I’ve tried my fair share of haircare products, but this $22 Korean hair growth serum with a built-in brush has caught my attention for all the right reasons.

Korean haircare was surprisingly one of the beauty categories I purchased the most of while I was in Seoul. While K-beauty is often associated with innovative skin care and glass-skin essentials, I quickly discovered that its haircare offerings deserve just as much attention. From scalp treatments to nourishing shampoos, there are plenty of clever products designed to make a difference in your routine without adding unnecessary steps.

One product that stands out is the Lilyeve GROWTURN Exosome Hair Growth Serum with Built-In Brush. With more than 20,000 shoppers reportedly picking it up, it’s an intriguing find for anyone looking to give their scalp a little extra care without spending a fortune.

On sale for $22, the serum combines a targeted scalp treatment with a built-in brush applicator, making application feel more convenient than using a traditional dropper. Instead of squeezing product onto my fingertips and trying to distribute it evenly, I love the idea of being able to apply the formula directly to the scalp.

The brush design also makes it easier to work the product through specific areas, especially around the roots.

The focus on scalp care is what really appeals to me. Healthy-looking hair starts with a scalp that gets the attention it needs, and I’m always interested in products that help support that foundation. The GROWTURN serum is formulated with exosomes and caffeine, ingredients featured in many modern scalp-care products. Its non-greasy, fragrance-free formula is another plus for anyone who prefers a lightweight treatment that won’t leave their roots feeling coated or overly perfumed.

I’m also drawn to products that help volumize the scalp naturally by supporting a healthier-looking foundation for fuller hair. While no serum can guarantee hair growth or overnight results, a targeted scalp-care product can be a useful addition to a consistent haircare routine.

At this price point, the Lilyeve GROWTURN serum feels like an accessible way to experiment with a more scalp-focused approach to haircare. The built-in brush is a particularly practical touch, turning application into a more streamlined step rather than another complicated part of getting ready.

So, if you’re curious about Korean haircare or looking for a convenient scalp serum to add to your routine, this is one product I’d put on my radar. For less than $25 on Amazon, it offers an interesting combination of targeted application, lightweight positioning, and a trend-forward formula — all without requiring a major investment.

What are the main active ingredients in Lilyeve GROWTURN Serum?

It contains caffeine, heartleaf exosomes, biotin, panthenol and cooling menthol to nourish, soothe, and fortify the scalp.

Who is this scalp serum best suited for?

It’s ideal for K-beauty fans and anyone experiencing fine hair, postpartum shedding, scalp flakiness or dryness.

How do you use the built-in brush applicator?

Twist the head to ON, squeeze serum onto targeted areas, lock to OFF and massage using the soft bristles.

How often should you apply the scalp serum?

Apply it twice daily, every morning and evening, continuously for optimal scalp health results.

When should you apply it and does it require rinsing?

Apply to towel-dried damp or dry hair anytime; as a leave-in treatment, no rinsing is required.

Does this serum leave hair feeling greasy or heavy?

No, the fast-absorbing formula leaves zero heavy or greasy residue, keeping hair clean and voluminous.

Is it safe for sensitive and fragrance-averse scalps?

Yes, it is fragrance-free, dermatologist-tested, and gentle enough for sensitive or allergy-prone scalps.

This article was written by Victoria McDonnell, New York Post Commerce Journalist & Content Strategist, who has spent countless hours researching, testing hundreds of products and comparing the latest makeup, skincare, hair and beauty items and trends to determine what’s truly worth your hard-earned cash. She evaluates formulas, textures, ingredients and more, in addition to consulting medical and industry experts. Some of Victoria’s latest conquests include testing the best sheet masks on the market, and a rinse-and-repeat review of the best shampoos for all hair types and budgets. Victoria, who received a beauty industry essentials certification from the Fashion Institute of Technology, has been creating shopping guides for the New York Post since 2021 and previously held positions at Insider Reviews and CNN Underscored.