Small quantity but only a few drops are needed for the whole hair. However, personally I did not like it. I have curly hair with thick strands and as soon as I applied it, the hair became stiff and unruly. I had to wash it afterwards to make my hair sit. Waste of money for me! I use one from the supermarket, known to be a thousand times better!!

Wonderful! It doesn't make the hair oily, gives shine, protects from heat and frizz! It also smells amazing! I would buy it again.

I use it every morning on the ends of my hair. My hair no longer splits and additionally, the ends lengthen without breaking. I have very fine hair and my hair only reached my shoulders with difficulty. They could never reach below because the ends would dissolve. Since I started using it, they have reached the lock and I hope they will lengthen even more!

Ultra lightweight in feel and scent. I have a lot of hair with dry, fine, and damaged strands, oily roots, and I apply a considerable amount (3-4 drops in 2-3 doses every day, often 2-3 times a day), but my hair never gets greasy. On the contrary, it looks shiny. On its own, it doesn't provide enough hydration and nourishment if the hair is damaged, but it definitely needs a leave-in conditioner to trap moisture. However, it helps a lot with split ends and hair length.

Okay, small but miraculous!
Not greasy at all. Smells like a hair salon!!!! And on frizzy and slightly damaged hair, you apply it and it's like they find their lost shine

I have been using it for a while daily on dry hair and after styling to remove the cast from the gel. It leaves a nice feeling, doesn't weigh down the hair, doesn't make it oily, leaves it soft. Overall positive experience

It is a lightweight hair oil and the packaging lasts a long time (I use 5-6 drops for hair up to the chest). It makes the hair slightly shinier but does not improve the texture. After two months of use, I can say that I saw a slight improvement in the quality of the ends (they don't easily split) so I consider it does what it promises. Unfortunately, it loses stars because it doesn't have immediate results and doesn't improve the appearance, due to the price in relation to the quantity, but also because I compare it to no.3 and had higher expectations.

Apart from the nice packaging, it is definitely a lightweight hair oil. It absorbs easily and definitely does not leave any greasiness. It doesn't require a lot of quantity (I use 10 drops and I have long, non-greasy hair that easily frizzes). Its scent is almost nonexistent. Very subtle.
But I can't say that I saw a tremendous difference compared to other hair oils. I will of course finish the bottle, it's not bad, but afterwards I will probably look for another brand. I'm still not sure if it did me good or harm as a heat protectant, I was afraid to continue using it. I apply it after styling or before bed.

Girls! (and possibly boys!), I have tried various oils in the past that simply provided temporary smoothness, nothing more. I thought since it has become a trend, let's give this one a try. I generally don't get easily excited and I'm not the type to imagine that something works just because everyone says so. But truth be told, it is really good! After washing my hair, I apply a little before drying it, and once the hair is dry, I apply it again, more evenly on the ends and strands. I straighten and comb it, and my hair becomes silky! It has a subtly beautiful scent, leaves a lightweight feeling, fingers easily glide through the hair, and it reminds me of the feeling when you leave the hair salon! (Every time I wondered what they put on my hair to achieve that and why I couldn't do it myself;;) In short, I highly recommend it! I will keep buying it until I find something better!! Enjoyyy!

By far the best hair oil. I have tried many others that are supposed to be better. Very lightweight feeling after use compared to other oils that are much thicker. I use it before and after styling.

The best hair oil I have tried, I have thin hair but a lot of it, the fact that it is so lightweight makes me prefer and use only this, it may seem like the quantity is small but it's not true, it is concentrated and literally you only need 2 to 3 drops, so it lasts a long time, I have had it for 9 months and I haven't even reached half of it and I use it almost daily on the ends, I would advise you not to use it as a heat protectant even though it says so in the instructions, at the end of the day it is oil, it's better to use a cream or spray heat protectant, now as for whether it prevents split ends, etc. I can't say for sure because I also use other products like some from the L'Oreal Professional Pro Longer range and Olaplex 6, finally if you have thick hair and a lot of it, I would suggest getting another one like Kerastase or Moroccanoil which are heavier, there is a chance that N7 may not work for you

The quantity may be small but it lasts a lot because you only need a few drops each time. It is perfect for fine hair as it doesn't weigh it down but moisturizes it and makes it shine. It is much lighter than Moroccanoil but it has the same perfect result for thin hair. To get drops out, you don't need to shake it up and down, there is a trick. If you hold it upside down and lightly tap the bottom with your finger, as many times as you tap it, that many drops come out.

