Within less than 2 weeks we stopped the thumb sucking, along with discussion of course, but it helped a lot. My little one is almost 5 years old, and when she felt like she wanted to suck it, she would tell me, "Mom, shall we put on the little medicine with the awful taste?" At some point she just completely stopped asking for it....

Despite its strong bitter taste (I tried it myself), our little one continues to bite her nails. It works, but you also need the will to stop biting your nails. When she gets a bit older and understands better, I hope it will help more to break this bad habit.

Excellent! If you want, when you stop, it works!

The little one, 1 year old, was biting his nails. We tried it, from the first day he didn't like the taste and reduced it, in 3 days he stopped biting them.
Update: after months he went through a phase again where he was biting his nails. I put it on him again and in a few days he stopped biting them again.
It works

Within a week, the child completely stopped sucking the finger. Obviously, every child is different, but for us it worked its miracle extremely quickly!

For a 4.5-year-old child who had been putting their finger in their mouth since 9 months old, it worked wonders. From the very first night, after being disgusted, they stopped putting their finger in their mouth. They did it another 3-4 times, but now, after almost 2 months of use, this habit has been broken. One of the best 18€ I have ever spent. We had tried many things all this time, we even went to a child psychiatrist for advice, but the only thing that worked was this product. We will continue to use it until we are sure the habit is gone.

It did not help my 2.5-year-old son, from the first use he continued to put his hands in his mouth as usual

I used it to stop biting my nails. It leaves you with a very bitter taste the first few times. The truth is that after a while you get used to the taste. Personally, it didn't help me stop this bad habit unfortunately. It's also a matter of anxiety of course, which leads to nail biting..

It's very good. I give it 4 stars because although it has a bad taste, I got used to it and every now and then I bite my nails.

The taste lasts for up to 3 days depending on how many things you do with water. The taste in the mouth also lasts for quite a while, so gradually you learn the consequences if you put your hand in your mouth and it actually helps you to stop. Personally, it helped me to leave my nails alone as well as my lips, which I mainly pulled during stressful times

We tried it on our 6-year-old daughter.
On the first application, it disgusted her and she temporarily stopped putting her fingers in her mouth. From the second application onwards, she got used to it and it doesn't bother her at all.
Friends of ours who also used it on a 4-5 year old girl saw positive results and their little one stopped biting her nails.
Unfortunately, it seems to depend on each child individually, meaning how developed their taste abilities are. It is mentioned on the packaging as well.
We will have to find another product and we "cry" over the 18€ it cost us...

I thought that no matter what I put on my nails, I would still end up biting them.

Well, with this product I dare not touch a nail to my mouth. Very bitter taste. It lasts a whole day even with hand washing.

Good and effective, compared to others it lasts longer. About two days, the only negative is that it shines like a nail polish on the nail and is a little uncomfortable for me personally, otherwise the taste is bad enough to subconsciously make you not put your hands in your mouth

Very intense bitterness the first day, to the point where it transferred to whatever I ate. After a while, you get used to it somehow... after a day or two, it fades away, so it needs to be renewed... very effective

My daughter, who is 4 years old, wasn't even impressed with the taste. I tried it and I was disgusted, but the little one, whether I put it or not, continues normally...

We stopped thumb sucking in a 4-year-old child after trying everything else. With application every two to three days within a month, he never put his finger in his mouth again.

Pros:
- Effective, especially in the first months after opening
- Extremely long-lasting effect, even after manual dish washing or repeated hand washes

Cons:
- Price. Even at a relatively low price of 14€, this is still a whopping 1.4€/ml, much more than expensive Pure Parfum fragrances (e.g. by Hermes)
- The brush is short and does not easily reach the last 20% of liquid
- Due to bottle design that is not airtight, after the first few months, the liquid becomes very sticky, the bottle gets harder and harder to open, and a smooth application becomes almost impossible to achieve, which becomes even more frustrating given the high price tag.

Conclusion: I suggest trying out other models that offer a better price–performance ratio.

Very good product, it has a strong flavor and prevents nail biting although it needs to be applied every 2-3 days approximately. I saw immediate results.

Impressive before and after one month of use. It was worth 100% of its money. It stings a lot, it is impossible to put your nail in your mouth.

One of the best products against nail biting.
I am very satisfied.
I stopped nail biting after 12+ years.
I have been using it for a month and the difference is noticeable.
I had tried similar products from other companies in the past that didn't work.
MAVALA does what it promises.

It took us 2 months with on and off application. While it was new on her nails, my daughter (7.5) didn't put them in her mouth. The process and discussion around nail biting have now stopped her from eating them. I understand that it is somewhat psychological, so it requires overall care. I believe it is necessary to apply a product on the nails to remind her every time the automatic movement occurs.

Excellent product that is worth its money. I had been dealing with chronic nail biting for years and had tried everything. I discovered this nail polish after a recommendation from a friend. Now, I apply it to my nails once a week and the results are amazing.

It was very effective, managed to treat nail biting to a great extent!! However, it requires caution because for the first two days, this taste that it has to deter you from eating your nails is transferred everywhere (meaning that whatever you want to eat, you have to eat it with a fork and wear gloves in the kitchen, etc.).

Mavala helped me quit the bad habit of nail biting and the proof is the photos. First application on 18/4 (the photo with short nails) and the second photo on 13/6. The taste of it is so awful that it can stay in the mouth for a long time. It is truly the only product with which I managed to quit this 25-year habit. I highly recommend it!

Amazing product. The little one sucked on the finger from the ultrasound before even being born, and at 3.5 years old, it cut it with just one application

It is very effective. My little one cut the finger she was sucking for 3 years with just one application in an afternoon.

It delivers on its promises. It truly has a disgusting bitter taste that you want to get rid of from your mouth as much as possible.

Terribly bitter. The problem is if you want to eat fruit with your hands or feed a baby or cook. It's impossible with bare hands! Everything tastes bitter. Otherwise, it obviously does its job with such a flavor.

For the first time in my life (at 30), I managed to stop biting my nails and I feel very proud of it. I have tried various methods, but I always ended up getting used to the taste and the habit continued. This has such a terrible taste that lingers in the mouth for hours and you can hardly taste anything else. It stays on the tongue. It took me 3-4 bottles to succeed - not because I got used to the taste, but because I often forgot to apply it. Also, it is difficult to completely stop from one day to another, but if you take it step by step, it can be done. I still apply it occasionally, out of fear that I will mess with my nails without realizing it. However, it did the job!