Introduction to Vitamin D3 + K2

Daily support for bones, muscles, and immune function

Our Vitamin D3 + K2 softgels provide a simple and convenient way to complement your daily nutrient intake. Combining vitamin D3 with vitamin K2, they contribute to the maintenance of normal bones, while vitamin D also contributes to the normal function of the immune system. Designed for convenience and consistency, it fits easily into your daily routine.

For bones, muscles and long-term mobility

Beyond their role in bone health, vitamin D also contributes to normal muscle function, supporting everyday movement and physical activity. Research has shown that vitamin D supplementation can have a small positive effect on muscle strength, particularly in people with low vitamin D status [1]. Research on vitamin K2 has also shown positive effects on markers of bone quality and strength [2].

Vitamin D deficiency

Vitamin D status can vary considerably between populations and regions, with factors such as geography, lifestyle and season all playing a role [3,4]. In one European analysis, 40.4% of individuals had vitamin D levels below 50 nmol/L, a commonly used reference value for vitamin D status [3]. Global data also show substantial variation in vitamin D levels, with many studies reporting average values below this threshold [4]. Together, these findings show that vitamin D levels can vary widely across populations and highlight the role of dietary sources of vitamin D as part of a balanced diet and healthy lifestyle.

Role of vitamin D

Vitamin D contributes to the normal absorption and utilisation of calcium and phosphorus, and to the maintenance of normal bones [5]. It also contributes to the maintenance of normal muscle function [6] and to the normal function of the immune system. Vitamin D receptors are found in various tissues throughout the body, reflecting the vitamin’s involvement in a range of physiological processes [5]. As a fat-soluble vitamin, vitamin D therefore plays an important nutritional role in supporting these normal functions as part of a balanced diet and healthy lifestyle.

Role of vitamin K

Vitamin K exists in different forms, with vitamin K2 (menaquinones) showing distinct distribution and roles in the body compared to vitamin K1. Evidence indicates that vitamin K2 contributes to the normal function of vitamin K–dependent proteins, which are involved in processes such as bone health and calcium handling. At the same time, dietary intake and status of vitamin K2 can vary depending on dietary patterns and food sources, with some populations having relatively low intake levels [7,8]. Together, this highlights the importance of including reliable sources of vitamin K2 as part of a balanced diet.

Vitamin D + K working together

Vitamin D and vitamin K are functionally connected, as vitamin D supports the production of vitamin K dependent proteins involved in calcium metabolism [9]. The two vitamins also have complementary roles in calcium-related processes: vitamin D contributes to the normal absorption of calcium, while vitamin K contributes to the maintenance of normal bones [10].

In simple terms, vitamin D helps make calcium available to the body, while vitamin K supports the proteins involved in using that calcium in bone. This complementary relationship is why we combine the two vitamins in one formula. We specifically use vitamin D3 (cholecalciferol), which has been shown to raise blood vitamin D levels more effectively than vitamin D2, and vitamin K2 as MK-7, a well-absorbed form that remains in circulation for longer than other forms of vitamin K [2,11].

Why do we use extra virgin olive oil?

Vitamin D is a fat-soluble vitamin, which means that dietary fat plays a role in its absorption. That’s why we use extra virgin olive oil as a carrier. Naturally rich in monounsaturated fats, it provides a suitable lipid-based matrix for vitamin D3. In digestion models, vitamin D3 delivered with olive oil has shown favourable bioaccessibility, supporting its use as a practical carrier within the formulation [12,13,14]

How to use

Take 1 softgel per day with water, preferably with a meal.

Available format

Softgel capsule

Add it to your daily routine and stay consistent with your intake.

What's inside?

Active ingredients (per recommended daily serving)

Ingredient

Amount

% NRV*

Vitamin D3

25 µg

500%

Vitamin K2 (MK-7)

100 µg

133%

*NRV = Nutrient Reference Value


Ingredients: Extra virgin olive oil, capsule shell (modified starch, humectant: glycerol, water), vitamin K2 (menaquinone-7), vitamin D3 (cholecalciferol)

 

Wrapping it up

Vitamin D and vitamin K have complementary nutritional roles, particularly in relation to calcium metabolism and the maintenance of normal bones. Combined in a convenient softgel and delivered with a suitable carrier like extra virgin olive oil, they provide a simple and practical way to complement your daily nutrient intake. It can also be taken alongside your Omega-3 supplement as part of the same routine.

