Water is also the delivery system for everything else you put on your face. Your vitamin C serum, your hyaluronic acid, your retinol—they all need water to travel into your skin. Without water, they’re just expensive goop sitting on top of your face.
Think of your skin as a garden. Water is the rain that makes the soil soft. Your serums are the fertilizer. You can’t fertilize concrete. You need to soften it with water first.
A Quick Cheat Sheet (No PhD Required)
If you want to win the water game, do this: Drink water throughout the day. Not just when you’re thirsty. Thirst means you’re already dehydrated. Also, apply a water-based toner or mist before your moisturizer. And finally, use a humidifier in your room at night, especially if you run the AC or heater.
Your face is basically a plant. Treat it like a thirsty fern, and it will love you forever.