Are keratin hair straightening products safe?

Moxie must know…Brazilian Blowouts were found to release formaldehyde. Are the Keratin-based hair-straightening products that I see stylists in salons doing that much safer on hair/environment? The Beauty Brains respond The safety concerns regarding high levels formaldehyde in hair straightening prdoducts has been well documented and inhaling large quantities of formaledhyde gas is a legitimate […] from The Beauty Brains