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Vitamin D3 & K2 MK4 Tablets

Vitamin D3 & K2 MK4 Tablets

Regular price £7.99 GBP
Regular price Sale price £7.99 GBP
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Why Vitamin D3 and Vitamin K2-MK4?

Both Vitamin D and Vitamin K2-MK4 work together to promote the effects of each other. These ingredients are often combined as current evidence indicates that an intake of both vitamins together is most effective to achieve optimal bone and cardiovascular health.

Vitamin D3

Vitamin D is a fat-soluble vitamin which is stored in the body’s fat cells. There are two main forms of Vitamin D: Vitamin D2 (Ergocalciferol) and Vitamin D3 (Cholecalciferol). 

We obtain Vitamin D through both our diet and the sun. In countries where sunlight is limited and not as strong, such as the UK, people rely on dietary intake or supplementation of the vitamin to meet the recommended intake. Vitamin D occurs naturally in specific foods like salmon, tuna and mackerel, as well as egg yolks. Certain foods have been supplemented since the 1930s as we can’t achieve our Vitamin D requirements through food alone. These foods include milk, cereal and some orange juices. 

The role of Vitamin D is to contribute to the absorption and utilisation of Calcium and Phosphorous, which helps with the maintenance of bones and teeth. A stronger bone density reduces the risk of falling associated with postural instability and muscle weakness. This is especially vital amongst the older adult as falling is a risk factor for bone fractures among men and women 60 years of age and older.

Vitamin K2-MK4

There are several forms of Vitamin K, and Vitamin K2 is the secondary form, also known as Menaquinone. Menaquinone 4 is a type of Vitamin K, produced via the conversion of Vitamin K1 which occurs in the pancreas, testes or arterial walls. The half-life of MK4 is very short at an hour and a half. This means that the radioactivity of the vitamin decreases in value by 50% over one and a half hours.

Vitamin K2-MK4 contributes to normal blood clotting to close open wounds. The vitamin also has an essential role in the maintenance of normal bones, as mentioned in its synergistic relationship with Vitamin D3. 

Vitamin K is found in a variety of foods, most commonly in those that photosynthesise or any animal that consumes photosynthesised foods. These foods include green leafy vegetables such as broccoli, watercress and peas, as well as cereal grains and vegetable oils. Meat and dairy foods also contain Vitamin K but in smaller quantities.

Our Vitamin D3 and Vitamin K2-MK4 tablets

Oxford Vitality sells Vitamin D3 and Vitamin K2-MK4 combined in a 6mm tablet. We offer four product quantities to choose from. Please be aware that this product is suitable for vegetarians, but not for vegans. 

Please note- we advise you to contact your health professional if you are pregnant, breastfeeding or taking any medication before use. Certain medications may interact with Vitamin K2, including those for diabetes and anti-coagulants, and Vitamin K2 supplements should not be taken alongside these medications.

We recommend that both the 500 and 1,000 tablet options are more suitable for use by more than one person. This is to ensure that you are receiving full use of the product before its expiry date. For one person's use, we recommend the 120 or 240 tablet options.


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Customer Reviews

Based on 19 reviews
Philip Knight
Stupid question

What is the point of asking customers what they think of vitamin tablets? Unless you've got some massive deficiency causing scurvy or beriberi or something like that you're not going to feel any different.

Great service

Order despatched immediately in sensible waste-free packaging. Fourth time I have ordered from Oxford and every time service and product has been second to none. Thank you.


Arrived really fast good quality vitamins and great value

Christine Saunderson
Oxford Vitality - Vitamin D3 & K2 MK4 Tablets

My Chiropractor recommended the Oxford Vitality brand . Alongside my treatment I am taking D3 & K2 tablets as well as a separate D3 tablet ( just reviewed ) My Chiropractor spotted a Vitamin D3 deficiency from one of my symptoms. I can tell the tablets are having a good effect and will buy other supplements in future from Oxford Vitality. 5 Stars, recommended !

ms s atkinson

To early to say

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Shipping & Returns

Shipping is via Royal Mail 1st Class We dispatch orders on weekdays up to 5 pm. Royal mail quote delivery times 1-2 days for 1st class and 2-3 days for 2nd class. Delays can happen, If delivery takes more than 5 working days for a UK order - please contact us immediately. For Europe, orders can take 10-14 Days. We are sorry but we do not dispatch our products to the rest of the world. We apologise for this lengthy period of time, unfortunately, express courier services are uneconomical to use with low priced products.

Please note, we DO NOT quote shipping. We will only make refunds where refunds are due. We apologise this process can not be more simple. Customs Declarations: We declare the value of all products as £15 - This is our average order cost and should not cause import duties or tax by your customs. All orders will be labelled generically as "Dietary Supplements".

To return an item, please dispatch it in its original wrapping and accompanied by a note outlining your name, address and reason for return. If you do decide that you would like to return your item, please have a look under the " terms and condition" page.