1. ↑ Sodium benzoate. Sodium Benzoate is used in skincare and cosmetics as a/an anti-corrosive, that masks the scent of other ingredients in a formula aka masking, preservative ingredient.
2. ↑ citric acid ( Sodium citrate ) mainly used as a cleaning agent & preservative; pH adjuster; in higher concentration it's an AHA (in peels & antiaging products)
3. ↑ collagen ( Soluble collagen ) humectant moisturizer; film-former; has never been shown to have a direct effect on producing or building collagen in skin