5 of the Best Ingredients for Smooth Hair to Use in 2026

From nourishing oils like Squalane and Jojoba Oil to fatty acid-rich Omega-9, the best ingredients for smooth hair help to seal, soften and add slip to frizz-prone strands for a silkier look.

But what makes a smoothing ingredient effective – and which formulas are best suited to your hair type? Here's everything you need to know about the hard-working ingredients that tame unruly hair...

What Makes an Ingredient Effective for Smoothing Hair?

Different types of frizz call for different ingredients. If you have fine, fluffy lengths, look for lightweight sealants that smooth the hair fiber without weighing it down, while those with coarser, drier lengths should try out richer oils that provide slip and softness. Meanwhile, hair that puffs up in the face of humidity needs conditioning emollients that help manage moisture, while strands prone to frizz-inducing breakage can benefit from protective polymers.

5 Key Ingredients for Smoother Hair

From lightweight oils and moisture-binding humectants to protective polymers, the right smoothing ingredients can help tackle different types of frizz. Here are five key ingredients to look for when you want silky hair...

Squalane

What it is: Squalane is a lightweight, oil-like emollient derived from sugar cane, highly lauded for its nourishing properties.

Find it in: the complete ULTIMATE SMOOTH regimen, from Shampoo to Miracle Oil Serum. Squalane is part of Wella’s patented technology, which helps to recreate your hair's protective barrier for a silkier look and feel.

Omega-9

What it is: Omega-9 is a bioidentical lipid that can help to fill gaps in the hair cuticle, making strands more resistant to frizz, roughness and humidity.

Find it in: the ULTIMATE SMOOTH regimen, where it teams up with Squalane to give you 96-hour frizz control*. It's also a key ingredient in the ULTIMATE REPAIR ritual – ideal for frizzy, damaged hair types in need of intense repair.

Jojoba Oil

What it is: Jojoba Oil is a light yet moisturizing oil that's popular in hair care and skincare. Curly hair types often love it for its weightless nourishment – ideal for defining ringlets without weighing them down.

Find it in: NutriCurls’ Nourish-In Complex, a beautifully hydrating blend that runs through the whole regimen – from the delicate Micellar Shampoo for Curls to the shape-enhancing Curlixir Balm.

Panthenol

What it is: Panthenol is derived from Pantothenic Acid, also known as Vitamin B5. As well as being a humectant – meaning it can bind water to dry, frizzy hair – it also improves shine and softness.

Find it in: The NutriCurls collection. Alongside Jojoba Oil, it's part of the regimen's Nourish-In Complex, giving wavy and curly hair types a touch of shine and frizz-defying nourishment.

Protective Polymers

What it is: Protective polymers are specially formulated to create a film over your hair, working like an invisible shield to protect against a range of stressors. When smooth, silky hair is your goal, look for polymers that act like a barrier against friction, one of the key causes behind rough, unruly hair.

Find it in: ULTIMATE REPAIR Night Serum, a bedtime treatment that combines protective polymers with AHA and Omega-9 to shield your hair against the frizz-inducing, breakage-causing effects of pillow friction.

How to Layer Your Smoothing Ingredients

Add one smoothing formula to your hair care regimen, and you'll start to see results. But make smoothing part of every step, and you'll enjoy your silkiest hair yet. It's a no-brainer.

Layering your smoothing ingredients and products is key if you want to lock out frizz from one wash to the next, so here's your ideal order for application – from pre-shampoo oil to on-the-go styler...

Step 1: Protect Lengths with a Pre-Shampoo Oil

Try: ULTIMATE SMOOTH Miracle Oil Serum, a multi-tasking elixir you're going to see more than once in this regimen. As a first step, it shields your lengths while you're washing your hair – ideal for protecting against dryness.

How to use it: On wash day, apply ULTIMATE SMOOTH Miracle Oil Serum to the mid-lengths and ends of dry hair (not the roots), let it sit for a few minutes, then jump in the shower to begin shampooing.

Step 2: Gently Massage in a Smoothing Shampoo

Try: ULTIMATE SMOOTH Shampoo for a combination of mild surfactants, Squalane and Omega-9. The gentle cleanser is your first step to smoother, silkier hair.

How to use it: Scrubbing at hair can leave it rough and unruly – yep, even in the washing phase – so be gentle when massaging shampoo into wet hair. Focus on the roots, then let the lather run through lengths as you rinse.

