best vitamin d supplement

Vitamin D Supplements: Test & Reviews

Author: Anne Jonson

Diet & Nutrition Expert

Vitamin D is one of the essential vitamins that the human body needs to function. It is only produced in larger quantities by the body itself through solar radiation on the skin. The risk of a vitamin D deficiency is therefore very high, especially in the winter months. A long-term deficiency can lead to serious health problems.

If you too want to increase your vitamin D level or even suffer from a vitamin D deficiency, you’ve come to the right place. In our large vitamin D test you will learn the most important things about vitamin D itself as well as possible forms of administration and the correct dosage.

Our purchase criteria also support you in your purchase decision and provide you with the necessary information that you should consider when choosing the right vitamin D preparation.

  • Just under 40% of the population has a sufficient vitamin D level. According to studies, long-term vitamin D deficiency can be a contributory cause of serious diseases such as cancer, high blood pressure or circulatory disorders.
  • Vitamin D is formed when the skin is exposed to the sun. Since the sun does not show itself sufficiently, especially in the winter months, alternative ways of vitamin D must often be taken. Vitamin D supplements are available as over-the-counter medical products in pharmacies or as food supplements in drugstores.
  • Food supplements are not subject to any statutory regulations, while medicinal products have to be checked for their quality, effectiveness and safety.

Best Vitamin D Supplements

Best liposomal vitamin D3 + K2 liquid

This vitamin D3 + K2 preparation from sundt Supplements is a liquid, liposomal product. This means that the active ingredient is packaged in liposomes and thus protected. In this way, it can be absorbed by your body better, faster and in larger quantities. The liposomal vitamin D3 + K2 can therefore fully support your bones and your immune system.

With the purchase you get a 60 ml bottle, which makes about 30 servings. The drops are gluten and sugar free. In addition, care was taken during production that no genetically modified ingredients were used.

Best vitamin D all-rounder

The vegetarian organic alpha vitamin D capsules offer you vitamin K2 and omega 3 fats in addition to vitamin D3. They do not contain any additives. The omega 3 fats are obtained from algae and flaxseed and are generally very good for the body. They help him absorb vitamin D3 well.

Since vitamin D3 is obtained from lanolin (sheep’s wool), it is only a vegetarian, but not a vegan product. With this preparation you get an all-round supply of vitamin D3, vitamin K2 and omega 3.

Best vitamin D drops

The vitamin D3 drops from EXVital are free of any additives and their price is in the middle range. One drop provides you with 1,000 I.U. Vitamin D3 and the supplied pipette make it easier for you to dose.

The manufacturer EXVital produces its products according to the highest quality and safety standards. The high quality is guaranteed. The only active ingredient used is vitamin D3. The bioavailability is considerably increased by the special oil used.

Best vegan vitamin D drops

The Nature Love Vitamin D3 drops is a pure and vegan product that is particularly impressive because of its ease of use and dosage – as well as the absence of any unwanted additives.

One drop per day is recommended. According to the manufacturer, one bottle contains 1,350 drops. It is very easy to use because you can simply dose the drops with the pipette. They are particularly suitable for anyone who has problems swallowing tablets or capsules.

Best vitamin D softgel capsules

Nu U Vitamin D3 softgel capsules are easy to swallow and are taken daily with water. Since the shelf life of these softgel capsules is around 2 years, a larger pack can also be bought without any problems. You should also have no problem using the capsules before the expiration date.

Sunflower oil is used for the Nu U Vitamin D3 softgel capsules. Since the capsule shell is made of gelatine, the food supplement is not suitable for vegetarians or vegans.

Best sugar-free vitamin D capsules

These vitamin D capsules from Aavalabs support your muscles, bones and your immune system. They are made from natural ingredients, and olive oil has been added because the vitamin can be better absorbed by your body. They are GMO, gluten and lactose free. In addition, they do not contain any artificial colors, no preservatives and no sugar or sugar substitutes have been used in production.

The jar contains 365 capsules. The high-dose capsules are quickly and efficiently absorbed and get into your body quickly. Many customers who tried the capsules were won over by the purity and quality of the product.

