The Real Difference Between Lotion And Moisturizer

This just in: "moisturizer" is not just a fancier word for "lotion." As it turns out, there is quite a significant difference between them — one that could change your skincare routine entirely. You might have thought that moisturizers should be used on the face, while lotions should be used on the body. This isn't necessarily untrue, but the differences between these two types of products lie in the formulation — more specifically, the water content. 

Lotions contain more water than moisturizers, creating a thinner, less emollient formula. The low viscosity of a lotion makes for a light hydrator that doesn't leave skin feeling heavy or sticky. Lotions also typically contain more preservatives (more water = higher risk of bacteria) as well as added fragrance. For these reasons, lotions are often better suited for the body, as they can cause irritation when applied to the face (via Dermstore). However, if you're looking for deep hydration, moisturizers are almost always the way to go — regardless of where you plan on applying it.

Because moisturizers are oil-based, they not only better hydrate the skin but help protect it. Kenneth Mark, MD, a board-certified dermatologist and Mohs skin cancer surgeon, tells Real Simple that moisturizers "have the greatest emollient effect", meaning they increase moisture levels in the skin. "They also can create a barrier between the skin and the environment to help seal moisture into the skin," he explains. 

The nourishing properties and thick consistency of moisturizers make it much more effective at hydrating the skin while being less likely to irritate it. Lotions, on the other hand, may offer temporary hydration but won't do much to protect the skin over time. Because of this, moisturizers are usually a better option than lotions when treating dry, dehydrated skin. However, Dr. Mark adds that lotions might be more beneficial when moisturizing hairy parts of the body, as they are thinner and therefore easier to rub in. 

Lotions can also come in handy if you have oily, acne-prone skin or are in warmer climates. According to Dermstore, "Water-like textures are best for humid areas so as to not clog pores and prevent your makeup from slipping and sliding in the heat." 

Essentially, both lotions and moisturizers have their benefits, but if you're looking for long-term hydration, oil-based moisturizers are the way to go.