Nexxus Ultralight Smooth Frizz Defy Cream Serum for Frizzy Hair

In this review of the Nexxus Ultralight Smooth Frizz Defy Cream Serum, the bottom line is simple: it is for people with dry, frizzy or flyaway-prone hair who want a lightweight, long-lasting smoothing treatment without heavy buildup. The reviewer found the serum most useful when used as part of the Ultralight Smooth System, where it forms an invisible shield around strands to weightlessly resist humidity and tame frizz. For those seeking instant smoothing, heat protection and a pleasant scent, this product delivers visible results while keeping hair feeling soft rather than stiff.

Key Features

• Frizz protection: When used with the Ultralight Smooth System the serum weightlessly blocks out frizz in up to 98% humidity, helping hair stay controlled in damp conditions.
• Protein-infused formula: Almond Protein and Jasmine Flower work in the formula to smooth flyaways and add conditioning benefits without weighing hair down.
• Long-lasting smoothness: The cream serum claims to keep hair smooth for up to 72 hours, extending the styling window between washes.
• Heat and humidity defense: It provides a protective layer that helps shield hair from heat styling and atmospheric moisture.
• Lightweight finish: The ultralight design aims to deliver shine and manageability without leaving heavy residue on strands.
• System synergy: Designed to work with a sulfate and silicone free shampoo and moisturizing conditioner for more consistent frizz control.

Who It's For

The Nexxus Ultralight Serum suits people with dry, frizzy or humidity-sensitive hair who want a lightweight styling treatment that smooths and tames flyaways. It is a good pick for those who already follow a multi-step hair care routine or who are willing to try the Ultralight Smooth System for best results.

Those with very fine hair who avoid any product buildup should test a small amount first, and people who prefer exclusively oil-free or clinical anti-frizz treatments may prefer other formulations. It may not be the ideal choice for users seeking a completely matte finish or those who dislike any cream-serum texture.

Pros & Cons

Pros

• Delivers noticeable smoothing and tame flyaways shortly after application.
• The formula provides heat protection while helping hair feel soft and conditioned.
• Works best in combination with the Ultralight Smooth System for higher humidity resistance.
• Pleasant scent and lightweight shine that many customers praise.

Cons

• A few users report differing opinions on greasiness, so technique and amount used matter.
• Optimal claims such as 72-hour smoothness are most consistent when used with the full system.

Specifications

Product type	Cream serum for frizzy hair
Volume	4 fl oz
Key ingredients	Almond Protein and Jasmine Flower
Main benefits	Frizz control, heat protection, smoothing
System compatibility	Ultralight Smooth System (shampoo, conditioner, serum)
Humidity resistance	Blocks frizz in up to 98% humidity when used with system
Manufacturer	Unilever

Our Verdict

The Nexxus Ultralight Smooth Frizz Defy Cream Serum is a solid choice for anyone wanting a lightweight, conditioning serum that smooths frizz and protects from humidity and heat. It offers good value for those who will use it with the Ultralight Smooth System, delivering soft, manageable hair and noticeable reduction in flyaways without heavy buildup.

Frequently Asked Questions

Will this make my hair greasy?
When used sparingly and distributed through mid-lengths and ends, most users find it leaves hair soft rather than greasy; some report greasiness if too much is applied.

Can it be used with heat styling?
Yes, the formula provides heat protection and is intended to be compatible with blow drying and other heat styling when used as directed.

Do I need the full Ultralight Smooth System?
The serum performs alone, but best humidity resistance and the claimed 72-hour smoothness are achieved when paired with the Ultralight Smooth Shampoo and Conditioner.