Hair can easily absorb moisture, too much even, and so it’s important to use leave-in conditioners, moisturizers, and sealers to prevent moisture loss. Products rich in emollients such as fatty alcohols (Cetearyl alcohol, Cetyl alcohol, and Stearyl alcohol), silicones (dimethicone, amodimethicone, cyclomethicone, etc.), proteins and hydrolyzed proteins, fruit and vegetable-derived oils and butters, mineral oil, petrolatum, and polyquaterniums. These help fill gaps in damaged cuticles and protect hair from losing too much moisture.