Figure out your stance on sulfates
Sulfates (like sodium lauryl sulfate and sodium laureth sulfate, which are the strongest surfactants) are known for being stripping and harsh on your hair, but they’re also super excellent at breaking down oil and buildup. So, there’s no right or wrong choice if you decide to opt for a sulfate-free shampoo for oily hair or for a sulfate-filled option—at the end of the day, it just depends on your hair type and goals.
For example, sulfate-filled shampoos are great for super-oily hair once a week or as a “reset” wash once or twice a month, especially if you moisturize your hair afterward with a deep conditioner to reduce dryness. But if you have thick and/or curly hair, you might prefer to go with a sulfate-free shampoo that’s filled with milder (yet still effective) cleansers to help dissolve oils (peep this surfactants list to help you determine which are strong, mild, or gentle). Don’t worry, I’ve included a good mix of both options above, depending on your ~vibes~.
Look for lightweight moisturizers
“Hair products full of rich, heavy ingredients might leave a residue that can make your hair look more oily,” says Dr. Kinler. Instead, look for shampoos with lightweight hydrators, like hyaluronic acid, aloe vera, and jojoba oil. Don't feel like reading the ingredients list? Try looking at the packaging instead. It's not an exact science, but in general, a clear shampoo tends to contain fewer oils and moisturizers than a milky or creamy shampoo. So, when in doubt, go for the clear formula.
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