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    SLT+ is the result of years of testing, refining and pushing boundaries. An evolution of the original SLT05, reengineered for today’s toughest efforts. We’re on a mission to redefine limits through science-backed products, tested by athletes and built for those who demand more.

    Get a free limited-edition bottle with your first subscription delivery.

    If you alter or leave the checkout, the promotion will no longer apply.

    Buy SLT+ Offer Now

    30 day money-back guarantee

    Free UK Next-Day Shipping

    High sodium dose

    Vegan & Gluten-Free

    Complete Electrolyte Profile

    Flavour Focused

    Back by science

    Informed Sports Certified

    Consistency wins. Don’t leave it to chance. Your best performance starts with preparation. We’ll handle the fuel.

    Save Every Time
    Enjoy up to 47% off your order - no codes, no fuss.

    Flexible & In Your Control
    Pause, skip, or cancel anytime. You’re in charge.

    Never Run Out
    Your fuel, delivered before you need it. No gaps, no panic reorders.

    Fuel Like the Pros
    The same system trusted by elite endurance athletes.

    Free Gifts & Exclusive Rewards
    Unlock bonus item with first purchase based on your chosen plan.

    Built for Consistency
    No broken routines, no missed sessions.

    (4.8) 1035 reviews

    (4.8) 1035 reviews

    Flavours

    Orange Berry & Lime Variety Pack

    SLT+ Double Subscription

    €0

    60 servings, individual sachets

    1x Nalgene Bottle

    Free €29,95

    1x 1000ml Styrkr Bottle

    UK Next Day Delivery

    Free £4.99

    Free Delivery

    Total

    €0 €34,94

    SLT+ Single Subscription

    €0

    30 servings, individual sachets

    Limited Edition SLT+ Bottle

    Free €5,95

    1x 500ml Styrkr Bottle

    UK Next Day Delivery

    Free £4.99

    Free Delivery

    Total

    €0 €10,94

    SLT+ One-Off Purchase

    €0

    30 servings, individual sachets

    UK Next Day Delivery

    £4.99

    Total

    €4,99

    Choose your bundle

    100% Off Best Value
    SLT+ Double Subscription €0 Save €34,94
    100% Off Most Popular
    SLT+ Single Subscription €0 Save €10,94
    SLT+ One-Off Purchase €4,99

    30 day money back guarantee

    High-strength 
electrolyte supplement

    SLT+ delivers a high-strength sodium dose (1080mg) alongside potassium, magnesium, and calcium essential minerals that help the body perform under stress and recover efficiently.

    1080mg Sodium
    280mg Potassium
    120mg Magnesium
    60mg Calcium
    Trusted. Tested. Certified. IFS Logo

    Trusted. Tested. Certified.

    IFS Logo

    Every batch is Informed Sport Informed certified and rigorously tested for banned substances so you can hydrate with confidence, no matter the stage or season.

    View Certificate

    "Using informed sport products is a non negotiable for me. It gives me complete peace of mind to know exactly what I am putting into my body so all I need to worry about is performing my best." — Elsey Davis

    What fuels every SLT+ dose?

    High dose, endurance ready

    Delivers 1080mg sodium per serving - one of the highest on the market built for serious endurance athletes.

    Powerful hydration support

    Designed to help replace key electrolytes lost through sweat and reduce tiredness and fatigue.

    Backed by science

    Formulated using research-driven ratios to support energy, focus, and muscle function during endurance activity.

    Bold flavours, fast mix

    Fast-dissolving and light on the gut, with clean-tasting Berry & Lime and Orange flavour options.

    Vegan and gluten-free

    Vegan friendly and gluten-free so you never have to compromise your regime.

    Small but powerful

    Just 7.5g per sachet, easy to carry and delivers a performance-focused electrolyte hit.

    SLT+ (Orange)
    Nutritional Value Per 100g Per Serving (7.5g) %RI
    Energy (kJ) 548 41 0.5
    Energy (KCAL) 130 10 0.5
    Fat (g) 0 0 0
    Saturated (g) 0 0 0
    Carbohydrate (g) 10.6 0.8 0.3
    Sugars (g) 0 0 0
    Fibre (g) 0 0 0
    Protein (g) 0 0 0
    Salt (g) 36.9 2.8 46.7
    Component Per Serving (7.5g)
    Sodium 1080mg
    Potassium 280mg
    Magnesium 120mg
    Calcium 60mg