Step 3: Apply a Nourishing Conditioner or Hair Mask

Try: ULTIMATE SMOOTH Conditioner for 'everyday' nourishing and ULTIMATE SMOOTH Hair Mask as a weekly deep conditioning treatment. Both are packed with the signature Squalane and Omega-9 blend, with the hair mask delivering a higher concentration of the smoothing ingredients.

How to use it: Squeeze out excess water, then focus your chosen treatment through the mid-lengths and ends of your hair. Leave the conditioner on for 30 seconds to three minutes and the hair mask on for up to five minutes. Rinse thoroughly with lukewarm water.

Step 4: Protect and Perfect with a Smoothing Hair Oil

Try: ULTIMATE SMOOTH Miracle Oil Serum. Oils help to seal fluffy lengths, and this one is especially potent, thanks to its innovative Squalane and Omega-9 blend, plus its built-in heat and UV protection. The double act of smoothing ingredients works to nourish frizz-prone hair from the inside out, while veiling strands in silky shine. The result? 96 hours of frizz control*.

How to use it: Apply 2-3 pumps of the oil to the mid-lengths and ends of dry hair. It can also be used on dry hair before using hot tools, or as a finisher to lock in a glossy shine.

Step 5: Enhance Waves, Curls or Coils with a Defining Balm

Try: NutriCurls Curlixir Balm. Packed with the Nourish-In Complex (featuring Jojoba Oil and Panthenol), it adds moisture, definition and soft, bounce-enhancing hold in a single step.

How to use it: While hair is damp, layer NutriCurls Curlixir Balm over the top of ULTIMATE SMOOTH Miracle Oil Serum. Gently work it through waves, curls and coils with a finger-coiling, praying-hands or scrunching method, then dry with a diffuser or let hair air-dry.

Step 6: Control Frizz in Between Wash Days

Try: ULTIMATE SMOOTH 24/7 Silky Milk, a lightweight milk for on-the-go frizz control, giving you instant shine, smoothness and humidity protection that's suitable for even fine hair types.

How to use it: Whenever hair needs smoothing, apply a small amount to the lengths and ends of dry hair. On day two or day four hair, it sinks in fast for lightweight taming.

Wella Pros' Favourite Smoothing Products

Take it from the pros – the right smoothing ingredients and products can make all the difference to your finished look. So, we asked some of our Wella Professionals Ambassadors and Top Artists to share their go-to formulas. Here are their picks...

James Earnshaw (@jhair_stylist), Wella Professionals Global Ambassador:

"Miracle Oil Serum creates the most beautiful glass hair finish you've ever seen!"

Briana Cisneros (@brianacisneros), Wella Professionals Global Ambassador:

"ULTIMATE SMOOTH Silky Milk is brilliant for creating softness and shine that reflects while giving gentle styling benefits. I love using it the day after to bring life and elasticity back to the hair to create natural movement and a healthy look."

Nicole Revish (@nicolerevish), Wella Professionals Top Artist:

"NutriCurls is a curl's best friend! Tons of nourishment and definition with the perfect hold."

Ingredients for Smooth Hair: FAQs

What Ingredients Make Hair Smooth and Silky?

To smooth hair, look for nourishing, sealing oils like Squalane or Jojoba Oil, as well as fatty acids such as Omega-9. Humectants like Panthenol can also help frizz-prone hair – especially curls – as they attract and retain moisture, keeping strands soft and manageable.

What Do Professional Stylists Use to Make Hair Soft and Silky?

Every stylist has their own go-to smoothing product. For Wella Professionals Global Ambassador James Earnshaw, it's ULTIMATE SMOOTH Miracle Oil Serum, which "creates the most beautiful glass hair finish you've ever seen!"

What is the Difference Between Silicones and Natural Oils for Smooth Hair?

Silicones coat the hair to create a smooth, slip-enhancing layer that can help to reduce frizz and make hair feel softer. Meanwhile, natural oils like Squalane don't just make your hair feel smoother; they help to condition and care for strands, all while improving softness.

What Ingredients Should I Look for in a Leave-In Conditioner or Heat Protectant?

Don't just look at individual ingredients; consider the whole formulation. On the smoothing side, you want nourishing, sealing oils like ULTIMATE SMOOTH's Squalane and Omega-9 blend, while on the protection side, you want a combination of both heat and UV protection.

Explore Wella Professionals' Smoothing Solutions

Now you've got the full lowdown on the smoothing ingredients that really work, discover the nourishing products that make them part of your routine.

* When using ULTIMATE SMOOTH Miracle Oil Serum.