My doctor recommended it to me due to a deficiency shown in my blood tests. From the first capsule, I started having a severe headache that wouldn't go away with any painkiller. After 5 days of continuous use and since I had nothing pathological that could justify the headaches, I stopped it and they immediately ceased. Maybe the 4000iu was too much. I will try the 1000iu to see what happens.

If it doesn't have K2, it does nothing.
So it does nothing.
Not that I saw any difference with a 5000 and K2 that I've been taking for 2-3 months now, but just saying.

I don't know if it is related to taking it systematically during periods when I don't get sunlight, but now I rarely get sick. As a capsule, it is small, it hasn't caused me any problems and it is in oil (it looks like a smaller Omega-3 capsule) for better absorption.
I consider it an excellent choice, regardless of its price, which is lower than many others.

I have been taking this vitamin for years and it definitely works because all the tests I do come out very good. I had been diagnosed with a deficiency and an endocrinologist had recommended vitamin D3 from a Greek company. At some point, I preferred this one from Lamberts because I like its form, which is a small capsule and is swallowed very easily.

I use it in cycles, alternating it with other supplements. Vitamin D (in my case I use 1000 mg twice a week) helps with many functions.

I take D3 due to osteopenia and asthma. I decided to try another company's product because of the low cost, but you get what you pay for. After 1 week of taking it, I started having a cough and pain in my left hip. I didn't understand why, and for 2 months while I was taking this particular vitamin, the pain in my left hip continued and I was using Aerolin. I thought that the only change I made was the brand of D3. I stopped it, went back to Lambert, which is indeed twice the price, but the hip pain stopped, and so did the need for Aerolin.

I believe that it is very effective if I also consider the last osteoporosis test, which was quite good.

It is essential for the prevention of osteoarthritis and is also the enemy of the coronavirus. The 2000 iu was not sufficient.

They have helped me a lot with my energy levels! I had reached a point where I didn't have the strength to get through my 24 hours, and these saved me!

It does its job, with D3 I take it every day and (in a reasonable period of 1-1.5 years) the prices have leveled out. The pharmacist scared me a bit about the number of cancers that follow due to D3 deficiency. But keep in mind that the whole Mediterranean has the same problem, I would recommend a check and this product does its job.

Before use, the blood tests showed complete deficiency. After using the vitamins 4000iu, it showed satisfactory adequacy. (The use of 1000iu that I had used before was not sufficient for me..) I also consider it ideal for the prevention of the coronavirus as well as for mitigating its effects.

Excellent vitamin! I had a deficiency, and 3 months later I did tests and came back to normal! I also noticed various improvements in my immune system, muscle pain, and joints!

It does the job, but the best thing is to boost it with a diet... it's great for the winter.

The review is purely personal and subjective because, by examining the ingredients of the product due to my special diet, I noticed that glycerin, corn starch, and carrageenan are prohibited for me.

Undoubtedly, it is effective. The measurements of D are now consistently at 40+ from a maximum of 20, and all this in just a few months of use. However, the most important thing to consider is the combination with K, necessarily.

Quite satisfied with the product. I followed the intake for about 3 months after exams where insufficiency was detected. Restored to normal levels.

Completely satisfied with the product and especially with the company that I fully trust in other products as well.

I highly recommend it, I also use the same company's Omega-3! I am very satisfied.

And let's not forget, Vitamin D3 also protects against covid 19 :)

This vitamin brought me back to the beginning of the normal range after exams. I expected a little better.

The price is very good for the quantity it has, the results are satisfactory with a test before and after. Dosage depends on what your doctor will say, I had one per day for maintenance

My doctor recommended it to me after blood tests as I had a deficiency. Good price for 4000 iu/capsule, I will come back when I do the next blood tests.

Very good after a serious lack due to my pregnancy, my endocrinologist recommended them to me. I saw results in fatigue and headaches within 3 weeks

The best vitamin D3 supplement on the market. My levels in the tests have been consistently, significantly above the limit for years.

Maybe the best on the market. The levels of d3 increase quite quickly and remain stable with frequent use. I wouldn't change it with any other.

They are good, in the form of very small capsules, not pills. After 2 months of use, it only caused me insomnia.

Vitamin D3 in a sufficient quantity and 120 capsules at the price that the domestic company offers for 60. The 4,000 IU is a good amount for daily use in case of deficiency. Generally, with vitamin D, we want not only to get out of deficient levels or to maintain within the limits of insufficiency, but to have those levels with which our body can function optimally. It is good to be above 40 ng/mL. To reach there and maintain those levels, 4,000 IU is a good dosage.

It is good to take magnesium and vitamin K2 together (many formulations include it).

Very good product. 120 capsules at a very good price. It has been proven to correct vitamin D levels in a recent test.

I bought it during my pregnancy! Within 4 months, my vitamin D went from 19.6 to 40.2! Very effective and easy to take!

I had a vitamin D3 deficiency and with the Lambert's capsules for 4 months during the winter, my blood levels returned to normal.