Silky hair, minus the hassle
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Shipping Protection
Struggling with frizz, flyaways, and dull hair every day?
Say no more. Lero's Ultra Smoothing Hair Serum improves smoothness by 37% and gives you salon-smooth, shiny hair every time.
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"I love this hair serum. Leaves hair incredibly soft, with a beautiful shine and controls frizz without leaving a heavy or greasy feeling. It has become an indispensable step in my hair care routine after washing. A 10 out of 10!"
Ingredients
Ingredients
Cyclopentasiloxane, Dimethiconol, Dimethicone, Phenyl Trimethicone, Perfume, Butylated Hydroxytoluene, Tocopheryl Acetate, Linum Usitatissimum L. Oil & Carthamus Tinctorius Oil, Squalane.
Directions
Directions
Apply to clean, damp or dry hair using a few drops, focusing on mid-lengths and ends, or anywhere prone to frizz or flyaways. Also great for smoothing before heat styling. Use morning and/or after washing as the final step in your hair routine. No need to rinse, just work it through and style as usual. For extra frizz control, reapply a small amount throughout the day.
SMOOTHS FRIZZ & RESTORES SHINE
Why People Are Switching to
Lero's Ultra Smoothing Hair Serum
A daily hair treatment made to smooth frizz, tame flyaways, and leave hair silky and shiny from root to tip.
Discover a smoother solution to frizz and dull, damaged hair.
Humidity, heat styling, and everyday wear often lead to frizz, flyaways and dry, brittle strands, turning a simple routine into a frustrating cycle. Most serums and treatments only mask the problem temporarily, leaving behind weighed-down, greasy hair or no real change at all.
Lero's Ultra Smoothing Hair Serum targets the root cause. Formulated with QT Charge Technology, Omega 3, 6, 9, and Phytosqualane, it smooths the hair cuticle, restores shine, and improves smoothness by 37%. Ideal for daily use on all hair types, it's designed for real, lasting results, not just a quick fix.
Free Shipping & 30 Day Guarantee!
Smooth and tame frizzy, damaged hair with our daily serum.
After extensive testing and refinement, we created Lero's Ultra Smoothing Hair Serum. It combines QT Charge Technology, Omega 3, 6, 9, and Phytosqualane in an easy, lightweight applicator for daily use, all in one formula.
Many customers have found it helpful for taming frizz and restoring shine to dry, damaged hair.
- ✓ Formulated with QT Charge Technology, Omega 3, 6, 9, and Phytosqualane
- ✓ Helps smooth frizz, flyaways, and dryness
- ✓ Safe for daily use on all hair types
- ✓ No greasy residue, lightweight application
- ✓ Backed by our 30-day satisfaction guarantee
SMOOTHER HAIR, LESS HASSLE
Why People Switch to Lero
No more frustrating frizz, dry flyaways, or dullness that sticks around no matter what you try.
Avoid Frizz & Flyaways
No more unmanageable, frizzy strands. Lero helps smooth the cuticle and calm flyaways before they take over your style.
Avoid Dryness & Dullness
Most products only mask dullness for a few hours. Lero's serum works to nourish and restore shine at the source, not just cover it up.
Avoid Ongoing Damage
Frizz fades for a day, but damage can stick around for weeks. Lero is formulated to help repair and protect hair, not just treat it once.
THE FORMULA
What's Inside. Made for Daily Use.
Designed for daily use on all hair types. Formulated with QT Charge Technology, nourishing omegas, and a lightweight, easy-apply serum.
WHY IT WORKS
Built to target the whole problem, not just the frizz.
- 1 Targets frizz at the cuticle, helping smooth strands from within instead of just masking flyaways on the surface.
- 2 Restores shine and softness with nourishing omegas, so daily styling feels less like a gamble.
- 3 Formulated to help repair damaged strands left behind by heat and humidity, not just prevent new frizz.
"The frizz fades. The damage doesn't have to stick around too."
SMOOTHER HAIR, DAILY
See Lero in Action
Easy to apply, no mess, and built into your routine in seconds. Just apply after washing and let it work.
PEOPLE REPORT FEELING:
Smoother, Shinier & More Confident
- ✓ Less frizz after every wash, not more flyaways to deal with.
- ✓ No more guessing what's causing dryness, one step added to a routine you already do.
