Hair porosity protein treatment frequency and type depend entirely on your hair's porosity level. Low porosity hair is protein-sensitive and can easily become overloaded. High porosity hair is protein-hungry and needs regular treatment. This guide covers the float test, protein types, and exact frequency recommendations for each porosity level.
Protein Treatment Guide by Porosity
How to Do the Float Test at Home
- 1Wash your hair with clarifying shampoo to remove all product buildup. Let it air dry completely.
- 2Fill a glass with room-temperature water. Pull a single clean hair from your brush.
- 3Place the hair on the water surface and wait 2-4 minutes.
- 4
Read your result:
- Still floating after 4 minutes = Low Porosity
- Sinks slowly to middle = Normal Porosity
- Sinks quickly to bottom = High Porosity
How to Choose Protein Treatments for Your Hair Porosity
Protein treatments strengthen the hair shaft by temporarily filling gaps in the cuticle structure. But not all hair needs the same amount of protein — or the same type. Using a heavy protein treatment on low porosity hair can cause protein overload, making hair feel dry and brittle. The key is matching treatment frequency and protein weight to your porosity level.
Low Porosity Hair and Protein
Low porosity hair has tightly closed cuticles that resist both moisture and protein uptake. Only small-molecule proteins (hydrolyzed wheat protein, hydrolyzed silk) can penetrate effectively — larger proteins like keratin sit on the surface and build up, causing stiffness. If your hair has been protein-overloaded, stop all protein products immediately and do several moisture-only deep conditioning sessions.
Normal Porosity Hair and Protein
Normal porosity hair has a balanced cuticle that absorbs and retains both moisture and protein well. A monthly protein treatment keeps the structure strong without risk of overload. Any protein type works — small molecules for maintenance, larger proteins like casein or keratin for occasional strengthening after heat or color damage.
High Porosity Hair and Protein
High porosity hair has gaps in the cuticle (from chemical processing, heat damage, or genetics) and craves protein to fill those spaces. Weekly light protein treatments or bi-weekly heavy treatments are typically needed. Focus on hydrolyzed proteins (wheat, quinoa, keratin) that can penetrate deeply. Always follow protein with a moisturizing deep conditioner to maintain the protein-moisture balance.
Frequently Asked Questions
Is this protein guide free?
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How do I test my hair porosity at home?
The float test: wash your hair with clarifying shampoo to remove products. Once dry, drop a clean strand into a glass of room-temperature water. If it floats on top for 2+ minutes, you have low porosity. If it sinks slowly to the middle, you have normal porosity. If it sinks quickly to the bottom, you have high porosity.
Does low porosity hair need protein treatments?
Low porosity hair is typically protein-sensitive. Excess protein can make low porosity hair feel stiff, dry, and brittle — a condition called protein overload. Use light protein treatments sparingly (once a month maximum) and only when hair feels weak or after chemical processing. Deep conditioning without protein is usually the better approach.
How often should high porosity hair get protein treatments?
High porosity hair is protein-hungry because the cuticle is open and porous, lacking the structure to retain moisture. Weekly light protein treatments or bi-weekly heavy protein treatments help strengthen the hair shaft. Look for hydrolyzed proteins that can penetrate the cuticle rather than just coat it.
What is the difference between hydrolyzed protein and silk protein?
Hydrolyzed proteins (wheat, keratin, silk) are broken into small molecules that can penetrate the hair shaft for deep strengthening. Larger proteins like silk protein and keratin coat the outside of the hair to smooth the cuticle and add shine. High porosity hair benefits from both. Low porosity hair should stick to very small protein molecules to avoid buildup.
What does protein overload feel like?
Protein overload makes hair feel hard, stiff, dry, rough, and brittle. Hair may snap easily under tension and feel like straw. This is most common in low porosity hair after too many protein treatments. To recover, stop all protein treatments and do several deep conditioning sessions with humectants and emollients — no protein.