Moroccanoil Intense Smoothing Serum vs. Hair Oil: Which Should You Use?
By Moroccanoil | Global Leader in Argan Oil-Infused Beauty | Published: 2026-08-01
Category: Comparisons
Confused between Moroccanoil's Intense Smoothing Serum and the classic Treatment? We break down the differences, benefits, and best uses for each to help you choose.
When it comes to taming frizz and adding shine, Moroccanoil offers two powerhouse products: the classic Moroccanoil Treatment and the Intense Smoothing Serum. Both are infused with argan oil, but they serve different purposes. Choosing the right one can elevate your hair care routine, but the decision isn't always clear-cut.

In this comparison, we'll break down the key differences between these two popular products, their unique benefits, and how to decide which one deserves a spot in your styling arsenal. Whether you're battling humidity or seeking a sleek finish, understanding these products will help you achieve your hair goals.
Understanding the Contenders: Serum vs. Oil
Moroccanoil Treatment is a versatile argan oil-infused hair oil that has become a cult favorite. It's designed to nourish, soften, and add shine while helping to detangle and tame frizz. This lightweight oil absorbs quickly and can be used on damp or dry hair, making it a go-to for many hair types.
On the other hand, Moroccanoil Intense Smoothing Serum is a silicone-based serum that provides a stronger smoothing effect. It's specifically formulated to combat frizz and create a sleek, glass-like finish. The serum is ideal for those with thick, coarse, or unruly hair that needs extra control.
- Oil: Lightweight, versatile, nourishing, suitable for daily use.
- Serum: Heavier, more smoothing, best for high-frizz situations.
Key Differences: Texture, Application, and Results
The texture of these products is the first noticeable difference. The Treatment is a liquid oil that feels silky and non-greasy. It spreads easily and can be applied from mid-length to ends. The Intense Smoothing Serum has a thicker, more gel-like consistency that coats the hair shaft more heavily, providing a stronger barrier against humidity.
In terms of application, the oil works well as a pre-styling primer or a finishing touch. The serum is best used on damp hair before blow-drying to lock in smoothness. Both products can be applied to dry hair, but the serum is more effective for taming flyaways and static.
- For a quick touch-up on dry hair, the oil adds instant shine without weighing hair down.
- The serum is your best friend on humid days when frizz is at its worst.
Which One Should You Choose?
Your choice depends on your hair type and styling needs. If you have fine to medium hair that needs light moisture and shine, the Moroccanoil Treatment is likely your perfect match. It won't weigh hair down and can be used daily without buildup.
If you have thick, curly, or coarse hair that struggles with frizz, the Intense Smoothing Serum offers the heavy-duty control you need. It's also great for achieving a sleek, polished look for special occasions or professional settings.
For those who want the best of both worlds, consider incorporating both into your routine. Use the oil for daily nourishment and the serum when you need extra smoothing power. Many Moroccanoil fans swear by combining a few drops of oil with a small amount of serum for ultimate control and shine.
- Fine hair: Opt for the oil to avoid heaviness.
- Thick/curly hair: Choose the serum for maximum frizz control.
- Humid climates: The serum provides a stronger shield against moisture.
Complementary Products to Enhance Your Routine
To maximize the benefits of your chosen product, consider pairing it with other Moroccanoil favorites. For frizz-prone hair, the Frizz Shield Spray offers an extra layer of protection, while the Frizz Control Conditioner helps smooth the hair cuticle from the start.

If you're looking to maintain color-treated hair, the Protect & Prevent Spray is a great addition. And for a complete hair care ritual, the Repair Set includes a nourishing shampoo and conditioner that work synergistically with your styling products.
- Use a heat protectant like Protect & Prevent Spray before styling.
- Finish with a spritz of Frizz Shield Spray for all-day humidity defense.
Ultimately, both the Moroccanoil Treatment and Intense Smoothing Serum are excellent products that can transform your hair. By understanding your hair's needs and the unique benefits of each, you can make an informed choice. Whether you opt for the versatile oil or the powerful serum, your hair will thank you. Explore the full range of Moroccanoil styling products to find your perfect match.



