Argan oil is best for smoothing frizz, adding shine, and protecting hair from daily wear. It coats the hair surface with a lightweight film that tames flyaways and gives strands a polished, non-greasy finish. What it doesn’t do, despite widespread marketing claims, is stimulate hair growth. A systematic review of the available clinical literature found no significant evidence that argan oil improves hair growth, hair quality, or scalp conditions. That doesn’t make it useless. It makes it a good finishing product with realistic limits.
How Argan Oil Works on Hair
Argan oil is roughly 47% oleic acid and 33% linoleic acid, both relatively large fatty acid molecules. Because of their size, they don’t easily slip past the hair’s outer protective layer the way smaller molecules in coconut oil can. Instead, argan oil sits primarily between the cuticle layers and the outermost zones of the hair’s inner structure. Research published in the journal Cosmetics confirmed that while argan oil does diffuse into the hair to some degree, it stays closer to the surface compared to coconut or avocado oil.
This surface-level action is actually what makes argan oil useful as a styling and finishing product. It creates a thin coating on each strand that smooths the cuticle, reduces friction between hairs, and reflects light for visible shine. If you’ve ever used it and noticed your hair looked glossier but didn’t feel deeply conditioned, that’s exactly why.
What It Actually Does Well
Argan oil excels at three things: frizz control, shine, and moisture sealing. After you wash and condition your hair, applying a small amount helps lock in the hydration your other products provided. Think of it less as a moisturizer and more as a sealant that prevents water from escaping the strand into dry air. This makes it particularly useful in low-humidity environments or during winter when hair tends to look dull and static-prone.
It also works as a light heat buffer. The oil’s composition, rich in antioxidants including vitamin E (tocopherols), offers some protection against sun damage. For thermal styling, it provides a thin layer of lubrication that can reduce surface friction from flat irons or blow dryers, though it shouldn’t replace a dedicated heat protectant spray if you style at high temperatures regularly.
The Hair Growth Question
This is where the gap between marketing and evidence is widest. A 2022 systematic review published in the International Journal of Dermatology examined all available studies on argan oil’s effects on hair. The conclusion was blunt: argan oil does not have any significant evidence supporting its use for hair growth, improved hair quality, or treatment of scalp infestations. Coconut oil, by comparison, had at least some clinical support for treating brittle hair.
If you’re dealing with thinning hair or hair loss, argan oil isn’t the product to rely on. It may make existing hair look healthier on the surface, but it won’t change what’s happening at the follicle level.
Argan Oil vs. Coconut Oil
These two oils get compared constantly, but they work in fundamentally different ways. Coconut oil is built from smaller fatty acids (primarily lauric acid) that can penetrate deep into the hair shaft. This makes it a genuine deep conditioner that reduces protein loss during washing. It’s the better choice for pre-shampoo treatments and for hair that’s seriously dry or damaged from the inside out.
Argan oil works on the surface. It’s lighter, less greasy, and better suited as a leave-in finishing product you apply to styled hair. Where coconut oil can leave fine hair feeling heavy or weighed down, argan oil gives a more weightless result. The simplest way to think about it: coconut oil for repair days, argan oil for styling days.
How Hair Type Affects Results
Because argan oil coats rather than penetrates, it behaves differently depending on your hair’s porosity. Low-porosity hair (strands with a tightly sealed cuticle that resist absorbing moisture) can build up product on the surface quickly. Using argan oil too frequently on low-porosity hair, especially alongside protein-containing products, can leave hair feeling stiff, brittle, and dull rather than soft. If your hair takes a long time to get wet in the shower, that’s a sign of low porosity, and you’ll want to use argan oil sparingly.
High-porosity hair (common after chemical treatments, heat damage, or coloring) has a more open cuticle structure that loses moisture easily. Argan oil can help here by sealing those raised cuticle edges and slowing moisture loss. Thick, coarse, or curly hair types generally tolerate argan oil well because these textures benefit from the extra surface lubrication without getting weighed down.
How to Apply It
One to two pumps (or three to four drops) is enough for most hair lengths. Warm it between your palms first, then distribute it through mid-lengths and ends on dry or damp hair. Avoid applying directly to your roots unless your scalp is particularly dry, as the oil can make fine hair look flat and greasy at the crown. You can use it daily as a finishing touch after styling or a few times per week as a light leave-in treatment.
For a deeper treatment, apply a more generous amount to dry hair before bed, focusing on ends, and wash it out the next morning. This gives the oil more time to coat and smooth the cuticle layer, which can be helpful if your ends are rough or split-prone.
One Caution Worth Knowing
The penetration research revealed a counterintuitive finding: because argan oil is highly unsaturated, it actually increases the hair’s affinity for water rather than repelling it. In already-damaged hair, this can make strands swell more when wet, which over time may weaken them and make them more susceptible to breakage. If your hair is severely compromised from bleaching or repeated chemical processing, coconut oil or avocado oil may be better options for conditioning, since both create a more water-resistant barrier inside the shaft.
Choosing a Quality Product
Pure, cosmetic-grade argan oil is made from unroasted kernels and has a very faint scent, nearly odorless compared to the culinary version (which smells distinctly nutty). The color should be light gold to clear. If a product labeled as argan oil has a strong fragrance or deep amber color, it’s either the food-grade roasted version or it contains added fragrances.
Look for “Argania spinosa kernel oil” as the first or only ingredient on the label. Products that list it further down the ingredients contain only a small percentage, diluted in silicones or other carrier oils. These blends aren’t necessarily bad, but they deliver different results than pure oil. Authentic argan oil carries a Protected Geographical Indication (PGI) label when sourced from southwestern Morocco, where the argan tree grows natively.
Allergic reactions are rare but documented. At least one clinical case of allergic contact dermatitis from argan oil applied to the scalp has been reported in the medical literature. If you notice redness, itching, or irritation after use, discontinue and patch-test on a small area of skin before trying again.