Hair Shine Is a Moving Target
Hair shine is not a substance. It is an optical event produced by fibers, color, alignment, illumination and view.
All in view
Hair
Hair as shape, texture, light, movement and cultural signal, with practical intelligence and a clear eye for what makes a choice work.
Your Hair Part Has No Personality
Thousands of judgments found no universal character hiding in a left or right hair part. Personal preference survived anyway.