When it comes to age, most people don't want their hair to give them away! Like skin, the natural aging process affects hair. Overtime, your clients may notice their hair is visibly more gray, dull and flat, while their texture becomes more brittle and wiry. And they don't just want gray coverage, they want natural shades that are flattering and cast a youthful glow on their complexions. As their stylist, you're up for the challenge of making them look as young as they feel on the inside.  

So step aside 50 Shades of Gray, Joico has 10…