Mix & Match. Choose any 3 supplements from our Ultimate Wellness bundle and get 12% discount.
Quick Benefits
- Provides antioxidant support to protect your body during heavy training.
- Helps support the immune system and overall health year-round.
- Helps reduce aches and soreness after high-intensity activity.
What makes Endurance C different?
Most vitamin C products are just vitamin C. Endurance C is built differently, delivering an elite immune boost engineered for endurance athletes.
Two Forms of Vitamin C
1) Calcium Ascorbate (Buffered / Non-Acidic Neutral C)
- pH 7.0-7.4, gentler than standard ascorbic acid.
- Avoids gastric distress common with standard vitamin C.
- Delivers 92 mg calcium for bone support.
2) Ascorbyl Palmitate (Fat-Soluble Vitamin C)
- Highly bioavailable, non-acidic form that reaches deep tissue.
- Neutralizes free radicals across multiple body systems.
- Protects lipids to support hormone function and nerve signaling.
More Than Vitamin C: The Synergy Stack
Endurance C includes supportive compounds most supplements lack, designed for maximum immunity during heavy training cycles.
How to Use
Daily: Take 3 capsules daily in divided doses for best results.
Training days:
- Take 1 capsule before training.
- Take 2 capsules after to aid recovery.
- Ideal for cycling, running, and triathlon.
Ingredient Breakdown
Calcium Ascorbate - Buffered neutral C (pH 7.0-7.4) for a gentler experience, plus meaningful calcium for athletes.
Ascorbyl Palmitate - Fat-soluble vitamin C for broader antioxidant coverage and lipid protection during intense exercise.
Citrus Bioflavonoids - Work synergistically with vitamin C to support antioxidant activity and joint comfort.
Hesperidin (95% HPLC) - Supports antioxidant defenses and healthy blood vessel function for circulatory health.
Quercetin - Strong antioxidant activity supporting immune function and seasonal allergy relief.
Rose Hips (Rosa canina) - Natural vitamin C source rich in carotenoids and polyphenols for immune and wellness support.
Disclaimer: These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
Let customers speak for us
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 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
Great quality feel and easy to drink from whilst riding.
No plastic smells either.
Just need a few different colours?
Help me through a 70 miler. Would recommend 👌
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.