US Proposed Class Action: Preservative Choice Makes Unilever’s TRESemme Keratin Products ‘Defective’

The presence of formaldehyde releaser DMDM hydantoin in TRESemme Keratin shampoos pose undisclosed risks of hair loss and/or scalp irritation, as shown by hundreds of consumer complaints online, plaintiffs allege in proposed class actions filed in Illinois and New Jersey federal courts.