Size
Doctor's Best Natural Vitamin K2 MK7 with MenaQ7 plus D3
Doctor's Best Natural Vitamin K2 MK7 with MenaQ7 plus D3 keeps it simple: a daily dose of vitamin D and vitamin K2, in a vcaps format, 60 vcaps per pack.
Why people take it
- Vitamin D contributes to the normal function of the immune system
- Vitamin D contributes to the maintenance of normal bones and teeth
- Vitamin D contributes to normal muscle function
- Vitamin D contributes to normal absorption and utilisation of calcium and phosphorus
- Vitamin K contributes to the maintenance of normal bones
- Vitamin K contributes to normal blood clotting
How to use
Take as directed on the pack, ideally with food and at the same time each day.
Good to know
- Format: vcaps
- Caffeine free
- Vegetarian-friendly capsule shell
A food supplement, not a substitute for a varied diet and healthy lifestyle. Do not exceed the stated dose. Keep out of reach of children.
At a glance
£0.44
per daily dose
Limited
evidence for vitamin k2 (mk-7)
Our honest take
A combination capsule with 180 µg of vitamin K2 (MenaQ7 MK-7) and 25 µg (1,000 IU) of vitamin D3. The vitamin D dose is sensible for everyday use, covering the NHS's 10 µg autumn and winter advice with room to spare. The K2 dose is high at more than twice the daily reference intake, and evidence that extra K2 helps bones or arteries in healthy people is still limited. At about 45p a day you are paying a lot for the K2; plain D3 costs a few pence.
- You specifically want vitamin K2 alongside a moderate vitamin D dose
- You eat few leafy greens or fermented foods
- You take warfarin or another anticoagulant: vitamin K affects how it works
- You just want vitamin D: plain D3 is far cheaper
- You already take a multivitamin or other product with vitamin D or K
The science
Vitamin K2 (MK-7)· evidence: Limited
Vitamin K2 (menaquinone, usually as MK-7 in supplements) is one of the forms of vitamin K. The body needs vitamin K to make proteins involved in blood clotting and bone. Most adults get enough vitamin K from green vegetables, vegetable oils and some fermented foods, and true deficiency is rare in healthy adults.
Vitamin K2 is often sold alongside vitamin D3 on the idea that it helps direct calcium into bone. Trials of K2 on bone density and fractures are small and mixed, and the effect in well-nourished people is uncertain. Claims about arteries or heart health are not established.
Adding K2 to a vitamin D supplement is reasonable but not necessary for most people. It mainly adds cost.
Vitamin K contributes to normal blood clotting. Vitamin K contributes to the maintenance of normal bones. (Applies where a daily dose gives at least 15% of the NRV, i.e. 11.25 µg.)
Typical dose: Adults need about 1 µg per kg of body weight a day (around 70 µg for a 70 kg adult), mostly met by diet. Supplements usually give 45 to 200 µg of MK-7.
Safety: Vitamin K can stop warfarin and similar anticoagulants (vitamin K antagonists) working properly. Anyone on warfarin must not take vitamin K supplements without talking to their GP or anticoagulant clinic. The FSA notes that 1 mg or less a day from supplements is unlikely to cause harm in other people.
Research we looked at:
NHS. Vitamin K. nhs.uk/conditions/vitamins-and-minerals/vitamin-k
EFSA NDA Panel. Dietary reference values for vitamin K. EFSA Journal 2017;15(5):4780.
Mott A, Bradley T, Wright K, et al. Effect of vitamin K on bone mineral density and fractures in adults: an updated systematic review and meta-analysis of randomised controlled trials. Osteoporos Int 2019;30(8):1543-1559.
Vitamin D3· evidence: Strong
Vitamin D3 (cholecalciferol) is the form the skin makes from sunlight. In the UK there is not enough strong sunlight from about October to March, so many people have low levels over winter. Good-quality trials show supplements reliably raise blood levels and correct deficiency, and that matters for bone health in people who are low.
