Natural sant Onion Keratin DuoBox — 2‑Step Anti‑Frizz Shampoo + Keratin Treatment, Formaldehyde‑Free

Natural Sant Onion Keratin DuoBox is a two-step shampoo and keratin smoothing treatment set that softens hair, reduces frizz, and creates a glossy, manageable finish without formaldehyde, parabens, or added salt.

This kit pairs a clarifying, onion‑infused shampoo with a keratin smoothing treatment designed for at‑home use. Together they cleanse, fortify, and temporarily smooth the hair shaft so styling is easier and results look polished. The formula blends onion extract with botanical allies—rosemary and biotin—plus keratin to address dryness and rough texture while avoiding harsh additives.

How does the DuoBox reduce frizz and improve smoothness?

The treatment combines keratin to coat and reinforce hair fibers with onion extract and conditioning botanicals that help tame flyaways. Used after cleansing, the keratin forms a smoothing layer that makes strands lie flatter and reflect light, producing a silkier appearance. Results depend on hair type and following the application and heat‑sealing steps.

• Keratin treatment applied on towel‑dried hair, left 10–15 minutes, then rinsed.
• Blow‑dry and flat‑iron to seal the smoothing layer into the shaft.
• Shampoo removes buildup and prepares hair for even treatment spread.

What ingredients nourish and protect hair in this set?

The formula centers on onion extract, supported by rosemary and biotin to condition and help improve manageability. Keratin provides a protein coating that smooths and helps reduce breakage from daily styling. The product is formulated without formaldehyde, parabens, or added salt for a gentler finishing treatment.

• Onion extract for conditioning and scalp-supportive nutrients.
• Keratin protein for surface smoothing and enhanced shine.
• Rosemary and biotin to help strengthen and soften strands.
• No formaldehyde, parabens, or added salt.

How do I use the shampoo and keratin treatment for best results?

Start with a thorough wash using the included shampoo to eliminate oils and styling residues so the treatment can adhere evenly. Apply a thin, even layer of the keratin treatment to towel‑dried hair, wait 10–15 minutes, then rinse until water runs clear. Finish by blow‑drying and flat‑ironing to lock in the smoothing layer.

• Use shampoo first to cleanse; towel‑dry before treatment.
• Spread treatment thinly and evenly from roots to ends.
• Rinse fully after 10–15 minutes, then blow‑dry and flat‑iron to seal.

How long do smoothing effects typically last and what maintenance is needed?

Duration varies by hair porosity and styling routine; many users notice improved smoothness for several weeks with proper aftercare. Avoid heavy salt or clarifying products that strip the keratin layer; use gentle, sulfate‑free shampoos and limit frequent high‑heat styling to prolong results. Periodic touch‑up treatments can refresh the smoothing effect as it gradually fades.

• Expect several weeks of smoother, shinier hair depending on care.
• Use gentle shampoos and avoid harsh clarifiers to extend effects.
• Repeat treatment when smoothing diminishes or as needed.

Who is this for: Natural Sant Onion Keratin DuoBox suits people with frizz‑prone, dry, or chemically treated hair who want a salon‑style smoothing result at home without formaldehyde or parabens. It’s designed for users willing to follow the two‑step process—cleanse, treat, rinse, then heat‑seal—to gain straighter, shinier hair that’s easier to style. If you prefer low‑maintenance daily care or have very fine hair, adjust the amount and frequency to avoid weighing hair down.

Ingredients

Onion