At Jimmy Joy, we focus on simple, effective solutions using well-researched ingredients, transparent formulations, and formats that fit easily into your routine. No unnecessary extras, just a straightforward approach to help you stay on top of your nutrition.


Food science and Nutrition are constantly advancing, and we continue to monitor with great care to deliver the healthiest meal possible. Check out our sources below if you’re curious and want to dive in yourself.

Sources

  1. Beaudart C, Buckinx F, Rabenda V, et al. The effects of vitamin D on skeletal muscle strength, muscle mass, and muscle power: A systematic review and meta-analysis of randomized controlled trials. The Journal of Clinical Endocrinology & Metabolism. 2014;99(11):4336-4345. Available from: https://pubmed.ncbi.nlm.nih.gov/25033068/
  2. Sato T, Inaba N, Yamashita T. MK-7 and its effects on bone quality and strength. Nutrients. 2020;12(4). Available from: https://pubmed.ncbi.nlm.nih.gov/32244313/
  3. Cashman K D, Dowling KG, Škrabáková Z, Gonzalez-Gross M, Valtueña J, De Henauw S, et al. Vitamin D deficiency in Europe: Pandemic? The American Journal of Clinical Nutrition. 2016 Feb 10;103(4):1033–44. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5527850/
  4. Hilger J, Friedel A, Herr R, Rausch T, Roos F, Wahl DA, et al. A systematic review of vitamin D status in populations worldwide. British Journal of Nutrition. 2013 Aug 9;111(1):23–45.
  5. Bouillon R, Marcocci C, Carmeliet G, Bikle D, White JH, Dawson-Hughes B, et al. Skeletal and extraskeletal actions of vitamin D: Current evidence and outstanding questions. Endocrine Reviews. 2018 Oct 12 ;40(4):1109–51. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6626501/
  6. Ceglia L. Vitamin D and skeletal muscle tissue and function. Molecular Aspects of Medicine. 2008 Dec;29(6):407–14.
  7. Beulens JWJ, Booth SL, van den Heuvel EGHM, Stoecklin E, Baka A, Vermeer C. The role of menaquinones (vitamin K2) in human health. British Journal of Nutrition. 2013 Apr 16;110(8):1357–68.
  8. Walther B, Karl JP, Booth SL, Boyaval P. Menaquinones, bacteria, and the food supply: The relevance of dairy and fermented food products to vitamin K Requirements123. Advances in Nutrition. 2013 July 8;4(4):463–73. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3941825/
  9. van Ballegooijen AJ, Pilz S, Tomaschitz A, Grübler MR, Verheyen N. The synergistic interplay between vitamins D and K for bone and cardiovascular health: A narrative review. International Journal of Endocrinology. 2017; 2017(1):1–12. Available from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5613455/
  10. Khandelwal A, Ahmed KA. Vitamin D and vitamin K: Synergistic roles and emerging evidence for combined supplementation. Journal of Mid-life Health. 2025 Oct 1;16(4):505–8. Available from: https://journals.lww.com/jomh/fulltext/2025/10000/vitamin_d_and_vitamin_k__synergistic_roles_and.26.aspx
  11. Tripkovic L, Lambert H, Hart K, et al. Comparison of vitamin D2 and vitamin D3 supplementation in raising serum 25-hydroxyvitamin D status: a systematic review and meta-analysis. The American Journal of Clinical Nutrition. 2012;95(6):1357-1364, Available from: https://pubmed.ncbi.nlm.nih.gov/22552031/
  12. Schoener AL, Zhang R, Lv S, Weiss J, McClements DJ. Fabrication of plant-based vitamin D3-fortified nanoemulsions: Influence of carrier oil type on vitamin bioaccessibility. Food Funct. 2019 Apr 1; 10(4):1826–35. Available from: https://pubmed.ncbi.nlm.nih.gov/30874272/
  13. McCourt AF, O’Sullivan AM. Using food fortification to improve vitamin D bioaccessibility and intakes. Proceedings of the Nutrition Society. 2021 Nov 22;81(1):1–9.
  14. Mulrooney SL, O’Neill GJ, Brougham DF, O’Riordan D. Enhancing the bioaccessibility of vitamin D using mixed micelles - an in vitro study. Food Chem. 2022 Nov 30; 395:133634. Available from: https://pubmed.ncbi.nlm.nih.gov/35830776/