Hydrolyzed keratin is hair-like keratin protein broken into small peptides/amino acids so it can bind to and fill microscopic surface defects along the cuticle. The result is hair that feels stronger, smoother, and more resilient.

It forms a thin, protective film that improves wet/dry combability, reduces breakage, enhances elasticity, and boosts shine. It’s especially helpful for hair that is bleached, heat-styled, or chemically processed.

Yes—when used in moderation. It helps reduce frizz, support curl definition, and improve snap-back (elasticity). Always balance with moisture (humectants + emollients) to keep curls bouncy rather than stiff.

Keratin most closely mimics hair’s native structure, tending to feel more fortifying. Silk emphasizes slip and gloss; rice/oat offer lightweight body/softness. Many formulas blend proteins to get strength + softness + shine.

It’s rinseable and lightweight, but overuse can make hair feel rigid or squeaky (protein overload). If that happens, pause protein and use a hydrating mask for a few washes, then reintroduce keratin less often.

Start 1–2× per week in shampoo/conditioner or light daily doses in leave-ins. Increase or decrease based on feel. Fragile, highly processed hair may enjoy regular low-dose use; healthy hair may need it less frequently.

Yes. By smoothing the cuticle and improving combability, it can reduce mechanical color fade and help color look shinier and more even.

• Conditioning polymers: behentrimonium methosulfate, cetrimonium chloride, guar hydroxypropyltrimonium chloride for slip.
• Humectants: panthenol, glycerin, aloe for moisture balance.
• Light emollients: camellia/jojoba oils, CCT (caprylic/capric triglyceride) for softness and gloss.

It can temporarily bind and smooth frayed ends to reduce frizz and snapping, but it can’t permanently “glue” splits. Regular trims plus keratin-rich care minimize the look of splits between haircuts.

Usually not at low levels. Choose lightweight conditioners or leave-ins and apply from mid-lengths to ends. If hair feels coated, reduce frequency or switch to a lighter protein (e.g., rice) between keratin uses.