IGK First Class Detoxifying Charcoal Shampoo The new IGK First Class Detoxifying Charcoal Shampoo ($27) absorbs excess oil, styling-product residue, pollution particles, and dead skin cells. Hair is left cleaner — thanks to the activated charcoal — and scalps are soothed with the witch hazel and tea tree oil also in there. Image Source: sephora.com IGK First Class Detoxifying Charcoal Shampoo $27 from sephora.com Buy Now