If You Have: Oily Hair
While most shampoos remove a day’s worth of grease, they won’t address the source of the problem: The excess production of sebum, your skin’s natural oil. If you can’t go a day without washing your hair (lest it turn into greasy noodles), you can train your scalp to produce less oil with a shampoo that normalizes sebum production, like Davines Rebalancing Shampoo.
If You Have: Dry Hair
In contrast, if your hair is extra dry, a rich infusion of oil is exactly what you need. Many shampoos are formulated with moisturizing oils (like argan or sunflower oil), but Number 4 Hydrating Shampoo takes things one step further, using a specialized blend of extracts—from black currant to ocean algae—to not only moisturize hair, but to lock that moisture in.
If You Have: Thinning Hair
If you’re starting to see the effects of a thinning or receding coif, a specialized shampoo is the easiest way to fight back. While there are several proven methods for a shampoo to combat hair loss (improving scalp circulation, reducing sebum production) the most effective strategy is the reduction of DHT, the hormone responsible for naturally thinning hair. Davines Energizing Shampoo and Billy Jealousy Fuzzy Logic Shampoo are two solid choices.
If You Have: Flat Hair
Whether you call it “flat,” “thin,” or just plain “flimsy,” hair that lacks volume can take the punch out of any hairdo. A texturizing styler will help in the short-term, but to induce some natural volume, look for a shampoo that’s high in fortifying nutrients, like vitamins, amino acids, and keratin. Baxter of California Daily Protein Shampoo is made with all three.