Face Oil vs Serum: What’s the Difference and Which Do You Need?

Category: Comparisons

Face oils and serums both nourish skin, but they work differently. Learn the key differences, how to choose, and how to layer them for best results.

Quick Answer

Serums are water-based treatments that deliver concentrated active ingredients deep into the skin, while face oils are lipid-based and work mainly on the skin’s surface to seal in moisture and reinforce the barrier. If you want targeted treatment, choose a serum; if your skin feels tight or dry, a face oil may be the better pick—and many people benefit from using both.

If you’ve ever stood in front of your bathroom shelf wondering whether to reach for a serum or a face oil, you’re not alone. Both are staples in botanical skincare, but they do very different jobs. Understanding the difference between face oil and serum can help you build a routine that actually works for your skin—without guesswork.

In simple terms, serums are lightweight, water-based formulas packed with active ingredients that penetrate quickly. Face oils, on the other hand, are richer and work to lock in moisture and support the skin barrier. They’re not interchangeable—they’re complementary.

What Is a Face Serum?

A face serum is a concentrated treatment with a watery or gel-like texture. Because its molecules are small, a serum can deliver active ingredients—like vitamins, antioxidants, and botanical extracts—deeper into the skin. Serums are typically applied after cleansing and before moisturizer or oil.

Natural serums often include plant-based actives such as yarrow, plum, or rose, which can help brighten, balance, or regenerate the skin. They’re ideal for targeting specific concerns like dullness, uneven texture, or fine lines.

Use a serum when you want to treat a specific skin concern, not just add moisture.

What Is a Face Oil?

Face oils are made from lipid-rich plant oils that sit on the skin’s surface to nourish, soften, and seal in hydration. They help strengthen the skin barrier and prevent moisture loss, which is especially beneficial for dry or dehydrated skin. Oils can also be used on hair, hands, and body, making them a versatile addition to your routine.

Organic face oils often contain fatty acids and antioxidants that support a healthy glow. However, because they are heavier, they may not be ideal for very oily or acne-prone skin unless the formula is specifically designed for that skin type.

Apply face oil as the last step of your routine to lock in everything underneath.

Can You Use Both? How to Layer

Yes, you can—and many people do. The general rule is to apply water-based products first, then oil-based ones. So, cleanse, apply your serum, wait a minute for it to absorb, then follow with a face oil to seal in the benefits.

If you have combination skin, you might use a serum all over and apply oil only to drier areas like the cheeks. If your skin is very oily, you may prefer a lightweight serum and skip the oil, or use a non-comedogenic oil sparingly.

Layer serum before oil for maximum absorption and hydration.

The Trade-Offs at a Glance

Serum for targeted treatment: Serums deliver concentrated actives deep into the skin, making them ideal for addressing specific concerns like dullness or uneven texture. They are lightweight and absorb quickly. Choose a serum when you want visible results for a particular issue.
Face oil for barrier support: Oils seal in moisture and strengthen the skin barrier, which is key for dry or dehydrated skin. They also provide a natural glow and can be used on hair and body. Choose an oil when your skin feels tight, flaky, or needs extra nourishment.
Layering for best results: Using both allows you to treat and protect: serum first, then oil. This combo works well for normal to dry skin or during colder months. If you’re not sure, start with a serum and add an oil only where needed.

Botanical Options to Consider

Plum Beauty Oil: The original multi-sensory indulgence for face, hands, hair, and body, our Plum Beauty Oil helps brighten, balance, and restore skin while locking in moisture for a soft, youthful glow. Handcrafted from a proprietary blend of sustainably sourced plum varietals, this indulgent oil is an excellent source of nourishing vitamins and anti-oxidants. Powerful polyphenols and omega fatty acids 6 & 9 help protect the skin. This oil is a versatile option if you want a single product that can hydrate your face, body, and hair. Its fatty acid content supports the skin barrier and helps prevent moisture loss.
holi (crème) filter face crème: This super-luxurious moisturizing product has been created to instantly breathe life into any type of skin, even the most sensitive or acne-prone. Applied morning, day or night, holi (crème) is packed full of natural nutrients and powerful active ingredients that soothe, nourish and prime skin as well as delivering ultimate hydration and helping with the appearance of skin texture. Formulated without petroleum. If you have sensitive or acne-prone skin, this cream offers a moisturizing option that works like a treatment, helping to smooth texture without clogging pores. It can be used as a final step instead of a traditional oil.

Which Should You Choose?

Best for

Those with dry or dehydrated skin who need extra nourishment and barrier support—a face oil like Plum Beauty Oil is a great choice.
Anyone who wants a versatile product that can also condition hair, hands, and body—face oils multitask well.

Not for

If you are prone to breakouts and prefer a lightweight, non-greasy feel, a heavy oil may not be ideal—consider a serum or a non-comedogenic formula instead.
If you are looking for a quick-absorbing treatment to target fine lines or dullness, a serum is more effective than an oil alone.

The choice between a face oil and a serum doesn’t have to be either/or. Start with a serum to address your skin’s specific needs, then layer an oil to lock in moisture and keep your barrier strong. Listen to your skin—it will tell you what it needs.