Today (thankfully), its use is in decline, although it can still be found in some shampoos, hair products and nail hardeners. It should also be noted that a number of other preservatives while not actually formaldehyde do still release formaldehyde chemical.
Check the label of any of your existing products to see if they contain formaldehyde or a formaldehyde releasing ingredient.
We believe that formaldehyde is an unsuitable ingredient for use in any skin product or shampoo — period. Formaldehyde releasers in our view are also unnecessary given the availability of better less irritant ingredients
“In animal and human testing, formaldehyde has been found to be a strong allergen”
“…an irritant, sensitizer and potential carcinogen. In Sweden and Japan, it is now prohibited in cosmetics”