Enduro D combines Vitamin D3 with two forms of Vitamin K2—MK-4 and MK-7—in one convenient daily softgel. Designed for active adults, runners, cyclists and triathletes who want a straightforward Vitamin D3 and K2 food supplement.
Nutritional Benefits
- Vitamin D contributes to the maintenance of normal bones.
- Vitamin D contributes to the maintenance of normal muscle function.
- Vitamin D contributes to the normal function of the immune system.
- Vitamin D contributes to normal calcium and phosphorus absorption and utilisation.
- Vitamin K contributes to the maintenance of normal bones.
- Vitamin K contributes to normal blood clotting.
Vitamin D3 + Dual-Form Vitamin K2
Vitamin D3—50µg (2,000 IU)
Enduro D contains Vitamin D3 as cholecalciferol.
Vitamin D contributes to:
- Normal immune-system function
- The maintenance of normal bones
- The maintenance of normal muscle function
- Normal blood calcium levels
- Normal absorption and utilisation of calcium and phosphorus
Vitamin K2—1,680µg
Enduro D combines two forms of Vitamin K2:
- Vitamin K2 as MK-4: 1,500µg
- Vitamin K2 as MK-7: 180µg
Vitamin K contributes to the maintenance of normal bones and normal blood clotting.
Who Is Enduro D For?
Enduro D is designed for active adults, including runners, cyclists and triathletes, who want a convenient Vitamin D3 and K2 supplement as part of their daily nutrition routine.
How to Use
Adults: Take one softgel daily with a meal, or as directed by a qualified healthcare professional.
Do not exceed the recommended daily intake. Account for Vitamin D supplied by any other supplements you use.
Nutritional Information
Serving size: 1 softgel
Servings per container: 30
- Vitamin D3 as cholecalciferol: 50µg / 2,000 IU — 1,000% NRV
- Vitamin K2 as MK-4: 1,500µg
- Vitamin K2 as MK-7: 180µg
- Total Vitamin K: 1,680µg — 2,240% NRV
NRV: Nutrient Reference Value.
Ingredients: Capsule shell (gelatin, glycerin, purified water), olive oil, Vitamin D3 as cholecalciferol, Vitamin K2 as menaquinone-4 (MK-4) and menaquinone-7 (MK-7).
Important Information
Food supplements should not be used as a substitute for a varied, balanced diet and healthy lifestyle.
Do not exceed the recommended daily intake. Keep out of the reach of children.
Consult a qualified healthcare professional before use if you are pregnant, breastfeeding, have a medical condition or take medication. Vitamin K may interact with anticoagulant medicines such as warfarin.
Store according to the instructions on the product label.
Disclaimer: These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare professional before use.
Let customers speak for us
By far the best tasting recovery drink I’ve used in over 25 years. Lovely taste and consistency. It’s my go to protein drink now!
Hammer Nutrition Perpetuem was a key part of my fuelling strategy for the Leeds Ironman last weekend.
It gave me steady, reliable energy throughout the race and, most importantly, sat really well in my stomach.
No heavy feeling, I was able to keep fuelling consistently right throughout my cycling. A great product for long-distance — so glad this was recommended to me during my early training in preparation.
Extremely useful to use whilst cycling, removes the faff of opening gels whilst cycling and the solid bottle makes it easy to get in / out of jersey pockets.
Brilliant product - i use these in all my endurance events - some lasting up to 20 hours. These are great to ensure you get the required electrolytes without over hydrating.
Great product! Very good quality supplement
Great service and the products are amazing, especially for endurance sports. I'm a big fan of the Endrolytes Electrolyte Caps. Their magnesium supplement and vitamin D are also very very good! I would highly recommend.
I’ve used Hammer products for around 6 years now & my favourite by a mile is the hammer Perpetuem, it’s fueled my last 100 mile ultra marathon not to mention multiple long distance triathlon's . It has 180calories per serving and it’s 34g of carbs & 5g of protein seems to work well . I’d strongly recommend for anyone who wants to take on ultra races as this fuel will support you when you need it most .
