True Skin Radiant Priming Serum vs. Moisturizer: Which Do You Need?
By ILIA Beauty | Clean Makeup, Cosmetics, & Skincare | Published: 2026-07-31
Category: Comparisons
Can a priming serum replace your daily moisturizer? We compare True Skin Radiant Priming Serum with traditional moisturizers to help you decide.
When it comes to skincare, the line between moisturizers and serums can feel blurry. You might wonder if you can skip your moisturizer and just use a priming serum instead. After all, both promise hydration and a smoother complexion. But are they truly interchangeable?
In this article, we'll dive into the differences between a traditional moisturizer and the True Skin Radiant Priming Serum from ILIA. We'll look at what each product is designed to do, how they layer together, and whether you can realistically swap one for the other in your daily routine.

What Is a Priming Serum?
A priming serum is a hybrid product that sits at the intersection of skincare and makeup. It's formulated to prep your skin for foundation, concealer, or powder, while also delivering active ingredients that benefit your skin over time. Unlike a traditional primer, which often focuses purely on smoothing and blurring, a priming serum like True Skin Radiant Priming Serum is designed to hydrate, brighten, and create a radiant base.
The True Skin Radiant Priming Serum is lightweight and fast-absorbing. It contains a blend of squalane, niacinamide, and hyaluronic acid—ingredients that work to plump, hydrate, and improve skin texture. Its gel-like consistency feels refreshing and leaves a dewy, non-greasy finish that helps makeup glide on smoothly.
- Hydrates and preps skin for makeup
- Contains niacinamide for brightness and texture improvement
- Lightweight, fast-absorbing formula
What Does a Moisturizer Do?
A moisturizer is a skincare staple designed to hydrate and lock in moisture. It typically contains a higher concentration of emollients and occlusives, which create a barrier on the skin to prevent water loss. Moisturizers come in various forms—creams, lotions, gels—and are often tailored to different skin types, from oily to dry.
The primary job of a moisturizer is to keep your skin's barrier healthy and to prevent dryness. It provides longer-lasting hydration compared to most serums because of its richer texture. For many people, a moisturizer is the final step in their skincare routine, applied after serums and before sunscreen.
- Locks in moisture and strengthens the skin barrier
- Provides longer-lasting hydration
- Comes in formulas for different skin types
Key Differences: Priming Serum vs. Moisturizer
The main difference lies in their purpose and formulation. A priming serum is meant to be a multi-tasker: it hydrates, but its primary goal is to create a smooth canvas for makeup. It often contains active ingredients that target specific concerns like dullness or fine lines. A moisturizer, on the other hand, is purely about hydration and barrier support.
Priming serums tend to have a thinner, more watery consistency, which makes them absorb quickly and layer well under makeup. Moisturizers, especially creams, are thicker and may leave a film that can affect how makeup sits on the skin if not given time to absorb.
- Priming serum: lightweight, makeup-prep focused, active ingredients
- Moisturizer: richer, barrier-focused, longer-lasting hydration
Can True Skin Radiant Priming Serum Replace Your Moisturizer?
The short answer is: it depends on your skin type and routine. For those with oily or combination skin, a lightweight priming serum might provide enough hydration on its own, especially in warmer months. The True Skin Radiant Priming Serum is formulated to hydrate without feeling heavy, making it a great option for people who dislike the feel of a traditional moisturizer.
However, for those with dry or very dry skin, a moisturizer is likely still necessary. The priming serum, while hydrating, does not have the same occlusive properties as a rich moisturizer. It can't lock in moisture as effectively, so you might find your skin feeling tight or dry by midday if you skip your moisturizer entirely.
- Oily/combination skin: may be able to skip moisturizer
- Dry skin: keep your moisturizer for barrier support
- Layering both can give you the best of both worlds
How to Layer Priming Serum and Moisturizer
If you want to use both, the order matters. Apply your moisturizer first, letting it absorb for a few minutes. Then, apply the True Skin Radiant Priming Serum on top. This allows the serum to sit closest to your makeup, providing that smooth, radiant base. Alternatively, you can mix a drop of the serum into your moisturizer for an extra boost of glow.
For makeup days, you can even use the serum as a standalone primer. It works beautifully under the True Skin Serum Foundation, helping it blend seamlessly and last longer. If you're using a setting powder like the Soft Focus Setting Powder, the serum's hydrating base can help prevent a cakey finish.
- Moisturizer first, then serum, for best layering
- Mix a drop of serum into your moisturizer for added glow
- Use serum alone as a primer on makeup days
Real-World Results: What ILIA Users Say
Many ILIA users have incorporated the True Skin Radiant Priming Serum into their routines and report positive results. They notice that their makeup applies more smoothly and that their skin looks more radiant throughout the day. Some have even found that they can skip their moisturizer in the summer without experiencing dryness.
However, others with dry skin have noted that they still need their moisturizer, especially at night. The consensus seems to be that the serum is a fantastic addition to any routine, but whether it can replace your moisturizer depends on your individual skin needs and environment.
Final Verdict: Should You Make the Switch?
The True Skin Radiant Priming Serum is a versatile product that can simplify your routine and enhance your makeup application. It offers priming serum benefits like hydration, radiance, and a smooth canvas for makeup. For some, it can indeed serve as a moisturizer replacement, particularly if you have oily or combination skin and live in a humid climate.
But for others, especially those with dry skin, it's best used alongside a traditional moisturizer. Listen to your skin and adjust accordingly. If you're curious, try using the serum alone for a week and see how your skin responds. You might be pleasantly surprised.
Ultimately, the True Skin Radiant Priming Serum is a valuable addition to any skincare and makeup routine. Whether you use it as a moisturizer replacement or as a primer before makeup, it delivers visible benefits. Ready to experience the radiant difference? Explore the True Skin Radiant Priming Serum today and elevate your beauty routine.



