If your hair has been feeling limp, frizzy, or just “off,” you might be dealing with a protein or moisture imbalance. Protein treatments can do wonders—but using the right kind for your hair type is key.
Let’s break down exactly what types of protein work best for straight, wavy, and curly hair, and how to know if your hair is craving protein or more moisture.
What Does Protein Do for Hair?
Hair is made up of keratin, a protein composed of amino acids. External factors like heat, coloring, sun, and pollution can break down these proteins, leaving hair weak, brittle, and lifeless.
Protein treatments replenish these broken bonds, helping to:
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Strengthen the hair shaft
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Reduce breakage and split ends
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Improve elasticity
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Restore shine and structure
But too much protein? That can make hair stiff and straw-like. Balance is everything.
Protein vs. Moisture: What Does Your Hair Need?
Here’s how to tell:
| Signs You Need Protein | Signs You Need Moisture |
|---|---|
| Hair feels overly soft or mushy | Hair feels dry or rough |
| Lacks volume and feels limp | Frizzy, dull, brittle |
| High breakage, especially when wet | Hard to detangle or style |
| Curls won’t hold shape | Hair snaps easily under tension |
Quick test:
Take a strand of wet hair and gently stretch it.
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If it stretches and breaks → you need protein
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If it snaps immediately → you need moisture
Types of Protein & Which Hair Type They’re Best For
Not all proteins are created equal. Some penetrate the hair shaft deeply, while others coat the surface to fortify the cuticle.
1. Pea Protein (Hydrolyzed) – Rebuilder
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What it is: A plant-derived protein with amino acids like lysine and glutamine that reinforce the hair fiber.
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Best for: Wavy and curly hair that’s heat-styled, colored, or breaking easily.
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Why: Adds strength and volume without making hair stiff. Great for hair that feels mushy or too elastic.
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Science: Studies show hydrolyzed pea protein can enhance strand durability and reduce breakage by forming a protective film and slightly penetrating the cuticle.
2. Oat Protein (Hydrolyzed) – Softener + Smoother
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Best for: Straight to wavy hair, especially if sensitive or frizz-prone.
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Why: Gently conditions, smooths the cuticle, and softens strands without weighing them down.
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Science: Rich in beta-glucans and avenanthramides, oat protein provides anti-inflammatory benefits for the scalp while helping strands retain moisture.
3. Wheat Protein / Hydrolyzed Wheat – Volume Booster
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Best for: Fine, straight, or wavy hair
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Why: Temporarily plumps strands and adds fullness while repairing surface damage.
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Pro Tip: Use before blowouts for extra bounce.
4. Rice Protein – Strength + Definition
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Best for: Curly and coily hair
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Why: Strengthens and adds curl definition without stiffness. Perfect for low-porosity curls that can’t handle heavy proteins.
5. Collagen – Elasticity Enhancer
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Best for: Aging, color-treated, or curly hair
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Why: Improves elasticity and moisture retention. Great for curls that have gone limp with age or damage.
At Luna Nectar, we use protein in our Shower Series haircare treatments as an extra treat for your hair. Our Obsidian Volumizing Anti-Pollution Scalp Scrub Shampoo is formulated with rice protein, along with the cleansing buildup magnetizer charcoal, and moisturizing and strengthening aloe, baobab and vitamin B5.
After scrubbing and rinsing out the Obsidian Scalp Scrub, be sure to balance the pH of your hair and seal the cuticle with Antarctic ACV Glass Shine Hair Rinse. The Antarctic Hair Rinse is infused with powerful pea peptide, calming chamomile, hydrating green tea hydrosol and fresh apple cider vinegar.
How Often Should You Use Protein?
It depends on your hair’s porosity, damage level, and texture:
| Hair Type | Protein Frequency |
|---|---|
| Straight, fine | Every 3–4 weeks |
| Wavy | Every 3–4 weeks |
| Curly (3a–3c) | Every 2–3 weeks |
| Coily (4a–4c) | Every 1–2 weeks (light protein) |
For low-porosity hair, go for smaller proteins like amino acids or rice protein that can actually penetrate the hair.
For high-porosity hair (bleached, colored), keratin and collagen are your friends.
Pro Tip: Pair Protein with Moisture
Protein should always be balanced with moisture.
Use a deep conditioning treatment or hydrating mask after a protein treatment to soften and rebalance your strands.
Look for moisture ingredients like:
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Aloe vera
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Glycerin
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Honey
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Panthenol
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Oils like jojoba or argan
Final Thoughts: Listen to Your Hair
Think of protein and moisture like yin and yang. You don’t need to overload your routine with either—just tune in. Rotate them strategically, based on your hair’s behavior and environment (seasonal dryness, post-color, heat styling, etc.).
Want to build a protein/moisture routine for your exact hair type and porosity? Feel free to email us for a hair routine recommendation at hello@lunanectar.com, or DM on Instagram @lunanectar