Argan Oil Before or After Blow-Drying?
Argan oil is one of the nicest things you can put on your hair at the end of a blow-dry, and one of the most commonly misused things before it. Much of the confusion comes from a single idea repeated across beauty sites: that oils are natural heat protectants. They are not, at least not in any way that has been tested. Here is how to use argan oil with heat styling so it helps rather than hurts.
The short answer
Use argan oil mostly after blow-drying. A drop or two on damp ends before drying is fine, but it is not a heat protectant, so pair it with a product made for heat protection. Never flat iron freshly oiled hair. Once hair is dry and styled, a single drop smooths flyaways and adds shine.
Is argan oil a heat protectant?
No. There are no published studies showing that argan oil protects hair from blow dryer, curling iron or flat iron heat, and it is not formulated or tested to heat-protection standards. That matters because heat damage is real and measurable.
In a study of repeated hair dryer use, hair dried at a distance of 5 cm reached about 95°C at the surface and showed many cracks, holes and blurred cuticle edges after 30 cycles, while hair dried from 15 cm reached about 47°C and fared much better.1 Flat irons run hotter still, with straightening temperatures in research often exceeding 200°C (392°F), and high heat can disrupt the disulfide bonds in hair keratin.2
Commercial heat protectants work largely by coating and lubricating the hair surface. A 2026 lab study notes in its background that conditioning agents such as polymers, oils, waxes and cationic molecules make hair more water-repellent and easier to comb by lubricating the surface, and that silicones are well established for smoothing and protecting the hair surface.3 Oils are part of that toolkit, which is why the idea that argan oil protects from heat sounds plausible. But plausibility is not the same as protection, and a product sold as a heat protectant has, at least in principle, been designed for that job.
Argan oil heat protection and smoke points
You will see smoke points quoted as proof that an oil can or cannot "handle" heat. Smoke points are cooking measurements, taken by heating a pan of oil under set conditions. They do not tell you how a thin film of oil on a hair fiber behaves under a moving stream of hot air or between two ceramic plates.
A more relevant point is that cosmetic argan oil is mostly unsaturated fatty acids,4 which are prone to oxidation when heated. In lab stability testing at 110°C, cosmetic argan oil made from unroasted kernels resisted oxidation for a shorter time than food-grade argan oil made from roasted kernels.4 That does not make it dangerous on your hair, but it is one more reason to keep it away from the hottest tools. (The difference between the two types is explained in culinary vs. cosmetic argan oil.)
Argan oil before or after blow-drying: the short version
| When | Use argan oil? | How |
|---|---|---|
| On damp hair before blow-drying | Optional, sparingly | 1–2 drops on mid-lengths and ends, with a heat protectant |
| Before a flat iron or curling iron | No | Use a heat protectant on dry hair instead |
| After blow-drying | Yes | 1 drop pressed over ends and flyaways |
| After flat ironing or curling | Yes, once hair has cooled | Half a drop to 1 drop on the surface |
How to use argan oil with a blow dryer
- Blot, don't rub. Wrap wet hair in a towel to absorb water rather than rubbing, which roughs up the cuticle.5
- Let hair partly air dry. The AAD suggests letting hair partially air dry before styling and blow-drying fewer times a week.6
- Apply your heat protectant. Dermatologists recommend using a heat-protecting product before styling.7 Follow the label for wet or dry application.
- Optional: one or two drops of argan oil on the ends. If your ends are very dry, smooth a small amount over them. Keep it off the roots, where it will flatten volume.
- Use low or medium heat and keep moving. Hold the dryer about 15 cm (6 inches) from your hair and keep it in motion. In the hair dryer study, that combination caused less damage than air-drying.1
- Finish with a drop of argan oil. Once hair is dry, rub one drop between your palms until it almost disappears, then press it over the ends and smooth the surface to catch flyaways.
