Hair serum from Global Swanky smooths frizz, adds shine and nourishes the scalp in a few drops: rosemary and jojoba hair oils, argan oil frizz sprays, keratin smoothing sprays, coconut moisture oils, leave-in serums, heat-protectant serums, roll-on scalp essences and curl-defining creams for every hair type. Prices start at $20.81.

On this page

1. What Does a Hair Serum Do?
2. What's in Our Hair Serum Collection?
3. Types of Hair Serums
4. Hair Serum Ingredients
5. Healthy Hair Tips
6. How to Apply Hair Serum
7. Hair Serum by Hair Type
8. Storing Hair Serums
9. Shipping, Returns and Support
10. Hair Serum FAQs
11. Find the Right Hair Serum

What Does a Hair Serum Do?

A hair serum is a lightweight liquid, oil or essence that coats the hair surface to tame frizz, add shine and make styling easier. Many serums also include scalp-care formulas that moisturize dry scalps. A few drops on damp or dry hair can make a noticeable difference to how hair looks and feels.

Smooth frizz

Serums coat the hair surface for a sleek finish.

Add shine

Light-reflecting oils make hair look glossy.

Moisturize

Oils and essences help hair feel soft and hydrated.

What's in Our Hair Serum Collection?

The range includes 336 products as of October 15, 2026.

Counts above come from product titles. For combs, clips and scrunchies, browse our hair comb and clip collection.

Types of Hair Serums

Smoothing serums

Silky formulas tame frizz and flyaways for sleek styles.

Hair oils

Rosemary, jojoba, argan and coconut oils add moisture and shine.

Scalp serums and essences

Light essences and roll-ons moisturize dry scalps.

Leave-in serums

Leave-in formulas soften and detangle between washes.

Heat-protectant serums

Applied before blow-drying or flat ironing, they help shield hair from heat styling.

Curl creams

Creams define curls and reduce frizz for natural textures.

Hair Serum Ingredients

Healthy Hair Tips

The American Academy of Dermatology notes that flakes can come from not shampooing often enough or not using the right conditioner, oil or scalp moisturizer for your hair type, and it advises protecting hair from heat.

Use a little

Start with one or two drops and add more only if needed.

Patch test

Try new products on a small area first, especially if your scalp is sensitive.

See a dermatologist

For ongoing hair thinning, shedding or scalp problems, a board-certified dermatologist can find the cause.

How to Apply Hair Serum

1. Wash and towel-dry your hair.
2. Warm one or two drops between your palms.
3. Smooth through the mid-lengths and ends.
4. Apply scalp serums directly to the scalp if the product is made for it.
5. Use heat-protectant serum before hot tools.
6. Style as usual.

Hair Serum by Hair Type

Storing Hair Serums

• Close caps tightly after use.
• Store away from heat and direct sunlight.
• Check the period-after-opening symbol.
• Keep roll-on tips clean.
• Discard products that change smell or texture.

Shipping, Returns and Support

We ship hair care to US addresses only, and standard shipping is free. Most orders arrive within 6 to 32 business days, and you can track your order once it ships.

Returns are accepted within 30 days of delivery if the item is new, unused and in its original sealed packaging, with no restocking fee. Opened hair care can't be returned for hygiene reasons. Read the full terms in our return policy, and contact our support team if your order arrives damaged.

Hair Serum FAQs

Should I use it on wet or dry hair?

Both work. Apply to towel-dried hair before blow-drying to smooth and protect, or use a drop on dry hair to tame flyaways and add shine. Check each product's directions, as scalp serums are usually applied to a clean scalp.

How much should I use?

Start with one or two drops for short or fine hair and three or four for long or thick hair. It's easy to add more but hard to remove too much, so build up slowly.

Will it make my hair greasy?

Not if you use a small amount and focus on the mid-lengths and ends, away from the roots. Fine hair does best with lightweight formulas like jojoba-based serums.

Can I use hair oil on my scalp?

Only use products labeled for scalp use on your scalp. Some heavy oils can build up at the roots, so choose light scalp essences and wash them out as directed.

Is a serum the same as a hair oil?

They're similar. Serums are often lighter and may contain silicones that coat the hair surface for smoothness, while hair oils are usually plant-based and add moisture and shine.

Can I use it before heat styling?

Yes, choose a serum labeled as a heat protectant and apply it to damp hair before blow-drying, straightening or curling. The American Academy of Dermatology recommends protecting hair from heat.

Can a serum fix thinning hair?

No, cosmetic hair serums smooth and condition hair but aren't a treatment for thinning or hair loss. If you notice ongoing shedding or thinning, see a board-certified dermatologist to find the cause.

Do I need to patch test?

Yes, especially if you have a sensitive scalp or allergies to essential oils. Apply a small amount behind your ear or on your inner arm and wait 24 to 48 hours before using it more widely.

Can men use hair serums?

Yes, hair serums work for any hair type. Men with short hair need only a drop or two to add shine and control flyaways.

Can I use a serum every day?

Most smoothing serums are fine for daily use in small amounts. If hair starts to feel heavy, use less or wash it out more often.

How long does shipping take?

Most orders arrive within 6 to 32 business days of being placed. That covers 1 to 2 business days of handling and 5 to 30 business days in transit. Standard shipping is free on every order, and we currently ship to US addresses only.

Can I return hair serum?

Unopened, sealed products can be returned within 30 days of delivery. Opened hair care can't be returned for hygiene reasons. Email support@globalswanky.com with your order number to start a return, and there's no restocking fee.

Find the Right Hair Serum

Choosing a hair serum comes down to three checks: your hair type, the finish you want, and how you style. A lightweight smoothing oil or a heat-protectant serum makes an easy start.

Ready to choose? Scroll up to the product grid, or browse our hair dryer and skin care kits collections.