If you actually read the full report that was linked to it actually shows that Johnsons are not the worst products for these non-proven carcinogenic substances and quoting from the same research website "Even top-selling brands in the natural products sector have been found to contain 1,4-dioxane, a synthetic chemical carcinogen."
These studies are also based in America, in the UK we have got policies in place so that cosmetic companies can not add more than what is classed as safe levels of these chemicals to products.
I do think that it is each to their own when it comes to what you want to use on yourself and on your child but I studied Immunology and one or two reports/news stories would not be classed as proof that these products can do any damage, it takes hundreds of studies over many years to determine whether or not a product is harmful so I don't think that scaring people by quoting news articles is going to help.
these reports are of studies conducted over many years, and of course i've read the full reports, i would never read part of something and then link it.
here is fact, ingredients in johnson's baby shampoo:
PEG-80 Sorbitan Laurate, Fragrance, PEG-150 Distearate, Quaternium-15, Cocamidopropyl Betaine, Citric Acid Aveeno Baby Wash & Shampoo, Tear Free - PEG-80 Sorbitan Laurate, Fragrance, PEG-150 Distearate,Cocamidopropyl Betaine, Sodium Laureth Sulfate Aveeno Baby Wash & Shampoo - PEG-80 Sorbitan Laurate, Fragrance, PEG-150 Distearate, Cocamidopropyl Betaine, Sodium Laureth Sulfate
plus animal testing.
ingredients in Dr. Bronner's Castile Liquid Soap Baby Mild:
Water, Saponified Coconut-Hemp-Olive Oils (with retained Glycerin), Aloe Vera, Olive Fatty Acids, Rosemary Extract.
no animal testing, 100% organic, LESS EXPENSIVE than J&J
tbh i don't use soap on my 7 month old baby yet, but when i do it'll be something like the latter.
as always, to each her own. do what you feel is right for you and your baby, etc. i'm genuinely sorry if anything i've said "scare mongered" anyone, was not my intention AT ALL, nor did I mean to incite any sort of debate. just presenting a different POV, and trying to answer OPs question.