    SLT+ (Berry & Lime)
    Nutritional Value Per 100g Per Serving (7.5g) %RI
    Energy (kJ) 569 43 0.5
    Energy (KCAL) 135 10 0.5
    Fat (g) 0 0 0
    Saturated (g) 0 0 0
    Carbohydrate (g) 12 0.9 0.3
    Sugars (g) 0 0 0
    Fibre (g) 0 0 0
    Protein (g) 0 0 0
    Salt (g) 36.9 2.8 46.7
    Component Per Serving (7.5g)
    Sodium 1080mg
    Potassium 280mg
    Magnesium 120mg
    Calcium 60mg
    SLT+ (Orange)

    Full ingredients

    Sodium Chloride, Acid (Citric Acid), Natural Flavouring, Potassium Chloride, Magnesium Citrate, Sweetener (Steviol Glycosides), Calcium Malate.

    SLT+ (Berry & Lime)

    Full ingredients

    Sodium Chloride, Acid (Citric Acid), Natural Flavourings, Potassium Chloride, Magnesium Citrate, Calcium Malate, Sweetener (Steviol Glycosides).

    Four key electrolytes that help maintain hydration

    SLT+ delivers a high-strength sodium dose (1080mg) alongside potassium, magnesium, and calcium essential minerals that help the body perform under stress and recover efficiently.

    Sodium (Chloride)

    Sodium (Chloride)

    Supports fluid balance, helps maintain normal blood pressure, and is essential for muscle and nerve function.

    Potassium (Chloride)

    Potassium (Chloride)

    Supports normal muscle and nerve function and helps maintain healthy blood pressure levels.

    Magnesium (Citrate)

    Magnesium (Citrate)

    Helps reduce tiredness and fatigue while supporting energy release, muscle function, and electrolyte balance.

    Calcium (Malate)

    Calcium (Malate)

    Essential for strong bones and teeth, supports muscle function, and plays a key role in energy metabolism.

    Combat energy loss

    Electrolytes play a role in energy metabolism and can help reduce the sensation of tiredness during prolonged activity. Maintaining adequate levels supports your body's natural energy-producing processes.

    Complete electrolyte profile

    Endurance sports can lead to significant sweat loss, which depletes essential electrolytes like sodium, potassium, and magnesium. Replenishing these minerals helps maintain fluid balance, supporting key functions such as nerve signalling and muscle responsiveness.

    Muscle function and recovery

    Proper electrolyte intake contributes to normal muscle function, which is essential during and after exercise. It also supports processes like protein synthesis and bone health, both vital for recovery and overall performance.

    Built for Every Stage of Your Effort

    Elite-level hydration support — wherever you are in the session.

    Before

    Start strong with key electrolytes to prep muscles and support hydration.

    During

    Stay fuelled with fast electrolytes to keep going longer and stronger.

    After

    Replenish lost salts to aid recovery, reduce fatigue, and restore balance.

    Recommended by Top Athletes

    We have a growing worldwide roster of multi-discipline athletes who use our products during training and in competition. We know our products make a difference, because they use them when it matters most.

    • Lionel Sanders
      Lionel Sanders Professional Triathlete

      "I look forward to my Styrkr Bar. Every. Single. Day"

    • Imo Boddy
      Imo Boddy World Record Holder and Ultra Endurance Athlete

      "Dialing in my nutrition has been a huge focus over the past year, and Styrkr has always been a brand I’ve naturally gravitated towards—their products work brilliantly for me, and I love what they stand for."

    • Tom Joly
      Tom Joly Ultra Endurance Athlete

      "STYRKR’s high-carb products let me push further—11 gels (550g) in one bottle might just be a record! Pure endurance fuel."

    • Ed Laverack
      Ed Laverack Performance Cyclist

      "I’ve been able to surpass my expectations in my endurance challenges this year because I’ve been able to trust and rely on my fuel. There is little doubt that strategic on-demand fuelling has transformed my performances at events like the 290km+ Dragon Ride and the Tour de Mont Blanc."

    • Chris Hall
      Chris Hall Endurance Cyclist

      "Styrkr's energy bars are a tasty and convenient addition to my adventure arsenal. They provide fast carbs and are easy to carry – a must-have for my challenges!"

    Fuelling the everyday athlete

    The Styrkr sports fuel range is the culmination of many months of research and development with one clear focus: to help everyday athletes reach their next endurance goal. We listen to what our customers have to say and are committed to providing industry-leading and innovative fuelling solutions at an affordable price.

    UK Manufactured

    Non-GMO

    High quality ingredients

    Buy now
    Fuelling the everyday athlete

    Real results, real people