- ✓ Confidence in humid weather, no more worrying about frizz taking over.
- ✓ A formula that's actually absorbed, not just sitting on top of your hair.
5-STAR REVIEWS
See What Our Customers Are Saying
Zero Frizz, Maximum Shine
"This stuff is AMAZING. I have dry frizzy wavy hair and I used about 3 pumps in the mids to ends of my damp hair and after it dried it didn't even look or feel like my hair. There was 0 frizz and it is so shiny. One thing I will say about this product, if your hair is prone to build up, make sure you use a good clarifying shampoo every once in a while because this does have silicones (hence why it makes your hair so smooth). I really like this product so far!"
Soft & Frizz-Free Hair
"This hair serum really makes my hair very soft and freeze free. It can be applied after shampoo in wet hair. And leave it to dry naturally or use hair dryer. Value for money."
Quality That Speaks for Itself
"Very good quality products I highly recommend it since it leaves your hair soft and hydrated and its smell is incomparable. The consistency of its products and quality give a good impression and reliability the product is very good and with excellent price and quality"
Cabello Suave y Sedoso
"Super amazing the silky and shiny manageable hair this is for dry hair types recommended"
Incredibly Soft & Shiny
"I absolutely love this serum! It leaves my hair incredibly soft, smooth, and frizz-free without making it feel greasy or heavy. My hair looks healthier, shinier, and is much easier to manage after every use. A little goes a long way, and the scent is amazing. Definitely one of the best hair serums I've tried!"
Best Serum for Dry Hair
"This hair serum works best for dry and frizzy hair. Love it. Fragrance is too good and hair smell amazing for day long."
OUR STORY
Built by someone tired of dealing with frizz.
Lero started with a problem that felt way too small to complain about, but was impossible to ignore. Years of dealing with frizz and flyaways after every wash, dry brittle strands that never seemed to fully calm down, and dullness that stuck around no matter what products were tried.
Store-bought serums and treatments helped for a few hours, if that. None of them actually addressed what was causing the problem in the first place. So we set out to build something different, a formula that targets frizz at the cuticle, restores shine with real nourishing ingredients, and helps repair damage left behind, not just mask it for a day. Lero is the result of that process, made for anyone who's tired of dealing with the same cycle after every single wash.
THE DIFFERENCE
What sets Lero apart from the competition?
Discover why people choose Lero's Ultra Smoothing Hair Serum over ordinary serums and treatments.
FAQ's
How often should I use it?
How often should I use it?
Apply a small amount once or twice daily, morning and/or night, as the last step in your hair routine, after washing and towel-drying. Work it through clean, damp or dry hair from mid-lengths to ends and let it absorb; no need to rinse. You can reapply throughout the day if needed, especially before heat styling.
Does it fix existing damage?
Does it fix existing damage?
It's formulated to smooth and protect over time more than instantly repair deep, existing damage. QT Charge Technology and Omega 3, 6, 9 work to smooth the cuticle and reduce frizz, while Phytosqualane and Niacinamide nourish and restore shine. Most people see a noticeable improvement after 2-4 weeks of consistent use, and pairing it with a gentle, sulphate-free shampoo beforehand speeds up results
Is it safe for all hair types?
Is it safe for all hair types?
Yes, the formula is lightweight, non-greasy, and suitable for all hair types, including color-treated hair, which makes it gentler than many competing treatments that weigh hair down or leave residue. It's formulated with nourishing actives rather than harsh silicones. Still, since results vary by hair type, start with a small amount and increase gradually if you have fine or oily hair.
Where can I use it?
Where can I use it?
Anywhere prone to frizz or dryness, mid-lengths, ends, and flyaways around the crown. Also great for taming humidity frizz, smoothing before styling, or adding shine to dull lengths.
RISK FREE PROMISE
30 Day Money Back Guarantee
"I created Lero because getting smooth, healthy hair shouldn't have taken years of trial and error."
Try it with confidence. If you're not satisfied for any reason, contact us within 30 days of your order for a full refund. Simple and hassle free.
Guaranteed Satisfaction
Full refund within 30 days if it's not working for you.
Friendly Support
Our team is here to help before and after your purchase.
Fast Dispatch
Orders processed quickly, with tracking emailed to you.
Made to Last
Formulated with quality ingredients you can count on.