Yes, thick moisturizers are generally excellent for dry skin. Their rich formulas create a protective barrier that helps to lock in moisture and prevent water loss, providing long-lasting hydration and relief from dryness.

The best deep moisturizers for dry skin often contain ingredients like ceramides, hyaluronic acid, shea butter, and occlusives like petrolatum or mineral oil. Look for creams and balms formulated to replenish the skin's natural moisture barrier and provide intense hydration.

There isn't a single universally recognized "no. 1" moisturizer, as effectiveness varies by individual. However, brands like CeraVe, Cetaphil, and La Roche-Posay are frequently recommended by dermatologists for their hydrating and gentle formulas suitable for dry and sensitive skin.

Moisturizers are made thick by the inclusion of ingredients like occlusives (petrolatum, waxes, oils), emollients (shea butter, cocoa butter, fatty acids), and thickening agents (cetyl alcohol, stearyl alcohol, carbomers). These ingredients contribute to a richer, denser texture that provides a protective barrier on the skin.