Function of Beauty Curly Hair Shampoo: Full Review and Real Results

Curly hair demands a shampoo that cleanses without stripping natural oils, defines curls without weighing them down, and hydrates without causing buildup. Function of Beauty’s Curly Hair Shampoo promises to deliver exactly that—a customized wash experience tailored to your unique curl pattern. But does it live up to the hype? In this full review, we break down the formula, application, results, and how it fits into a complete curly hair routine.

Whether you have loose waves or tight coils, finding the right shampoo is the foundation of healthy curls. We tested the Curly Hair Shampoo over several weeks, paying close attention to lather, scent, moisture retention, and curl definition. Let’s dive into the details so you can decide if this is the shampoo your curls have been waiting for.

First Impressions: Packaging and Scent

The Curly Hair Shampoo arrives in Function of Beauty’s signature minimalist bottle, which is both sleek and functional. The pump dispenser makes it easy to control the amount you use—no more messy pouring or wasted product. The bottle is also fully customizable with your name or a short message, adding a personal touch that makes the experience feel special.

The scent is a highlight: a light, natural fragrance that isn’t overpowering. It’s clean and fresh, without the heavy perfume that can sometimes irritate sensitive scalps. During our test, the scent lingered subtly in the hair after rinsing, which was pleasant without being cloying. For those who prefer fragrance-free options, Function of Beauty also offers an unscented version.

Ingredients and Formula: What Makes It Work for Curls

What sets the Curly Hair Shampoo apart is its sulfate-free, silicone-free formula. Sulfates can strip curly hair of its natural moisture, leading to frizz and dryness, while silicones can cause buildup that weighs curls down. Instead, this shampoo uses gentle cleansing agents derived from coconut and other natural sources, which remove dirt and excess oil without disrupting the hair’s moisture balance.

Key ingredients include glycerin for hydration, aloe vera to soothe the scalp, and a blend of nourishing oils that help maintain elasticity. The formula is also free from parabens, phthalates, and artificial dyes, making it a safe choice for color-treated or sensitive scalps. For those with coily textures, pairing this shampoo with the Coily Hair Conditioner creates a balanced, hydrating routine that enhances curl definition and reduces breakage.

• Sulfate-free and silicone-free to prevent moisture loss and buildup
• Contains glycerin and aloe vera for gentle hydration
• Free from parabens, phthalates, and artificial dyes

How to Use the Curly Hair Shampoo for Best Results

Using the Curly Hair Shampoo is straightforward, but a few tips can maximize its benefits. Start by thoroughly wetting your hair, then apply a quarter-sized amount to your scalp. Massage gently with your fingertips—not your nails—to stimulate circulation and lift dirt. Focus on the scalp rather than the lengths, as the suds will naturally travel down the hair shaft when you rinse.

For thicker or longer curls, you may need a second application. Follow up with the Curly Hair Conditioner Jumbo for deep moisture, especially if you have high-porosity hair. After washing, apply a leave-in product like the Custom Leave-in Conditioner to seal in hydration and define your curls. This three-step routine—shampoo, conditioner, leave-in—helps maintain curl health between washes.

• Use lukewarm water to avoid stripping natural oils
• Focus shampoo on the scalp, not the ends
• Follow with a conditioner and leave-in for best moisture retention

Real Results: What We Observed After Four Weeks

After four weeks of using the Curly Hair Shampoo twice a week, we noticed several positive changes. Curls appeared more defined and less frizzy, even on humid days. The hair felt softer and more elastic, with fewer tangles during detangling. Scalp irritation, which was a concern for one tester with a sensitive scalp, diminished significantly thanks to the gentle formula.

One tester with wavy-curly hair reported that the shampoo helped reduce buildup from previous styling products, allowing their natural wave pattern to come through more clearly. Another with coily hair appreciated that the shampoo didn’t leave their hair feeling stripped or brittle. For those who travel, the Getaway Kit offers a convenient way to maintain the same routine on the go.

How It Compares to Other Curly Hair Shampoos

Compared to drugstore curly hair shampoos, Function of Beauty’s offering stands out for its customization and clean ingredient profile. Many mass-market shampoos still rely on sulfates and silicones, which can be problematic for curly hair over time. The Curly Hair Shampoo provides a gentler alternative without sacrificing cleansing power.

In terms of price, it sits in the mid-to-premium range, but the quality of ingredients and the ability to personalize the formula (by choosing your hair goals and fragrance) add significant value. For those who prefer a larger size, the Straight Hair Shampoo Jumbo is available for straight hair types, while the Curly Hair Shampoo is designed specifically for curls. The Mini Comb is a handy tool for detangling after washing, especially for fine or medium curl patterns.

• More customizable than most curly hair shampoos
• Cleaner ingredients compared to many drugstore options
• Available in multiple sizes and with personalized options

The Function of Beauty Curly Hair Shampoo delivers on its promise of a gentle, effective cleanse that enhances curl health. With thoughtful ingredients, a pleasant scent, and real results after consistent use, it’s a strong contender for anyone looking to upgrade their curly hair routine. To see the difference for yourself, explore the Curly Hair Shampoo and build a customized regimen that works for your unique curls.