Best vitamin D tablets

The GloryFeel Vitamin D3 tablets are high-dose and support the functions of bones, muscles and the immune system. The tablets manufactured are free of additives or magnesium stearates and are supplied in resealable packaging of 400 tablets.

This means that one packaging is sufficient for approx. 1 year and is therefore extremely economical. If you pay attention to brand quality and don’t want to reorder a new pack of vitamin D3 every month, then this product is the right choice.

Questions to Consider Before Buying Vitamin D supplements

Who should take Vitamin D?

The human body can produce its own vitamin D with the help of solar radiation, so it is not a vitamin in the classic sense. Only a small part of the vitamin D store is absorbed through food.

The majority of this vitamin is produced when the skin is exposed to sunlight (UVB rays). About 90% of the vitamin is built up in this way and only about 5% is absorbed through food. For this reason, a shortage is inevitable, especially in the winter months.

In winter, it is often recommended in our circles to regulate the vitamin D level with preparations so that there is no vitamin D deficiency.

If you belong to the group of people with an increased risk of vitamin D deficiency, we will give you the necessary information in the next few paragraphs. Nevertheless, you should definitely see a doctor if you have serious symptoms.

People with a high risk of vitamin D deficiency can be briefly divided into the following groups:

  • Elderly people: These have thinner skin, which can impair the production of vitamin D. Older women are particularly affected. A vitamin D deficiency could be linked to a decline in cognitive performance, depression, cardiovascular disease, diabetes and cancer.
  • Infants and children: On the one hand, the vitamin D content of breast milk is very low and, on the other hand, the skin of the babies is still too sensitive to be exposed to the blazing sun. A deficiency in vitamin D in childhood slows the growth of bones. This can lead to rickets in children. That is why it makes sense to prescribe vitamin D supplements for infants and children.
  • People with dark skin: These need longer to form vitamin D, because darker people absorb UVB rays more strongly due to the increased melanin content. However, this relationship has not been conclusively proven and could also be due to a lack of nutrients due to an unbalanced diet.
  • People who often work indoors: People who, for example, Sitting in an office all day for work-related reasons and hardly getting daylight are also more likely to be affected by a vitamin D deficiency. Enjoying lunch outdoors in summer can therefore be very valuable.
  • Insufficient skin contact with the sun: People who disguise themselves for religious or cultural reasons are less exposed to sunlight and are therefore more likely to suffer from a lack of vitamin D.

How is a vitamin D deficiency noticeable?

Vitamin D regulates numerous processes in the body cells. It participates in many metabolic processes and functions in the body. The most important functions include:

  • Structure of bones and teeth
  • Normal cell division
  • Forms the body’s own antibiotics
  • Regulates the immune system
  • Structure and regeneration of bones
  • Reduction of stress

Many people do not notice that they are suffering from a vitamin D deficiency, because this only becomes visible in the first symptoms after a while. A long-standing, untreated vitamin D deficiency can in some cases be a contributing factor to the following clinical pictures:

  • Cancer
  • Diabetes
  • Arthritis
  • Osteoporosis
  • Alzheimer’s and dementia
  • High blood pressure
  • Cardiovascular diseases

Depending on the season and diet, the vitamin D level often fluctuates. Therefore, the following applies: Only when vitamin D is missing for a longer period of time is it referred to as a deficiency.

First of all, a vitamin D deficiency is noticeable through the following symptoms:

  • Chronic exhaustion
  • Muscle aches and pains in the lower back
  • Depressed mood and listlessness
  • Nervousness
  • Sleep disorders
  • Hair loss
  • Cravings for sweets
  • Tooth decay and gingivitis
  • Infectious diseases like the flu

The following applies to everyone: regularly test the vitamin D level to prevent serious illnesses and reduce symptoms of existing illnesses.

How can I fix my vitamin D deficiency?

First of all, it should be noted that although there is often talk of a deficiency, a serious vitamin D deficiency that can lead to diseases is rather rare.
There are different methods by which a vitamin D deficiency can be remedied. The following are worth mentioning:

  • Sufficient sun
  • Solarium
  • Foods containing vitamin D
  • Preparations

Probably the most natural way to remedy the vitamin deficiency is through sunbathing. Of course, only the time required for the production of vitamin D should be spent in the sun, otherwise the risk of skin cancer increases.

