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SLT+ High-Strength Electrolyte Supplement
SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement SLT+ High-Strength Electrolyte Supplement

SLT+ High-Strength Electrolyte Supplement

Elite-level hydration, made simple

SLT+ is your essential high-strength hydration formula, created specifically for endurance athletes. It delivers a potent, scientifically formulated dose of the four key electrolytes lost in sweat to help maintain hydration, reduce fatigue, support performance, and promote faster recovery.

Developed for demanding conditions, heavy sweat loss, and hot climates, SLT+ replenishes and gives back, for maximum function and flavour. Designed for race conditions, in a compact and lightweight single-serve sachet.

Hydration that works as hard as you do. Recovery that starts before the finish.

Select Flavour:

OrangeBerry & Lime
Orange
€35,99
1 box / 30 servings€1,19 per unit

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Performance-tested, athlete-approved

SLT+ delivers 1080mg of sodium plus potassium, magnesium, and calcium to support hydration, reduce cramping, and keep you performing under pressure.

Built on science and shaped by feedback from elite athletes and everyday endurance users. From gut tolerance to flavour, from dosing to mixability, every detail has been tested, refined, and rebuilt for real-world performance. 

Tested and certified by Informed Sport. SLT+ is screened for banned substances so you know exactly what you're putting in your body. Nothing hidden, nothing harmful, just clean, regulated, effective hydration, that you can trust.

Years of testing for
demanding conditions

SLT+ is the result of years of testing and scientific refinement engineered for heavy sweat loss, tough conditions, and serious endurance.

From the original SLT05 to SLT07 and now SLT+, we’ve spent years adapting the formula to give you the best possible hydration, based on your training and racing conditions. Allowing you to choose the right level of hydration, when it matters most.

1080mg Sodium
280mg Potassium
120mg Magnesium
60mg Calcium

What fuels every dose of SLT+?

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.

SLT+ High-Strength Electrolyte Supplement
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.

Trusted. Tested. Certified. IFS Logo

Trusted. Tested. Certified.

IFS Logo

Every batch is Informed Sport Informed certified—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

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

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Fuelling the everyday athlete

Real results, real people