Preservative free products and surfactant free cleansers?

Lately I see more and more 'preservative-free' products popping up. They don't contain things like phenoxyethanol, parabens etc. But I'm wondering how are the products below preserved, what other ingredients take over the preservative role? And could it be a better option for sensitive skin?

The last 3 products are cleansers for extremely sensitive skin, but how do they cleanse, they just seem to be creams? Are they any good?

Aqua, Pentylene Glycol, Glycerin, Panthenol, Allantoin, Sorbitol, Sodium Gluconate, Citric Acid. (pH 3.6)

Aqua, Glycerine, Panthenol, Butyrospermum Parkii Butter, Cetyl Palmitate, Methyl Palmitate,Olus Oil, Pentylene Glycol, Methylpropanediol, Sodium Polyacrylate, 4-t-Butylcyclohexanol (Trans-Isomer), Glycyrrhiza Inflata Root Extract, Caprylyl Glycol. (pH 6.5, airless-packaging)

Aqua. GLYCERIN. MINERAL OIL. CETEARYL ALCOHOL. OENOTHERA BIENNIS (EVENING PRIMROSE) OIL (OENOTHERA BIENNIS OIL). CAPRYLIC/CAPRIC TRIGLYCERIDE. CETERARYL GLUCOSIDE. AQUAPHILUS DOLOMIAE EXTRACT. ARGININE. CARBOMER. EVENING PRIMROSE OIL :PALM OIL AMINOPROPANEDIOL ESTERS. GLYCINE. SODIUM HYDROXIDE. TOCOPHEROL. WATER (pH 5.5, airless-packaging)

Aqua, Glycerin, Butyrospermum Parkii Butter, Hydrogenated Polydecene, Caprylic/Capric Triglyceride, Cetearyl Alcohol, Dicaprylyl Carbonate, Sucrose Polystearate, Caprylyl Glycol, Glyceryl Stearate, Ascorbyl Palmitate, Helianthus Annuus Seed Oil, Tocopherol, Dimethicone, Sodium Polyacrylate, p-Anisic Acid, Hydrogenated Polyisobutene, Xanthan Gum, Sodium Stearoyl Glutamate, Lecithin, Phenethyl Alcohol, Citric Acid (pH 5.5)

AQUA,  ETHYLHEXYL PALMITATE,  GLYCERIN, DIPROPYLENE GLYCOL, CARBOMER, SODIUM HYDROXIDE. ETHYLHEXYLGLYCERIN, CAPRYL GLYCOL.



Comments

  • edited August 2016
    Some of these contain Caprylyl Glycol which helps preserve. The others I'm not sure about off hand. They could have very low water activity which makes them less reliant on preservatives. One is in an airless pump which also helps reduce the change of contamination. (But they still need some kind of protection.)

    Are they better for sensitive skin? It depends on if you're very sensitive to the preservatives that these formulas lack, like parabens. It also depends if you're sensitive to the other ingredients in the formula. 

    How do the last three cleanse? Rather than using typical foaming surfactants they use oils or esters that will dissolve some kinds of dirt.    
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