Extraordinary Immune Defense & Support
When your schedule’s brutal, sleep is short, travel is frequent, or everyone around you is coughing like it’s a hobby—this is your daily immune-support stack.
WHAT IT DOES:
- Supports immune defense with nutrient “superstars”
- Delivers extraordinary multi-antioxidant power
- Helps reduce aches and soreness (especially when recovery is taking longer than it used to)
Kit contains
WHO SHOULD BE USING IT:
Ideal for:
- Anyone who wants daily immune support year-round
- People who spend lots of time indoors (office life / winter months) and may not get enough sunlight
- Athletes and active people who want immune support during heavy training blocks
- Frequent travelers, busy parents, healthcare/retail/service workers—anyone exposed to more “public air”
- Anyone who wants immune support and extra antioxidant coverage to help manage daily stress + soreness
Check first / use with guidance if:
- You’re pregnant/nursing, on medication, or managing a condition — speak with your healthcare professional
- You have kidney issues, a history of high calcium, or are already taking high-dose vitamin D — confirm your total intake first
FAQs:
EnDuro D (Vitamin D)
How important is Vitamin D for the immune system?
Very. Since many cells and tissues have vitamin D receptors, it plays broad roles throughout the body. For immune health specifically, vitamin D is often described as a “front line defense” nutrient because it supports both innate and adaptive immune responses. Your references note that immune cells can both synthesize and respond to vitamin D, and that low vitamin D status has been linked in research to higher risk in multiple chronic disease areas.
What forms of vitamin D exist — and why use D3?
- D2 (ergocalciferol): plant-derived
-
D3 (cholecalciferol): sun-derived / commonly sourced from lanolin
D3 was selected because it’s generally considered more effective at raising active vitamin D levels than D2.
Endurance C (Why it’s different)
What makes Endurance C different from typical vitamin C?
It’s not just “cheap ascorbic acid in a capsule.”
Two forms of Vitamin C:
- Calcium Ascorbate (buffered / non-acidic, gentler on the stomach; also provides a bit of calcium)
- Ascorbyl Palmitate (fat-soluble form that can reach areas standard water-soluble C may not; helps protect lipids from oxidation)
Plus synergistic immune-support compounds:
- Citrus Bioflavonoids (“Vitamin P”) – antioxidant support + circulation support; can also help with aches/soreness
- Hesperidin (95% HPLC) – antioxidant support + blood vessel/circulation support; also supports soreness reduction
- Quercetin – powerful antioxidant support; also supports comfort during seasonal challenges; pairs well with vitamin C for absorption synergy
- Rose Hips – natural vitamin C source + antioxidant polyphenols/carotenoids (including tiliroside)
Why did IU change to micrograms or milligrams?
The FDA required many supplement labels to move from International Units (IU) to metric units (mcg/mg). The key point: the amount didn’t change—only the unit did.
Vitamin D conversion:
1 IU = 0.025 mcg
So 2,000 IU = 50 mcg (that’s why EnDuro D may now show 50 mcg instead of 2,000 IU).
Immunity Booster Kit = D + C done right.
A daily two-supplement stack for immune defense support, antioxidant protection, and help staying resilient during heavy training, travel, and high-stress seasons.
Let customers speak for us
In my basket for more
Helped on a climb in 34c heat…. Yum flavour too
I've been using these for years and feel they give me a good foundation for my health.
Easy to take and and did the job. Meant I could drink plain water without missing out on electrolytes
My go to product to supplement my electrolyte needs.
Easy to use and nice taste.
On Saturday 14th September I stood on the start line at Bewts Y Coed. This was my 3rd 100 miler this year.
I have used Hammer since around 2010 in my Ironman days. As of today I have completed 428 marathons ‘all official races’ around the globe.. also quite a few ultras in my time.
I have used Recoverite on multi day ultras for the last 10 years. Great mix and flavour. I have converted many to this product.
Seems to be really helping recovery from my knee strain. I had a similar issue a couple of years ago which took weeks to sort. Fair do’s it doing what it says it will.
Tasty and light on the stomach.
I will definitely order many more of these
Great electrolytes and gentle on the stomach.
I have a sensitive stomach but these products are the best I have tried.
Another superb product from the Hammer Team. Dissolves so quickly with just a stir with a spoon or a quick shake in a bottle. Can feel the difference in sleep pattern for sure and energy levels have been more consistent with the mid afternoon lag not being as noticeable.
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 info@hammernutrition.co.uk 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 at info@hammernutrition.co.uk.
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 at info@hammernutrition.co.uk.
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.