The individual time depends on the skin type, the place of residence and the season. 80-90% of the vitamin D level is produced by our body or our skin from the sun. This can often be achieved with a 20-30 minute walk two to three times a week.

Soaking up the sun should always be considered as the first means of maintaining healthy vitamin D levels.

If the sun does not show up, you can even sunbathe in the tanning salon. Vitamin D is formed very quickly in the solarium, so you don’t have to wait until your skin is brown or even red. Remember that the tanning salon is a stopgap solution!

Another method to remedy the deficiency is through targeted consumption of food. But keep in mind that usually only about 5% to max. 10% of this vitamin can be absorbed through food.

Because there are only a few foods that contain vitamin D, and most of them contain only very small amounts of vitamin D. Reaching the necessary vitamin D level through food alone is almost impossible.

Possible foods that you can consume to counteract the vitamin D deficiency are, for example, milk, mushrooms, egg yolks, lamb, beef or veal liver and fish (e.g. herring, salmon).

Vegans in particular often do not consume enough vitamin D in their diet because vitamin D can be found in many animal products.

If these three methods have been used and you still suffer from a vitamin D deficiency, it is recommended that you also take vitamin D supplements.

But the question of whether vitamin D supplements are really necessary or not is hotly debated in specialist circles.

How can you measure the vitamin D level?

You can have your vitamin D level tested by a doctor or measure it yourself with a test kit.

You can buy the test kit in pharmacies, drugstores or on the Internet. In this handy kit you will find precise instructions on how to draw blood from your finger. After the collection, you send the blood to the specified laboratory. Only a few days later you will receive the results with your vitamin D value.

It is not the actual vitamin D that is measured, but the vitamin’s stored form. The storage form is called 25-hydroxy-vitamin D (short: 25 (OH) D).

This value is more representative because this type of storage is not a snapshot like the vitamin D storage. 25 (OH) D is a precursor of vitamin D, which is stored in the blood and converted into the active vitamin D form when required.

Your self-assessment is also relevant. With questions like “Am I enough in the sun?” or “Do I use sunscreen when I’m in the sun” (sunscreen prevents the production of vitamin D in the skin) you can guess whether your vitamin D level is sufficient or not.

Which dose is right for me?

Organizations disagree on the recommended daily intake.

However, other specialists, such as the Vitamin D Council, advise that the need be based on personal value. Because many experts today agree that the recommended daily amount is too low.

It should also be noted that vitamin D toxicity can only occur from an amount of 40,000 to 50,000 IU per day. That means: only at these values can the ingested amount be harmful to the body. And even this only for a longer period of time.

Studies have shown that in certain diseases, such as multiple sclerosis and prostate cancer, an increased intake can even have a positive effect. However, you should always discuss the increase in intake with your doctor.

In what form can vitamin D be taken?

Compared to vitamin D2, vitamin D3 can be better absorbed and used.

In order to regulate the vitamin D level, it is therefore advisable to take vitamin D3. Nowadays, vitamin D3 is often used in food supplements and medicinal products anyway.

Vitamin D3 supplements are often obtained from lanolin, the wool wax of sheep. But there are also vegan alternatives, such as vitamin D3, which is extracted from lichen (lichens).

In drugstores and pharmacies you can find vitamin D in the form of powders, juices, capsules, oils or tablets. These preparations are relatively straightforward to take, so the time of day, for example, does not matter.

Vitamin D3, vitamin K2 and magnesium are required to keep the vitamin D level in balance.

Vitamin D3 helps with the absorption of calcium and vitamin K2 guides the calcium into the bones.

Calcium, vitamin K2 and vitamin D are central to the metabolism of our bones. They not only form the bone mass, but are also responsible for maintaining the firm bone structure.

When taking it, you should therefore always consume sufficient magnesium and vitamin K2, otherwise there may be symptoms of deficiency despite taking vitamin D3.

What types of vitamin D supplements are there and which one is right for you?

