Curly or straight: What determines hair shape?

Whether you are sporting curly locks or poker-straight hair is determined by the shape of your hair follicle and the behavior of a host of cells.

Combing human genome reveals roots of hair diversity, Genetics

The Ultimate Wavy Hair Guide – Curlsmith USA

The Ultimate Guide to Men's Hair Types: How to Identify and Style Them – BluMaan

12 Hair Types Explained & How To Identify And Care For Yours

Why does hair sometimes become curlier or straighter as people get older? - The Tech Interactive

From straight to curly, thick to thin: here's how hormones and chemotherapy can change your hair

STRAIGHT or CURLY Hair? Best Hairstyles for Your FACE

安心の海外正規品 hair curl/ straight - 美容家電

Learn the Science of Curly Hair

安心の海外正規品 hair curl/ straight - 美容家電

Natural Hair Texture and Type Chart: How to Find Yours

Hair Transplants for Curly Hair Houston, Texas