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Kristina recently reviewed Fekkai's Brighten & Boost Shampoo. They noted that the shampoo has a pleasant citrusy-orangie scent and that it did help to brighten their blonde hair. However, they also noted that the shampoo left their hair feeling dry and that they would suggest using a good moisturizing conditioner or deep conditioner treatment afterwards, and only using the shampoo once or twice a week. Overall, Kristina found the shampoo to be effective in brightening their hair, but suggested caution when using it due to its drying effects.