If you want to buy a vitamin D supplement, there are three alternatives you can choose between:

  • Vitamin D as an over the counter medicinal product
  • Vitamin D as a dietary supplement
  • Vitamin D in combination with K2

You have the choice between powder, capsules or tablets.

Taking the different preparations has advantages and disadvantages. Depending on the value of your vitamin D level and your health conditions, another type is suitable.

The following section should give you clarity in your decision. Because often there is no clear demarcation and it leads to confusion for patients.


Vitamin D Over-The-Counter: Advantages & Disadvantages

A medicinal product must always be able to prove its effectiveness, safety and quality.

And these are certainly the three most relevant advantages compared to dietary supplements. From a quantity of 1,000 I.U. (25 µg) per divided dosage form, vitamin D is subject to prescription.

Vitamin D as a dietary supplement: Advantages & Disadvantages

In contrast to medicinal products, food supplements do not have to be approved by the NEM, but only registered by the BVL.

In the case of dietary supplements, there are no legal maximum quantities to be shown. In rare cases, therefore, there is a risk that dietary supplements will be sold at a higher dose than prescription drugs.

Vitamin D in combination with K2: Advantages & Disadvantages

Vitamin D3, vitamin K2 and magnesium are required to keep the vitamin D level in balance. Therefore, it makes sense to take a preparation that combines vitamin K2 and vitamin D3.

The intake of vitamin D3 and vitamin K2 is essential for healthy bones, the prevention of osteoporosis and a healthy cardiovascular system.

Purchase criteria: Use these factors to compare vitamin K supplements

In the following we will show you which aspects you can use to decide between the multitude of possible vitamin D preparations.

The criteria by which you can compare vitamin D supplements include:

  • Ingredients
  • Dose
  • Type of intake (powder, capsules, tablets, etc.)
  • Flavor
  • Purity (combination with other vitamins)

In the following sections you will find out what is important for the individual criteria.


Medicines do not contain any toxic or health-critical ingredients, but since vitamin D as a food supplement is not subject to any legal regulations, you should read the ingredients carefully before buying.

In addition, the question arises as to whether you want a vitamin D preparation made from animal products or would you prefer to fall back on the vegan alternative.


As already discussed, the dose should be made dependent on your own vitamin D level. Therefore, it is advisable to study the package insert for the medication very carefully. If you are unsure, you should contact a specialist (doctor or pharmacist).

Type of Intake

The selection of vitamin D supplements has increased significantly in recent years. It is entirely up to you whether you want to take vitamin D in the form of capsules, tablets, oils, powders, etc.


Nowadays, vitamin D can be found in different flavors (e.g. cherry), which can help children take it.


Vitamin D cannot work on its own, so the question often arises before buying whether you want to take your vitamin D in combination with vitamin K2.

Since vitamin D is very important for your health, it is recommended to invest sufficient time in finding the right remedy.

Facts about Vitamin D

What is the recommended maximum daily dose?

There is no consensus on the recommended maximum dose of vitamin D. For example, the Nutrition Society recommends a daily intake of 800 IU.

However, most vitamin D experts assume that this value is set too low. It is only sufficient to avoid a deficiency, but not enough to keep the vitamin D level at a healthy level.

The following formula can be used for guidance for healthy adults:

  • Vitamin D: 50IU per kg body weight
  • Vitamin K2: 2-3µg per kg body weight

Is vitamin D suitable for children?

Vitamin D is very important for both infants and children. Infants in particular who do not yet have a protective mechanism in their skin and therefore receive little direct sunlight belong to the groups with a high risk potential for deficiency symptoms.

In the first few years it is recommended to check the vitamin D level annually.

It is recommended to discuss the exact dose with your pediatrician.

How is a vitamin D overdose noticeable and what is the risk of an overdose?

Vitamin D can be stored in fat and muscle tissue. This increases the level of calcium in the blood, which can initially be seen as increased urination and thirst.

Nausea, vomiting, abdominal cramps and, in extreme cases, kidney damage or cardiac arrhythmias are further consequences of an overdose.

Such a dose can only be achieved with the supply of medication; such a high value cannot be achieved through the sun alone. Contact your doctor or alternative practitioner if you suspect an overdose.

4.9/5 - (15 votes)