The NHS advises everyone to consider 10 µg (400 IU) a day in autumn and winter, and all year round for people who get little sun, cover their skin, have darker skin or live in care homes. For people who already have adequate levels, large trials have not shown that extra vitamin D prevents falls, fractures or other illness.
In short: a modest daily dose is sensible and cheap insurance for most UK adults in winter. Very high doses are not better and should only be taken on medical advice.
Vitamin D contributes to the normal function of the immune system. Vitamin D contributes to the maintenance of normal bones. Vitamin D contributes to the maintenance of normal muscle function. Vitamin D contributes to the maintenance of normal teeth. Vitamin D contributes to normal absorption/utilisation of calcium and phosphorus. (Applies where a daily dose gives at least 15% of the NRV, i.e. 0.75 µg.)
Typical dose: 10 µg (400 IU) a day is the NHS advice for adults and children over 1. Doses of 25 µg (1,000 IU) to 50 µg (2,000 IU) are common and safe for adults. Babies under 1 need 8.5 to 10 µg a day unless they have more than 500 ml of formula.
Safety: Do not take more than 100 µg (4,000 IU) a day without medical advice (FSA/NHS); children aged 1 to 10 should not have more than 50 µg, and babies under 1 no more than 25 µg. Long-term very high intake can raise blood calcium, which can damage the kidneys and heart. People with kidney disease, sarcoidosis or high calcium levels should speak to their GP first.
Research we looked at:
NHS. Vitamin D. nhs.uk/conditions/vitamins-and-minerals/vitamin-d
Scientific Advisory Committee on Nutrition (SACN). Vitamin D and Health. 2016.
EFSA NDA Panel. Scientific opinion on the tolerable upper intake level for vitamin D. EFSA Journal 2023;21(8):8145.
Bolland MJ, Grey A, Avenell A. Effects of vitamin D supplementation on musculoskeletal health: a systematic review, meta-analysis, and trial sequential analysis. Lancet Diabetes Endocrinol 2018;6(11):847-858.
Ingredients & nutrition
Always check the pack you receive, as manufacturers sometimes update recipes.
How to use
Price per dose & how it compares
| Product | Size | Price | Per daily dose |
|---|---|---|---|
| This product | 60 vcaps | £26.99 | £0.44 |
| Carlson Labs Super Daily D3 + K2 | from £29.42 | £0.16 | |
| Apollo's Hegemony Vitamin D3 with K2 MK7 | from £21.69 | – | |
| Aventus Supplements Vitamin D3 + K2 | from £23.32 | – |
Cost per daily dose lets you compare packs of different sizes fairly.Worked out from our current prices.
Food supplements should not replace a varied, balanced diet and healthy lifestyle. General information, not medical advice. Speak to your GP or pharmacist first if you are pregnant or breastfeeding, have a medical condition or take medication.
Doctor's Best Natural Vitamin K2 MK7 with MenaQ7 plus D3 keeps it simple: a daily dose of vitamin D and vitamin K2, in a vcaps format, 60 vcaps per pack.
Why people take it
- Vitamin D contributes to the normal function of the immune system
- Vitamin D contributes to the maintenance of normal bones and teeth
- Vitamin D contributes to normal muscle function
- Vitamin D contributes to normal absorption and utilisation of calcium and phosphorus
- Vitamin K contributes to the maintenance of normal bones
- Vitamin K contributes to normal blood clotting
How to use
Take as directed on the pack, ideally with food and at the same time each day.
Good to know
- Format: vcaps
- Caffeine free
- Vegetarian-friendly capsule shell
A food supplement, not a substitute for a varied diet and healthy lifestyle. Do not exceed the stated dose. Keep out of reach of children.
Related Products
You may also like
Your cart
Your cart is empty
- Choosing a selection results in a full page refresh.
- Opens in a new window.