I started using Hammer Heed and Perpetuem 5 years ago and it's been such a game changer for my. Finding nutrition you can trust is so important for any athlete and I highly recommend Hammer Nutrition for any distance and any sport.
I couldnt race without hammer products. Heed is my favourite, such an amazing product. Paired with the gels it makes a great fueling recipe. Always fast shipping
Wonderful product for general Well being and Recovery. Great quick shipping.
Love all your products. I personally will concentrate on the perpetuum for my long swim(45km) as it feels like a meal every 4mins.
Thank you
great taste! great weight to calorie ratio! thanks
Frequently Asked Questions
How long will my delivery take and how much does it cost?
Orders placed before 2:00 PM (UK time) are dispatched the same working day. Standard delivery to mainland Great Britain takes 2–5 days at a flat rate of £3.50, or free on orders over £10.
Large tubs are automatically upgraded to DPD next-day delivery. Shipping to Northern Ireland, the Channel Islands, and the Scottish Highlands costs £4.50, or free on orders over £80.
Can I change or cancel my order after placing it?
Because we process and dispatch orders quickly, we are usually unable to modify products, delivery methods, or addresses after submission.
To cancel an order, you must contact us on the same calendar day it was placed. If dispatch has already occurred, you can return the unused items within 14 days at your own shipping expense.
What is your returns policy if I change my mind?
You have 14 days from the day after delivery to cancel your order. Items must be unused, in their original packaging, and in resaleable condition. Important Step:
You must email us via the bottom of our Home Page first to obtain a Returns Authorisation Number and a free Royal Mail returns sticker; unauthorised returns cannot be processed.
Note that opened, sealed supplements cannot be returned for hygiene reasons.
What should I do if my order is damaged, faulty, or incorrect?
Check your parcel immediately upon arrival. If there is an issue, notify us within 48 hours of delivery via teh contact us at the bottom of our Home page.
Please include your order number, a description of the issue, and photos of the damaged items and packaging. We will provide a free replacement or full refund.
How long do refunds take to process?
Once your return is received, inspected, and approved, we process refunds back to your original payment method (card, PayPal, or bank transfer).
This typically takes place within 7 working days, and always within a maximum window of 30 days.
Are Hammer Nutrition products safe for drug-tested athletes?
Yes. Key products within our range—including Endurolytes (4ct/120ct), Endurolytes Extreme (3ct/120ct), Endurolytes Extreme Powder, and Endurolytes Fizz - are officially Informed Sport certified.
Additionally, our products are manufactured in strict ISO, GMP-compliant, and SQF Level 3 Certified facilities to ensure the highest standards of food safety and purity.
What do you use to flavour your sports nutrition products?
We use only premium ingredients with zero artificial flavours, artificial sweeteners, or chemical colorants.
Our natural flavours are extracted from real food sources (such as fruits, essential oils, and botanicals) in full compliance with FDA regulations.
They are entirely derived from non-allergenic materials and are formulated for a clean, subtle, non-sweet taste.
What should I do if my order has not arrived?
Estimated transit times are 2–5 days. If your parcel has not arrived within 5 days of placing your order, notify us immediately via our contact us at the bottom of our Home page.
We will launch an investigation with the carrier and provide updates or arrange a replacement where appropriate.
Do you accept backorders for out-of-stock items?
No, we do not accept backorders. If an item is currently unavailable, you can enter your email address in the "email me when back in stock" widget directly on the product page to receive an automated real-time notification the moment inventory is replenished.
Are your supplements suitable for specific dietary restrictions?
Our clean sports nutrition range is formulated to support optimal body function and is completely free from gluten, artificial preservatives, and artificial colorants.
If you have specific medical conditions or severe allergen concerns, we recommend checking the explicit ingredient panels or consulting a healthcare professional prior to consumption.
