If you’ve ever had your hair relaxed, you know it’s a whole different ballgame when it comes to care. The chemical process that straightens your curls can leave your hair feeling dry, fragile, and just… not as lively as it used to be. That’s where a good hair serum steps in—kind of like a little miracle in a bottle that helps bring back softness, shine, and manageability. But with so many options out there, how do you pick the best serum for relaxed hair? Let’s dive in.
Why Serums Are a Must for Relaxed Hair
Relaxed hair isn’t just straight hair; it’s hair that’s been chemically altered, which means the natural oils and proteins that keep it healthy are often stripped away. This leaves your strands thirsty and vulnerable. You might notice more frizz, breakage, or dullness than before. A serum acts like a shield and moisturizer all in one—it smooths down the cuticle (the hair’s outer layer), locks in moisture, and protects against heat and environmental nasties.

Think of it as a little armor for your hair that also makes it look glossy and smooth. But not all serums are created equal, especially for relaxed hair, which needs something lightweight but effective.
My Top Picks for Relaxed Hair Serums
Here are some of the serums that have been game changers for many with relaxed hair:
- TGIN Argan Replenishing Hair & Body Serum – This one’s a classic. It’s packed with argan and coconut oils, which are fantastic for adding softness and shine without feeling heavy. I love how it tames frizz without making my hair greasy. Just a heads-up: if you’re sensitive to coconut oil, maybe test it out first.
- Bio-Pilixin Serum – This is more than just a serum; it’s like a little science experiment for your scalp. It uses stem cell tech and plant growth factors to actually help your hair grow thicker and stronger. I’ve heard from folks who saw results in just over a month, which is pretty impressive.
- Soapbox Argan Oil Smoothing Serum – If frizz is your nemesis, this might be your new best friend. It’s lightweight, smells great, and really smooths down flyaways. Plus, argan oil is a superstar ingredient for hydration.
- Kérastase Première Repairing Anti-Frizz Serum – This one’s a bit pricier but worth it if you use heat tools a lot. It protects your hair from damage and repairs some of the wear and tear that comes with styling. It keeps hair shiny and frizz-free for days.
- Onesta Hair Care Plant-Based Luma Oil Serum – For those who prefer vegan and natural products, this serum blends coconut oil, aloe, and shea butter. It’s super hydrating and controls flyaways without any harsh chemicals. Plus, it’s gentle enough for sensitive scalps.
Picking the Right Serum for Your Hair
Not all relaxed hair is the same, and neither are serums. Here’s a quick rundown of what to consider:
What to Consider | Why It Matters |
---|---|
Hair Porosity | If your hair absorbs moisture quickly (high porosity), you might want a richer serum. For low porosity, lighter formulas work better. |
Scalp Sensitivity | Some serums can irritate sensitive scalps, so fragrance-free or gentle options are safer. |
Ingredients | Look for nourishing oils like argan or jojoba, plus strengthening ingredients like peptides or niacinamide. |
Your Hair Concerns | Whether it’s frizz, breakage, or slow growth, pick a serum that targets your main issue. |
Heat Styling | If you use heat tools often, choose serums with heat protection. |
Why You’ll Love Using Serum on Relaxed Hair
Honestly, once you get into the habit of using a serum, your hair will thank you. Here’s what you can expect:
- Frizz? What frizz? Serums smooth your hair’s surface, making it look sleek and polished.
- Bye-bye dryness. They lock in moisture so your hair doesn’t get brittle or break easily.
- Heat styling without the guilt. Many serums protect your hair from the damage of blow dryers and flat irons.
- Shiny, shiny hair. Serums give your strands a natural glow that looks healthy and vibrant.
- Stronger strands. Ingredients like peptides help repair damage and keep your hair resilient.
How to Use Hair Serum Like a Pro
Here’s a simple routine that works well:
- Start with freshly washed, conditioned hair.
- While your hair is still damp, take a small amount of serum—usually a pea-sized drop—and rub it between your palms.
- Apply from the middle of your hair down to the ends. Avoid the roots unless your scalp is dry.
- If your hair feels dry later in the day, a tiny bit on dry strands can smooth flyaways and add shine.
- Planning to use heat tools? Apply serum before styling for protection.
- Don’t go overboard—too much serum can weigh your hair down or make it look oily.
Common Questions About Serums for Relaxed Hair

Q: Can I use serum every day?
A: Yes, most serums are gentle enough for daily use, but keep an eye on how your hair feels. If it starts looking greasy, cut back a bit.
Q: Is coconut oil serum good for relaxed hair?
A: Coconut oil is great for hydration but can cause buildup for some. If you notice your hair getting heavy or your scalp itchy, try a serum without coconut oil.
Q: Will serum help my hair grow?
A: Serums mainly improve hair’s appearance and manageability, but some, like Bio-Pilixin, have ingredients that support growth by nourishing your scalp.
Q: How is serum different from oil or leave-in conditioner?
A: Serums are usually lighter and focus on smoothing and protecting. Oils are thicker and seal moisture, while leave-ins hydrate and detangle.
Q: Does serum protect from heat damage?
A: Many do! Look for serums that mention heat protection if you use styling tools often.

Some Related Terms You Might See
Hair serum for chemically treated hair, anti-frizz serum for relaxed hair, moisturizing serum for dry relaxed hair, heat protectant serum, lightweight serum, hair growth serum, shine enhancing serum.
A Quick Comparison of My Favorite Serums
Serum | Benefits | Main Ingredients | Best For | Price |
---|---|---|---|---|
TGIN Argan Serum | Softens, smooths, non-greasy | Argan oil, coconut oil | Dry, frizzy hair | $15–$20 |
Bio-Pilixin | Promotes growth, strengthens | Capilia Longa, niacinamide | Thinning hair | $50–$60 |
Soapbox Argan Serum | Controls frizz, adds shine | Argan oil | Daily frizz control | $10–$15 |
Kérastase Anti-Frizz | Heat protection, repairs | Peptides, glycine | Heat-styled hair | $40–$50 |
Onesta Luma Oil | Hydrates, controls flyaways | Coconut oil, aloe, shea butter | Sensitive scalp, all hair types | $25–$30 |
Wrapping It Up
Relaxed hair definitely needs a little extra TLC, and a good serum can make a world of difference. Whether you want to tame frizz, boost shine, protect from heat, or even encourage growth, there’s a serum out there that fits your needs. Just remember to listen to your hair and adjust how much and how often you use it. With the right serum in your routine, your relaxed hair can look smooth, shiny, and healthy—just the way you want it.