I combine it with number 6 (leave-in) and I apply two drops before spreading the cream on damp hair. Incredible feeling, velvety and healthy hair. It should be noted that my hair has many platinum highlights, so it has undergone some damage (although it is in very good condition). I highly recommend it in combination with number 6. It is good on its own, but I don't think it is cost-effective.

Very nice oil with a lightweight formula that doesn't make the hair greasy but at the same time moisturizes and somewhat controls frizz. I wouldn't say it's particularly "bonding" because I haven't seen any difference in the hair structure, but it has quite good characteristics and it's worth buying.

I have dyed blonde hair with highlights, medium to long length with coarse hair that frizzes and is mostly dry. With daily use 2-3 times a day, the oil lasts me 4-5 months. It is also important that its packaging doesn't allow you to use more than you need (you keep it upside down and dispense drops with a tap), it is also an ideal packaging size to fit even in the smallest toiletry bags.

I would like there to be a version with a stronger anti-frizz action, even if its composition was a bit heavier.

It is the best! I have thick hair with coarse strands and I mix it with Olaplex 6 cream. I apply it to my hair, brush it while drying, and it looks like I just came out of a salon! I love it, I love it! It lasts a long time, I will definitely buy it again.

the best of all hair oils I have used. expensive but here on skroutz you can find it at a better price and in the end the quantity of the packaging is not so small. only 2-3 drops are needed each time.

I didn't read any reviews before buying it, it's the best thing I've bought since number 3. It makes the hair strong, shiny, and it really doesn't burn with heat!! I recommend it, after a month the difference is noticeable!

I'm trying to understand why there are so many positive comments from Greeks and foreigners who have tried it. I'm still crying over wasting my money, regretting buying it, it doesn't do anything at all... I wonder how there are some people who are crazy about this product...

The bottle is halfway through, I use it with the 6 on my hair in general, I can't say that I saw crazy results. At first, I was excited, but it didn't work on the ends of my hair (I have thin and dyed hair). I also bought the 0 along with the 3 for treatment, it has helped me overall with the body of my hair, but it didn't cover anything on the ends from the company.

Excellent hair oil, smells perfect and doesn't make the hair greasy! I use it 4-5 times a week along with other products from the same series and I have seen tremendous results on my hair in the past few months. They have become longer, healthy, and shiny.

You see it so small in quantity and you think it's very expensive. HOWEVER, it lasts so so so so long. It needs the smallest amount you can imagine and works wonders. The reason I use it is to de-frizz my hair and make it smoother and "stronger". Although it's not as innovative as number 3, I consider it the best product from olaplex (I have tried 0, 3, 6, 7). This is because my hair type is very specific (fine hair, straight bleached hair, medium length with tendency for oiliness) and many products can easily make it greasy. This product doesn't weigh it down or make it oily at all and does what it promises.

Simply very good and despite its size it holds incredibly much. I have it now for about three months and it hasn't even reached half yet

Excellent oil. I was thinking a lot before buying it because of its price, but after almost two months of use, I can say that it's worth it. It requires a minimal amount and lasts a long time. I believe it does the best job on wet hair before styling. I can't judge if it helps with repair because I started using it along with other products, but it definitely gives shine to the hair and helps with frizz.

What oil is this!!!! What I was missing all this time!! I didn't want to buy it because I consider it a joke to spend almost 30€ for a 30ml product.
However, the oil is really good. It left my hair silky and very shiny with just 2 drops. I have blonde hair up to my shoulders and with 2 drops, they became silky and smooth. Much better than the cream (no 6).

I suggest applying it to wet hair. I also tried it on dry hair, it gives them a nice hydration but only for a short time. When I used it after showering, the true ability of this product became apparent. It completely transformed my hair. It was as if I had gotten a haircut after the very first use.

I received it yesterday so I don't have a strong opinion. The packaging is not convenient, I would prefer it to have a small pump for easier product dispensing. It has a nice scent, it does make my hair soft (mine are damaged and dyed) and it does give a shine. Time will tell for the rest. Also, it requires a small amount

I used it in combination with shampoo conditioner and number 6 for almost 2 to 3 months, I didn't see any difference in my hair. It is a simple product that I don't consider helped me enough and it is expensive for the result it gives you!