Air-drying is not automatically gentler, by the way. In the same study, hair left to dry naturally showed damage to the cell membrane complex, the "glue" between cells inside the hair, possibly because it stayed wet and swollen for longer.1 Wet hair should also not be scorched: when hot air passes over wet hair, the cuticle scales can open wider and moisture escapes faster.2
Argan oil and flat irons
Flat irons and curling irons concentrate a lot of heat in a small area, so the rules are stricter. The American Academy of Dermatology recommends using flat irons only on dry hair, on a low or medium setting, no more often than every other day, and leaving a curling iron in place for only a second or two.6
Avoid putting argan oil on hair right before you iron it. Pressing oiled hair between hot plates heats that oil directly against the fiber, is likely to leave hair looking greasy, and the oil does nothing proven to reduce the heat that reaches the hair. Use your heat protectant instead, let hair cool after styling, and then smooth on a tiny amount of argan oil for shine.
A good finishing oil should add shine without silicone buildup or fragrance. Our organic argan oil is pure cold-pressed argan kernel oil, unroasted and with nothing added, and one drop is usually enough to finish a blow-dry on shoulder-length hair.
Why finishing with argan oil works
After styling, hair is at its driest. Applying oil at that moment lays down a thin film along the surface. Lab research shows that oil films slow the rate at which hair absorbs moisture from the air, which is what makes a sleek blow-dry puff up on a humid day.8 The film also adds slip and reflects light, so hair looks glossier and feels softer.
Mistakes that undo a good blow-dry
- Too much oil. Freshly blow-dried hair shows grease quickly. Start with one drop and add more only to the ends.
- Treating oil as protection. It is a finisher. Your protection comes from lower heat, distance, movement and a dedicated heat protectant.
- Maximum heat every day. The AAD recommends the lowest heat setting that works and limiting how often you use hot tools.5
- Ironing damp hair. Flat irons are for dry hair only.6
If your hair is already showing heat damage, our guide to argan oil for dry, damaged and frizzy hair covers a repair-focused routine, and using argan oil on colored and styled hair covers chemically treated hair. For curls you diffuse rather than straighten, see our curly hair routine.
Frequently asked questions
Is argan oil a heat protectant?
No. Argan oil has not been tested or formulated as a heat protectant, and there is no published evidence that it shields hair from blow dryer or flat iron heat. Use a dedicated heat protection product and treat argan oil as a finisher.
Can I use argan oil before a flat iron?
It is better not to apply oil right before a flat iron. Plates often run above 200°C (392°F), and pressing oil-coated hair between them can leave hair greasy and stress it. Flat iron dry hair with a heat protectant, then add a drop of oil afterward.
Should I put argan oil on wet or dry hair before blow-drying?
A drop or two on damp, towel-blotted ends before blow-drying is fine, alongside a heat protectant. Most of the visible smoothing and shine, though, comes from a small amount applied after your hair is dry.
Does the smoke point of argan oil matter for hair?
Not much. Smoke points are cooking measurements made under specific lab conditions, not a rating of how well an oil protects hair. What matters for hair is keeping heat low, limiting contact time and using a product designed to protect against heat.
Sources
- Lee Y, Kim YD, Hyun HJ, Pi LQ, Jin X, Lee WS. Hair shaft damage from heat and drying time of hair dryer. Ann Dermatol. 2011;23(4):455–462. Link
- Zi Y, Liu J, Fang S, Li M, Huang Q, Peng X. Establishment of heat-damaged model for hair. J Cosmet Dermatol. 2025;24(8):e70360. Link
- Li C, Li J, Chang K, Wang J. Prevention of hair heat damage via thermoresponsive organic silicon-modified keratin. Molecules. 2026;31(3):521. Link
- Gharby S, Charrouf Z. Argan oil: chemical composition, extraction process, and quality control. Front Nutr. 2021;8:804587. Link
- American Academy of Dermatology. 10 hair care habits that can damage your hair. Link
- American Academy of Dermatology. Hair styling without damage. Link
- American Academy of Dermatology. Black hair: tips for everyday care. Link
- Keis K, Huemmer CL, Kamath YK. Effect of oil films on moisture vapor absorption on human hair. J Cosmet Sci. 2007;58(2):135–145. Link
