Shampoo is classified as a cosmetic product and must adhere to strict safety regulations. For the US market, compliance with the MoCRA (Modernization of Cosmetics Regulation Act) is mandatory, including facility registration and product listing. For the EU market, products must comply with Regulation (EC) No 1223/2009, requiring a Product Information File (PIF) and a Safety Assessment by a qualified toxicologist. Always ensure the formula is free from prohibited substances like certain parabens, phthalates, and formaldehyde releasers.