively repairs and strengthens damaged hair by restoring natural lipids.

Hair straightening changes hair structure and can cause damage if done wrong, but improvements in the methods are expected to continue.

Ultrasonic and infrared treatments can improve hair strength and appearance with minimal damage.

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.

A new perming method is less damaging to hair and works as well as traditional methods.

Protein carbonylation is a sensitive marker for oxidative damage in hair, especially from light exposure.

Hair cuticles remain stable and resilient under stress due to strong protein content and crosslinking.

Modified keratin binds better to hair, especially bleached hair.

AP collagen peptides improve hair elasticity and gloss.

Male sexual differentiation is regulated independently, while female differentiation occurs in an androgenic environment, affecting conditions like congenital adrenal hyperplasia.

Hair straightening methods have advanced to improve effectiveness and reduce damage, but still rely on heat and chemicals.

Hormonal contraceptives can help treat acne by affecting sebum production and androgen levels.

Plasma protein binding significantly affects glucocorticosteroid concentration in blood, saliva, and hair.

The guideline offers recommendations for diagnosing and managing PCOS and its complications.

Some skin conditions are common during pregnancy and can be safely treated without affecting the pregnancy outcome.

Women experience various skin issues at different life stages, requiring careful treatment and awareness.

Recognizing and treating pregnancy-related skin conditions is important to reduce health risks for mothers and babies.

Pregnancy can cause various skin changes and diseases, requiring careful treatment to protect the baby.

Pregnancy can cause skin changes and affect existing skin conditions, with limited treatment options due to the need for fetal safety.

A new method strengthens hair without using harmful chemicals.

Heat worsens damage in chemically treated hair, especially bleached and straightened hair.

Using β-cyclodextrin derivatives improves the solubility and bioavailability of steroidal drugs.

Developing human skin has immune cells with memory-like features.

Lipocalin-Type Prostaglandin D2 Synthase (L-PGDS) is a protein that plays many roles in the body, including sleep regulation, pain management, food intake, and protection against harmful substances. It also affects fat metabolism, glucose intolerance, cell maturation, and is involved in various diseases like diabetes, cancer, and arthritis. It can influence sex organ development and embryonic cell differentiation, and its levels can be used as a diagnostic marker for certain conditions.

New pyrazole derivatives may help treat hair loss, but more testing is needed.

Different substances that activate or block the androgen receptor can affect male development and treat conditions like prostate cancer.

Late pregnancy helps repair brain damage in rats due to the GABAergic system.

Retinoids are important for treating skin conditions but should be used with caution due to serious side effects and risks during pregnancy.

Human hair has a protective lipid layer that can be damaged by moisture and treatments, affecting hair growth and health.