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L'Oréal's research and workshops have advanced understanding and tailored cosmetics for African hair and skin.

PepACS offers a safer, eco-friendly way to perm, dye, and repair hair.

Hair fibers may have a unique, non-protein sheath not previously identified.

Lipids are crucial for healthy hair, protecting it from damage and breakage.

Hair care products can cause skin irritation and allergies.

Melanin-rich skin has unique challenges in diagnosing and treating skin diseases.

Hair breaks differently when wet or dry and is affected by its condition and treatments like perms and bleaching.

The chapter explains why and how women remove unwanted hair, comparing methods like shaving and waxing.

Silicone pretreatment protects hair from damage and reduces color fading without interfering with bleaching or dyeing.

Chemical treatments and UV radiation severely damage the lipid layer on hair.

Sun exposure after laser hair removal can cause skin darkening, which is hard to treat and requires avoiding UV light.

Disulfide bonds are crucial for hair's strength, especially when wet.

Citric acid strengthens and improves damaged hair.

Chemical treatments can change the scale heights of wool and cashmere fibers, affecting their identification.

5% minoxidil foam effectively regrows hair in women, with postmenopausal women seeing the most improvement.

Nanomaterials can make hair care products work better and safer.

Some new treatments for children's skin conditions are effective, but risks must be weighed.

Advances in genetics may lead to targeted treatments for hair disorders.

Laser hair removal works well for people with dark hair and light skin, but it's less effective for light hair or dark skin; improvements are expected.

Scientists made glow-in-the-dark dots from human hair that can detect iron, prevent counterfeiting, and reveal fingerprints.

AFM helps study hair surfaces for dermatology, cosmetics, and forensics.

Hyperpigmentation is common in pregnancy and may not fully fade after birth; melasma, also frequent, can persist but has limited treatment options during pregnancy.

Eating the right foods can improve hair health by reducing damage and providing proper nutrients.

Hair care products don't cause hair loss if used correctly.

Herbal cosmetics are becoming more popular because they are safer, have fewer side effects, and offer health benefits.

People with lupus and rheumatoid arthritis have thinner hair than healthy people.

The girl has both monilethrix and Type 1 diabetes, but no link between the two conditions is known.

Surfactants damage hair, but sealing the cuticle can prevent this.

Oral contraceptives often cause melasma and other skin issues.

Castor oil can cause severe hair matting.