Because this is an occlusive ingredient, whether it causes clogging and irritation of pores and prevents other ingredients from being absorbed into the skin has been a subject of controversy. The truth is that silicone is a non-comedogenic and non-allergenic component. You can even consider them 'cleaner' because dimethylsiloxane is purely synthetic. Vegetable oils and butters can actually be very complex in composition, are squeezed from plants and are more likely to contain potential allergens.

In addition, it does have a blocking effect, but this is actually a basic function of a moisturizer, and it is not as scary as ‘sticking a plastic film to your face’.

Polymethylsiloxane has actually been included in the FDA's patent for skin protection drug products (I know this is very breaking my knowledge, but we are constantly evolving and upgrading our knowledge). But for any one ingredient, Amanda recommends that everyone do a skin test first to confirm that there is no overreaction in use.