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Naturally coarse African-American hair can feel more brittle after a dye job. While you should be extra careful not to break strands, you also must maintain hair health with the right shampoo. Wash your hair when you feel that it's dirty, and always follow up with a conditioner for color-treated hair.
Pureology
Celeb stylist Derek J. -- known for styling Kandi Burruss and Nicole Ari Parker -- favors Pureology shampoo for dyed African-American hair. He recommends the company's Hydrate line of shampoos and conditioners to keep dyed hair moisturized and healthy. Healthy hair won't frizz up, break off or otherwise stress your style.
DevaCurl
Allure editors love DevaCurl's No Poo for natural African-American hair. DevaCurl's products keep curled hair hydrated so it doesn't frizz up post-shower. Women with color-treated hair can use DevaCare No Poo, specially designed for dyed hair. This mild lathering cleanser won't fade color-treated hair and won't make natural African-American hair frizzy. It's a win-win all around.
General Recommendations
If you can afford to splurge on a designer shampoo that will pamper your hair, do so. For times when you've got designer taste on a frugalista budget, know what you can get away with. At minimum, you need a product intended for color-treated hair. These help maintain your new color and are gentle enough to not strip moisture from dry, dyed locks. Adding a nourishing pre-shampoo treatment into your routine can help naturally coarse African-American hair hang onto moisture to feel soft and smooth.
Tips
With either expert-tested product, the right technique is key. Don't scrub too hard when you shampoo, because that damages the hair. Gently massage the shampoo over the hair and scalp, working up a light lather. When it's time to rinse out, press the suds out of your hair. Don't squeeze or rub the hair when rinsing. Hair is weakest when wet, so a heavy hand can lead to breakage.

