Essential Support for Bones, Heart and Immunity for less than £5 a month
Learn About Vitamin D
Modern indoor living and long winter months can reduce natural vitamin D production. Learn how low sunlight exposure may affect your body and when supplementation can help.
The RPD Bestseller
RPD Vitamin D3 + K2
Modern indoor living and long winter months can significantly reduce natural vitamin D production. RPD Nutrition vitamin D3 + K2 is designed for people with low sunlight exposure, providing a precise daily combination of vitamin D3 and K2 without unnecessary fillers or gimmicks.
- High-strength vitamin D3 with vitamin K2 for balanced daily supplementation
- Designed for low sunlight, indoor lifestyles and winter months
- Vegetarian-friendly, non-GMO, with no unnecessary additives
- Manufactured in a GMP-certified facility for consistent quality
1 Capsule daily. Simple, consistent use.
Frequently asked questions
Why do we need Vitamin D3 + K2?
Vitamin D3 helps your body absorb calcium for strong bones, teeth, and muscles. Vitamin K2 makes sure that calcium is directed into the right places — supporting bone density and cardiovascular health.
Why should I take Vitamin D3 + K2 together?
D3 boosts calcium absorption, but without K2, calcium may be deposited in arteries instead of bones. Taking them together ensures calcium is absorbed and used effectively.
How much D3 + K2 should I take daily for it to be effective?
Most adults benefit from around 1,000–4,000 IU of Vitamin D3 and 90–200 µg of Vitamin K2 (MK-7) daily. Always follow the guidance on your supplement label and check with your GP if unsure.
When is the best time to take Vitamin D3 + K2?
Since both vitamins are fat-soluble, they are best taken with a meal that includes healthy fats — breakfast, lunch, or dinner works well.
Can Vitamin D3 + K2 interfere with medications?
Yes. K2 can affect blood-thinning medicines, while D3 may interact with certain heart or kidney treatments. Speak to your doctor if you’re taking prescription medication.
Who should take extra care?
People on anticoagulants, those with kidney or calcium balance issues, and women who are pregnant or breastfeeding should consult a healthcare professional first.
What does MK-7 mean?
MK-7 is a natural form of Vitamin K2 that stays active in the body longer than other types, giving reliable support with once-daily use.
Can I get enough Vitamin D3 + K2 from diet and sunlight alone?
It’s difficult in the UK, especially in autumn and winter when sunlight is limited. Vitamin K2-rich foods are also uncommon, so supplements are often recommended
